<structname>pg_stat_xact_sys_tables</>,
<structname>pg_stat_xact_user_tables</>, and
<structname>pg_stat_xact_user_functions</>, or via these views' underlying
- functions. These numbers do not act as stated above; instead they update
- continuously throughout the transaction.
+ functions (named the same as the standard statistics functions but with the
+ prefix <function>pg_stat_get_xact_</function>). These numbers do not act
+ as stated above; instead they update continuously throughout the transaction.
</para>
<table id="monitoring-stats-views-table">
into the kernel's handling of I/O.
</para>
+ <para>
+ Other ways of looking at the statistics can be set up by writing
+ queries that use the same underlying statistics access functions as
+ these standard views do. These functions are listed in <xref
+ linkend="monitoring-stats-funcs-table">. The per-database access
+ functions take a database OID as argument to identify which
+ database to report on. The per-table and per-index functions take
+ a table or index OID. The functions for function-call statistics
+ take a function OID. (Note that only tables, indexes, and functions
+ in the current database can be seen with these functions.) The
+ per-server-process access functions take a server process
+ number, which ranges from one to the number of currently active
+ server processes.
+ </para>
+
+
<table id="pg-stat-activity-view" xreflabel="pg_stat_activity">
<title>pg_stat_activity view</title>
<row>
<entry>datid</entry>
<entry><type>oid</></entry>
- <entry>The oid of the database the backend is connected to.</entry>
+ <entry>The oid of the database the backend is connected to.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_backend_dbid</function>.</entry>
</row>
<row>
<entry>datname</entry>
<row>
<entry>pid</entry>
<entry><type>integer</></entry>
- <entry>The process ID of the backend.</entry>
+ <entry>The process ID of the backend.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_backend_pid</function>.</entry>
</row>
<row>
<entry>usesysid</entry>
<entry><type>oid</></entry>
- <entry>The id of the user logged into the backend.</entry>
+ <entry>The id of the user logged into the backend.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_backend_userid</function>.</entry>
</row>
<row>
<entry>usename</entry>
If this field is not set, it indicates that the client is either connected
via a Unix socket on the server machine or is an internal process such
as autovacuum.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_backend_client_addr</function>.
</entry>
</row>
<row>
<entry>
The remote TCP port that the client is using for communication
to the backend, or <symbol>NULL</> if a unix socket is used.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_backend_client_port</function>.
</entry>
</row>
<row>
<entry>
The time when this process was started, i.e. when the
client connected to the server.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_backend_start</function>.
</entry>
</row>
<row>
The time when the current transaction was started. If the client is
using autocommit for transactions, this value is equal to the
query_start column.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_backend_xact_start</function>.
</entry>
</row>
<row>
The time when the currently active query started, or if
<structfield>state</> is <literal>idle</>, when the last query
was started.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_backend_activity_start</function>.
</entry>
</row>
<row>
<entry><type>boolean</></entry>
<entry>
Boolean indicating if a backend is currently waiting on a lock.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_backend_waiting</function>.
</entry>
</row>
<row>
per server process, showing information related to each connection to
the server.
