*
* vacuumdb
*
- * Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1996-2015, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/bin/scripts/vacuumdb.c,v 1.32 2010/01/07 12:38:55 momjian Exp $
+ * src/bin/scripts/vacuumdb.c
*
*-------------------------------------------------------------------------
*/
#include "postgres_fe.h"
+
#include "common.h"
+#include "dumputils.h"
+
+
+#define ERRCODE_UNDEFINED_TABLE "42P01"
+
+/* Parallel vacuuming stuff */
+typedef struct ParallelSlot
+{
+ PGconn *connection;
+ pgsocket sock;
+ bool isFree;
+} ParallelSlot;
+
+/* vacuum options controlled by user flags */
+typedef struct vacuumingOptions
+{
+ bool analyze_only;
+ bool verbose;
+ bool and_analyze;
+ bool full;
+ bool freeze;
+} vacuumingOptions;
-static void vacuum_one_database(const char *dbname, bool full, bool inplace, bool verbose,
- bool and_analyze, bool analyze_only, bool freeze,
- const char *table, const char *host, const char *port,
+static void vacuum_one_database(const char *dbname, vacuumingOptions *vacopts,
+ int stage,
+ SimpleStringList *tables,
+ const char *host, const char *port,
const char *username, enum trivalue prompt_password,
- const char *progname, bool echo);
-static void vacuum_all_databases(bool full, bool inplace, bool verbose, bool and_analyze,
- bool analyze_only, bool freeze,
+ int concurrentCons,
+ const char *progname, bool echo, bool quiet);
+
+static void vacuum_all_databases(vacuumingOptions *vacopts,
+ bool analyze_in_stages,
+ const char *maintenance_db,
const char *host, const char *port,
const char *username, enum trivalue prompt_password,
+ int concurrentCons,
const char *progname, bool echo, bool quiet);
+static void prepare_vacuum_command(PQExpBuffer sql, PGconn *conn,
+ vacuumingOptions *vacopts, const char *table);
+
+static void run_vacuum_command(PGconn *conn, const char *sql, bool echo,
+ const char *dbname, const char *table,
+ const char *progname, bool async);
+
+static ParallelSlot *GetIdleSlot(ParallelSlot slots[], int numslots,
+ const char *dbname, const char *progname);
+
+static bool GetQueryResult(PGconn *conn, const char *dbname,
+ const char *progname);
+
+static void DisconnectDatabase(ParallelSlot *slot);
+
+static int select_loop(int maxFd, fd_set *workerset, bool *aborting);
+
+static void init_slot(ParallelSlot *slot, PGconn *conn);
+
static void help(const char *progname);
+/* For analyze-in-stages mode */
+#define ANALYZE_NO_STAGE -1
+#define ANALYZE_NUM_STAGES 3
+
int
main(int argc, char *argv[])
{"quiet", no_argument, NULL, 'q'},
{"dbname", required_argument, NULL, 'd'},
{"analyze", no_argument, NULL, 'z'},
- {"analyze-only", no_argument, NULL, 'o'},
+ {"analyze-only", no_argument, NULL, 'Z'},
{"freeze", no_argument, NULL, 'F'},
{"all", no_argument, NULL, 'a'},
{"table", required_argument, NULL, 't'},
{"full", no_argument, NULL, 'f'},
{"verbose", no_argument, NULL, 'v'},
- {"inplace", no_argument, NULL, 'i'},
+ {"jobs", required_argument, NULL, 'j'},
+ {"maintenance-db", required_argument, NULL, 2},
+ {"analyze-in-stages", no_argument, NULL, 3},
{NULL, 0, NULL, 0}
};
const char *progname;
int optindex;
int c;
-
const char *dbname = NULL;
+ const char *maintenance_db = NULL;
char *host = NULL;
char *port = NULL;
char *username = NULL;
enum trivalue prompt_password = TRI_DEFAULT;
bool echo = false;
bool quiet = false;
- bool and_analyze = false;
- bool analyze_only = false;
- bool freeze = false;
+ vacuumingOptions vacopts;
+ bool analyze_in_stages = false;
bool alldb = false;
- char *table = NULL;
- bool full = false;
- bool verbose = false;
- bool inplace = false;
+ SimpleStringList tables = {NULL, NULL};
+ int concurrentCons = 1;
+ int tbl_count = 0;
+
+