</para>
+ <para>
+ All functions used in the view are indexed by backend id number. The
+ function <function>pg_stat_get_backend_idset</function> provides a
+ convenient way to generate one row for each active server process. For
+ example, to show the <acronym>PID</>s and current queries of all server processes:
+
+<programlisting>
+SELECT pg_stat_get_backend_pid(s.backendid) AS pid,
+ pg_stat_get_backend_activity(s.backendid) AS query
+ FROM (SELECT pg_stat_get_backend_idset() AS backendid) AS s;
+</programlisting>
+ </para>
<table id="pg-stat-bgwriter-view" xreflabel="pg_stat_bgwriter">
<title>pg_stat_bgwriter view</title>
<row>
<entry>checkpoints_timed</entry>
<entry><type>bigint</type></entry>
- <entry>Number of scheduled checkpoints</entry>
+ <entry>Number of scheduled checkpoints.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_bgwriter_timed_checkpoints</function> function.</entry>
</row>
<row>
<entry>checkpoints_requested</entry>
<entry><type>bigint</type></entry>
- <entry>Number of requested checkpoints</entry>
+ <entry>Number of requested checkpoints.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_bgwriter_requested_checkpoints</function> function.</entry>
</row>
<row>
<entry>buffers_checkpoint</entry>
<entry><type>bigint</type></entry>
- <entry>Number of buffers written during checkpoints</entry>
+ <entry>Number of buffers written during checkpoints.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_bgwriter_buf_written_checkpoints</function> function.</entry>
</row>
<row>
<entry>buffers_clean</entry>
<entry><type>bigint</type></entry>
- <entry>Number of buffers written by the background writer</entry>
+ <entry>Number of buffers written by the background writer.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_bgwriter_buf_written_clean</function> function.</entry>
</row>
<row>
<entry>maxwritten_clean</entry>
<entry><type>bigint</type></entry>
<entry>Number of times the background writer stopped a cleaning
- scan because it had written too many buffers</entry>
+ scan because it had written too many buffers.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_bgwriter_maxwritten_clean</function> function.</entry>
</row>
<row>
<entry>buffers_backend</entry>
<entry><type>bigint</type></entry>
- <entry>Number of buffers written directly by a backend</entry>
+ <entry>Number of buffers written directly by a backend.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_buf_written_backend</function> function.</entry>
</row>
<row>
<entry>buffers_backend_fsync</entry>
<row>
<entry>buffers_alloc</entry>
<entry><type>bigint</type></entry>
- <entry>Number of buffers allocated</entry>
+ <entry>Number of buffers allocated.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_buf_alloc</function> function.</entry>
</row>
<row>
<entry>stats_reset</entry>
<entry><type>bigint</type></entry>
- <entry>The last time these statistics were reset</entry>
+ <entry>The last time these statistics were reset.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_bgwriter_stat_reset_time</function> function.</entry>
</row>
</tbody>
</tgroup>
<entry>The number of backends currently connected to this database.
This is the only column in this view that returns a value for the
current state, all other columns return the accumulated values since
- the last reset.</entry>
+ the last reset. This value can also be returned by directly calling
+ the <function>pg_stat_get_db_numbackends</function> function.</entry>
</row>
<row>
<entry>xact_commit</entry>
<entry><type>bigint</></entry>
- <entry>The number of transactions in this database that has committed</entry>
+ <entry>The number of transactions in this database that has committed.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_db_xact_commit</function> function.</entry>
</row>
<row>
<entry>xact_rollback</entry>
<entry><type>bigint</></entry>
- <entry>The number of transactions in this database that has rolled back</entry>
+ <entry>The number of transactions in this database that has rolled back.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_db_xact_rollback</function> function.</entry>
</row>
<row>
<entry>blks_read</entry>
<entry><type>bigint</></entry>
- <entry>The number of disk blocks read in this database</entry>
+ <entry>The number of disk blocks read in this database.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_db_blocks_fetched</function> and
+ <function>pg_stat_get_db_blocks_hit</function> functions and
+ subtracting the results.</entry>
</row>
<row>
<entry>blks_hits</entry>
<entry><type>bigint</></entry>
<entry>The number of disk blocks read from the buffer cache
(this only includes hits in the PostgreSQL buffer cache, and not
- the operating system filesystem cache)</entry>
+ the operating system filesystem cache).
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_db_blocks_hit</function> function.</entry>
</row>
<row>
<entry>tup_returned</entry>
<entry><type>bigint</></entry>
- <entry>The number of rows returned by queries in this database</entry>
+ <entry>The number of rows returned by queries in this database.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_db_tuples_returned</function> function.</entry>
</row>
<row>
<entry>tup_fetched</entry>
<entry><type>bigint</></entry>
- <entry>The number of rows fetched by queries in this database</entry>
+ <entry>The number of rows fetched by queries in this database.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_db_tuples_fetched</function> function.</entry>
</row>
<row>
<entry>tup_inserted</entry>
<entry><type>bigint</></entry>
- <entry>The number of rows inserted by queries in this database</entry>
+ <entry>The number of rows inserted by queries in this database.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_db_tuples_inserted</function> function.</entry>
</row>
<row>
<entry>tup_updated</entry>
<entry><type>bigint</></entry>
- <entry>The number of rows updated by queries in this database</entry>
+ <entry>The number of rows updated by queries in this database.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_db_tuples_updated</function> function.</entry>
</row>
<row>
<entry>tup_deleted</entry>
<entry><type>bigint</></entry>
- <entry>The number of rows deleted by queries in this database</entry>
+ <entry>The number of rows deleted by queries in this database.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_db_tuples_deleted</function> function.</entry>
</row>
<row>
<entry>conflicts</entry>
<entry>
The number of queries canceled due to conflict with recovery
(on standby servers) in this database. (See
- <xref linkend="pg-stat-database-conflicts-view"> for more details)
+ <xref linkend="pg-stat-database-conflicts-view"> for more details).
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_db_conflict_all</function> function.
</entry>
</row>
<row>
All temporary files are counted, regardless of why the temporary file
was created (sorting or hash) or file size, and regardless of the
<xref linkend="guc-log-temp-files"> setting.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_db_temp_files</function> function.
</entry>
</row>
<row>
the database. All temporary files are counted, regardless of why
the temporary file was created (sorting or hash) or file size, and
regardless of the <xref linkend="guc-log-temp-files"> setting.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_db_temp_bytes</function> function.
</entry>
</row>
<row>
<entry>deadlocks</entry>
<entry><type>bigint</></entry>
- <entry>Number of deadlocks detected in the database</entry>
+ <entry>Number of deadlocks detected in the database.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_db_deadlocks</function> function.</entry>
</row>
<row>
<entry>stats_reset</entry>
<entry><type>timestamptz</></entry>
- <entry>The last time the statistics were reset</entry>
+ <entry>The last time the statistics were reset.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_reset_time</function> function.</entry>
</row>
</tbody>
</tgroup>
<entry>confl_tablespace</entry>
<entry><type>bigint</></entry>
<entry>The number of queries that have been canceled due to
- dropped tablespaces</entry>
+ dropped tablespaces. This value can also be returned by directly calling
+ the <function>pg_stat_get_db_conflict_tablespace</function> function.</entry>
</row>
<row>
<entry>confl_lock</entry>
<entry><type>bigint</></entry>
<entry>The number of queries that have been canceled due to
- lock timeouts</entry>
+ lock timeouts. This value can also be returned by directly calling
+ the <function>pg_stat_get_db_conflict_lock</function> function.</entry>
</row>
<row>
<entry>confl_snapshot</entry>
<entry><type>bigint</></entry>
<entry>The number of queries that have been canceled due to
- old snapshots</entry>
+ old snapshots. This value can also be returned by directly calling
+ the <function>pg_stat_get_db_conflict_snapshot</function> function.</entry>
</row>
<row>
<entry>confl_bufferpin</entry>
<entry><type>bigint</></entry>
<entry>The number of queries that have been canceled due to
- pinned buffers</entry>
+ pinned buffers. This value can also be returned by directly calling
+ the <function>pg_stat_get_db_conflict_bufferpin</function> function.</entry>
</row>
<row>
<entry>confl_deadlock</entry>
<entry><type>bigint</></entry>
<entry>The number of queries that have been canceled due to
- deadlocks</entry>
+ deadlocks. This value can also be returned by directly calling
+ the <function>pg_stat_get_db_conflict_startup_deadlock</function>
+ function.</entry>
</row>
</tbody>
</tgroup>
<row>
<entry>seq_scan</entry>
<entry><type>bigint</></entry>
- <entry>The number of sequential scans initiated on this table</entry>
+ <entry>The number of sequential scans initiated on this table.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_numscans</function> function.</entry>
</row>
<row>
<entry>seq_tup_read</entry>
<entry><type>bigint</></entry>
- <entry>The number of live rows fetch by sequential scans</entry>
+ <entry>The number of live rows fetch by sequential scans.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_tuples_returned</function> function.</entry>
</row>
<row>
<entry>idx_scan</entry>
<row>
<entry>idx_tup_fetch</entry>
<entry><type>bigint</></entry>
- <entry>The number of live rows fetch by index scans</entry>
+ <entry>The number of live rows fetch by index scans.</entry>
</row>
<row>
<entry>n_tup_ins</entry>
<entry><type>bigint</></entry>
- <entry>The number of rows inserted</entry>
+ <entry>The number of rows inserted.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_tuples_inserted</function> function.</entry>
</row>
<row>
<entry>n_tup_upd</entry>
<entry><type>bigint</></entry>
- <entry>The number of rows updated</entry>
+ <entry>The number of rows updated.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_tuples_updated</function> function.</entry>
</row>
<row>
<entry>n_tup_del</entry>
<entry><type>bigint</></entry>
- <entry>The number of rows deleted</entry>
+ <entry>The number of rows deleted.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_tuples_deleted</function> function.</entry>
</row>
<row>
<entry>n_tup_hot_upd</entry>
<entry><type>bigint</></entry>
- <entry>The number of rows HOT (i.e., no separate index update) updated</entry>
+ <entry>The number of rows HOT (i.e., no separate index update) updated.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_tuples_hot_updated</function> function.</entry>
</row>
<row>
<entry>n_live_tup</entry>
<entry><type>bigint</></entry>
- <entry>The number of live rows</entry>
+ <entry>The number of live rows.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_live_tuples</function> function.</entry>
</row>
<row>
<entry>n_dead_tup</entry>
<entry><type>bigint</></entry>
- <entry>The number of dead rows</entry>
+ <entry>The number of dead rows.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_dead_tuples</function> function.</entry>
</row>
<row>
<entry>last_vacuum</entry>
<entry><type>timestamp with time zone</></entry>
- <entry>The last time the table was manually non-<option>FULL</> vacuumed</entry>
+ <entry>The last time the table was manually non-<option>FULL</> vacuumed.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_last_vacuum_time</function> function.</entry>
</row>
<row>
<entry>last_autovacuum</entry>
<entry><type>timestamp with time zone</></entry>
- <entry>The last time the table was vacuumed by the autovacuum daemon</entry>
+ <entry>The last time the table was vacuumed by the autovacuum daemon.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_last_autovacuum_time</function> function.</entry>
</row>
<row>
<entry>last_analyze</entry>
<entry><type>timestamp with time zone</></entry>
- <entry>The last time the table was manually analyzed</entry>
+ <entry>The last time the table was manually analyzed.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_last_analyze_time</function> function.</entry>
</row>
<row>
<entry>last_autoanalyze</entry>
<entry><type>timestamp with time zone</></entry>
- <entry>The last time the table was analyzed by the autovacuum daemon</entry>
+ <entry>The last time the table was analyzed by the autovacuum daemon.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_last_autoanalyze_time</function> function.</entry>
</row>
<row>
<entry>vacuum_count</entry>
<entry><type>bigint</></entry>
- <entry>The number of times this table has been manually non-<option>FULL</> vacuumed</entry>
+ <entry>The number of times this table has been manually non-<option>FULL</> vacuumed.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_vacuum_count</function> function.</entry>
</row>
<row>
<entry>autovacuum_count</entry>
<entry><type>bigint</></entry>
- <entry>The number of times this table has been vacuumed by the autovacuum daemon</entry>
+ <entry>The number of times this table has been vacuumed by the autovacuum daemon.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_autovacuum_count</function> function.</entry>
</row>
<row>
<entry>analyze_count</entry>
<entry><type>bigint</></entry>
- <entry>The number of times this table has been manually analyzed</entry>
+ <entry>The number of times this table has been manually analyzed.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_analyze_count</function> function.</entry>
</row>
<row>
<entry>autoanalyze_count</entry>
<entry><type>bigint</></entry>
- <entry>The number of times this table has been analyzed by the autovacuum daemon</entry>
+ <entry>The number of times this table has been analyzed by the autovacuum daemon.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_autoanalyze_count</function> function.</entry>
</row>
</tbody>
</tgroup>
<row>
<entry>idx_scan</entry>
<entry><type>bigint</></entry>
- <entry>Number of index scans initiated on this index</entry>
+ <entry>Number of index scans initiated on this index.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_numscans</function> function.</entry>
</row>
<row>
<entry>idx_tup_read</entry>
<entry><type>bigint</></entry>
- <entry>Number of index entries returned by scans on this index</entry>
+ <entry>Number of index entries returned by scans on this index.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_tuples_returned</function> function.</entry>
</row>
<row>
<entry>idx_tup_fetch</entry>
<entry><type>bigint</></entry>
- <entry>Number of live table rows fetched by simple index scans using this index</entry>
+ <entry>Number of live table rows fetched by simple index scans using this index.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_tuples_fetched</function> function.</entry>
</row>
</tbody>
</tgroup>
<row>
<entry>heap_blks_read</entry>
<entry><type>name</></entry>
- <entry>Number of disk blocks read from this table</entry>
+ <entry>Number of disk blocks read from this table.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_blocks_fetched</function> and
+ <function>pg_stat_get_blocks_hit</function> functions and
+ subtracting the results.</entry>
</row>
<row>
<entry>heap_blks_hit</entry>
<entry><type>name</></entry>
- <entry>Number of buffer hits in this table</entry>
+ <entry>Number of buffer hits in this table.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_blocks_hit</function> function.</entry>
</row>
<row>
<entry>idx_blks_read</entry>
<row>
<entry>idx_blks_hit</entry>
<entry><type>name</></entry>
- <entry>Number of buffer hits in all indexes of this table</entry>
+ <entry>Number of buffer hits in all indexes of this table.</entry>
</row>
<row>
<entry>toast_blks_read</entry>
<row>
<entry>idx_blks_read</entry>
<entry><type>name</></entry>
- <entry>Number of disk blocks read from the index</entry>
+ <entry>Number of disk blocks read from the index.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_blocks_fetched</function> and
+ <function>pg_stat_get_blocks_hit</function> functions and
+ subtracting the results.</entry>
</row>
<row>
<entry>idx_blks_hit</entry>
<entry><type>name</></entry>
- <entry>Number of buffer hits in the index</entry>
+ <entry>Number of buffer hits in the index.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_blocks_hit</function> function.</entry>
</row>
</tbody>
</tgroup>
<row>
<entry>calls</entry>
<entry><type>bigint</></entry>
- <entry>Number of times the function has been called</entry>
+ <entry>Number of times the function has been called.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_function_calls</function> function.</entry>
</row>
<row>
<entry>total_time</entry>
<entry><type>bigint</></entry>
<entry>Total time spent in this functions and all other functions
- called by it, in milliseconds.</entry>
+ called by it, in milliseconds.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_function_time</function> function.</entry>
</row>
<row>
<entry>self_time</entry>
<entry><type>bigint</></entry>
<entry>Total time spent in this functions itself but not including
- other functions called by it, in milliseconds.</entry>
+ other functions called by it, in milliseconds.
+ This value can also be returned by directly calling
+ the <function>pg_stat_get_function_self_time</function> function.</entry>
</row>
</tbody>
</tgroup>
</para>
<sect3 id="monitoring-stats-functions">
- <title>Statistics Access Functions</title>
+ <title>Other Statistics Functions</title>
- <para>
- Other ways of looking at the statistics can be set up by writing
- queries that use the same underlying statistics access functions as
- these standard views do. These functions are listed in <xref
- linkend="monitoring-stats-funcs-table">. The per-database access
- functions take a database OID as argument to identify which
- database to report on. The per-table and per-index functions take
- a table or index OID. The functions for function-call statistics
- take a function OID. (Note that only tables, indexes, and functions
- in the current database can be seen with these functions.) The
- per-server-process access functions take a server process
- number, which ranges from one to the number of currently active
- server processes.
- </para>
<table id="monitoring-stats-funcs-table">
- <title>Statistics Access Functions</title>
+ <title>Other Statistics Functions</title>
<tgroup cols="3">
<thead>
</thead>
<tbody>
- <row>
- <entry><literal><function>pg_stat_get_db_numbackends</function>(<type>oid</type>)</literal></entry>
- <entry><type>integer</type></entry>
- <entry>
- Number of active server processes for database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_xact_commit</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of transactions committed in database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_xact_rollback</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of transactions rolled back in database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_blocks_fetched</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of disk block fetch requests for database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_blocks_hit</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of disk block fetch requests found in cache for database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_tuples_returned</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of tuples returned for database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_tuples_fetched</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of tuples fetched for database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_tuples_inserted</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of tuples inserted in database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_tuples_updated</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of tuples updated in database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_tuples_deleted</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of tuples deleted in database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_conflict_tablespace</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of queries canceled because of recovery conflict with dropped tablespaces in database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_conflict_lock</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of queries canceled because of recovery conflict with locks in database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_conflict_snapshot</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of queries canceled because of recovery conflict with old snapshots in database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_conflict_bufferpin</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of queries canceled because of recovery conflict with pinned buffers in database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_conflict_startup_deadlock</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of queries canceled because of recovery conflict with deadlocks in database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_stat_reset_time</function>(<type>oid</type>)</literal></entry>
- <entry><type>timestamptz</type></entry>
- <entry>
- Time of the last statistics reset for the database. Initialized to the
- system time during the first connection to each database. The reset time
- is updated when you call <function>pg_stat_reset</function> on the
- database, as well as upon execution of
- <function>pg_stat_reset_single_table_counters</function> against any
- table or index in it.
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_temp_bytes</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Amount of data written to temporary files by queries in the database.
- All temporary files are counted, regardless of why the temporary file
- was created (sorting or hash), and regardless of the
- <xref linkend="guc-log-temp-files"> setting.
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_temp_files</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of temporary files written by queries in the database. All temporary
- files are counted, regardless of why the temporary file was created
- (sorting or hash) or file size, and regardless of the
- <xref linkend="guc-log-temp-files"> setting.
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_db_deadlocks</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of deadlocks detected in the database
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_numscans</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of sequential scans done when argument is a table,
- or number of index scans done when argument is an index
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_tuples_returned</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of rows read by sequential scans when argument is a table,
- or number of index entries returned when argument is an index
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_tuples_fetched</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of table rows fetched by bitmap scans when argument is a table,
- or table rows fetched by simple index scans using the index
- when argument is an index
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_tuples_inserted</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of rows inserted into table
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_tuples_updated</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of rows updated in table (includes HOT updates)
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_tuples_deleted</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of rows deleted from table
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_tuples_hot_updated</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of rows HOT-updated in table
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_live_tuples</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of live rows in table
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_dead_tuples</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of dead rows in table
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_blocks_fetched</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of disk block fetch requests for table or index
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_blocks_hit</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of disk block requests found in cache for table or index
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_last_vacuum_time</function>(<type>oid</type>)</literal></entry>
- <entry><type>timestamptz</type></entry>
- <entry>
- Time of the last non-<option>FULL</option> vacuum initiated by the user on this table
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_last_autovacuum_time</function>(<type>oid</type>)</literal></entry>
- <entry><type>timestamptz</type></entry>
- <entry>
- Time of the last vacuum initiated by the autovacuum daemon on this table
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_last_analyze_time</function>(<type>oid</type>)</literal></entry>
- <entry><type>timestamptz</type></entry>
- <entry>
- Time of the last analyze initiated by the user on this table
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_last_autoanalyze_time</function>(<type>oid</type>)</literal></entry>
- <entry><type>timestamptz</type></entry>
- <entry>
- Time of the last analyze initiated by the autovacuum daemon on this
- table
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_vacuum_count</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- The number of times this table has been non-<option>FULL</> vacuumed manually
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_autovacuum_count</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- The number of times this table has been vacuumed by the autovacuum daemon
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_analyze_count</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- The number of times this table has been analyzed manually
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_autoanalyze_count</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- The number of times this table has been analyzed by the autovacuum daemon
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_xact_numscans</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of sequential scans done when argument is a table,
- or number of index scans done when argument is an index, in the current transaction
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_xact_tuples_returned</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of rows read by sequential scans when argument is a table,
- or number of index entries returned when argument is an index, in the current transaction
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_xact_tuples_fetched</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of table rows fetched by bitmap scans when argument is a table,
- or table rows fetched by simple index scans using the index
- when argument is an index, in the current transaction
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_xact_tuples_inserted</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of rows inserted into table, in the current transaction
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_xact_tuples_updated</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of rows updated in table (includes HOT updates), in the current transaction
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_xact_tuples_deleted</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of rows deleted from table, in the current transaction
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_xact_tuples_hot_updated</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of rows HOT-updated in table, in the current transaction
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_xact_blocks_fetched</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of disk block fetch requests for table or index, in the current transaction
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_xact_blocks_hit</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of disk block requests found in cache for table or index, in the current transaction
- </entry>
- </row>
<row>
<!-- See also the entry for this in func.sgml -->
</entry>
</row>
- <row>
- <entry><literal><function>pg_stat_get_function_calls</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of times the function has been called
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_function_time</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Total wall clock time spent in the function, in microseconds. Includes
- the time spent in functions called by this one.
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_function_self_time</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Time spent in only this function. Time spent in called functions
- is excluded.
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_xact_function_calls</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of times the function has been called, in the current transaction.
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_xact_function_time</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Total wall clock time spent in the function, in microseconds, in the
- current transaction. Includes the time spent in functions called by
- this one.
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_xact_function_self_time</function>(<type>oid</type>)</literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Time spent in only this function, in the current transaction. Time
- spent in called functions is excluded.
- </entry>
- </row>
-
<row>
<entry><literal><function>pg_stat_get_backend_idset()</function></literal></entry>
<entry><type>setof integer</type></entry>
</entry>
</row>
- <row>
- <entry><literal><function>pg_stat_get_backend_pid</function>(<type>integer</type>)</literal></entry>
- <entry><type>integer</type></entry>
- <entry>
- Process ID of the given server process
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_backend_dbid</function>(<type>integer</type>)</literal></entry>
- <entry><type>oid</type></entry>
- <entry>
- Database ID of the given server process
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_backend_userid</function>(<type>integer</type>)</literal></entry>
- <entry><type>oid</type></entry>
- <entry>
- User ID of the given server process
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_backend_activity</function>(<type>integer</type>)</literal></entry>
- <entry><type>text</type></entry>
- <entry>
- Active command of the given server process, but only if the
- current user is a superuser or the same user as that of
- the session being queried (and
- <varname>track_activities</varname> is on)
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_backend_waiting</function>(<type>integer</type>)</literal></entry>
- <entry><type>boolean</type></entry>
- <entry>
- True if the given server process is waiting for a lock,
- but only if the current user is a superuser or the same user as that of
- the session being queried (and
- <varname>track_activities</varname> is on)
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_backend_activity_start</function>(<type>integer</type>)</literal></entry>
- <entry><type>timestamp with time zone</type></entry>
- <entry>
- The time at which the given server process' currently
- executing query was started, but only if the
- current user is a superuser or the same user as that of
- the session being queried (and
- <varname>track_activities</varname> is on)
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_backend_xact_start</function>(<type>integer</type>)</literal></entry>
- <entry><type>timestamp with time zone</type></entry>
- <entry>
- The time at which the given server process' currently
- executing transaction was started, but only if the
- current user is a superuser or the same user as that of
- the session being queried (and
- <varname>track_activities</varname> is on)
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_backend_start</function>(<type>integer</type>)</literal></entry>
- <entry><type>timestamp with time zone</type></entry>
- <entry>
- The time at which the given server process was started, or
- null if the current user is not a superuser nor the same user
- as that of the session being queried
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_backend_client_addr</function>(<type>integer</type>)</literal></entry>
- <entry><type>inet</type></entry>
- <entry>
- The IP address of the client connected to the given
- server process; null if the connection is over a Unix domain
- socket, also null if the current user is not a superuser nor
- the same user as that of the session being queried
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_backend_client_port</function>(<type>integer</type>)</literal></entry>
- <entry><type>integer</type></entry>
- <entry>
- The TCP port number of the client connected to the given
- server process; -1 if the connection is over a Unix domain
- socket, null if the current user is not a superuser nor the
- same user as that of the session being queried
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_bgwriter_timed_checkpoints()</function></literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of times the background writer has started timed checkpoints
- (because the <varname>checkpoint_timeout</varname> time has expired)
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_bgwriter_requested_checkpoints()</function></literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of times the background writer has started checkpoints based
- on requests from backends because the <varname>checkpoint_segments</varname>
- has been exceeded or because the <command>CHECKPOINT</command>
- command has been issued
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_bgwriter_buf_written_checkpoints()</function></literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of buffers written by the background writer during checkpoints
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_bgwriter_buf_written_clean()</function></literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of buffers written by the background writer for routine cleaning of
- dirty pages
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_bgwriter_maxwritten_clean()</function></literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of times the background writer has stopped its cleaning scan because
- it has written more buffers than specified in the
- <varname>bgwriter_lru_maxpages</varname> parameter
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_bgwriter_stat_reset_time()</function></literal></entry>
- <entry><type>timestamptz</type></entry>
- <entry>
- Time of the last statistics reset for the background writer, updated
- when executing <function>pg_stat_reset_shared('bgwriter')</function>
- on the database cluster.
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_buf_written_backend()</function></literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Number of buffers written by backends because they needed
- to allocate a new buffer
- </entry>
- </row>
-
- <row>
- <entry><literal><function>pg_stat_get_buf_alloc()</function></literal></entry>
- <entry><type>bigint</type></entry>
- <entry>
- Total number of buffer allocations
- </entry>
- </row>
<row>
<entry><literal><function>pg_stat_get_wal_senders()</function></literal></entry>
</tgroup>
</table>
- <note>
- <para>
- <function>pg_stat_get_blocks_fetched</function> minus
- <function>pg_stat_get_blocks_hit</function> gives the number of kernel
- <function>read()</> calls issued for the table, index, or
- database; the number of actual physical reads is usually
- lower due to kernel-level buffering. The <literal>*_blks_read</>
- statistics columns use this subtraction, i.e., fetched minus hit.
- </para>
- </note>
-
- <para>
- All functions to access information about backends are indexed by backend id
- number, except <function>pg_stat_get_activity</function> which is indexed by PID.
- The function <function>pg_stat_get_backend_idset</function> provides
- a convenient way to generate one row for each active server process. For
- example, to show the <acronym>PID</>s and current queries of all server processes:
-
-<programlisting>
-SELECT pg_stat_get_backend_pid(s.backendid) AS pid,
- pg_stat_get_backend_activity(s.backendid) AS query
- FROM (SELECT pg_stat_get_backend_idset() AS backendid) AS s;
-</programlisting>
- </para>
-
</sect3>
</sect2>
</sect1>
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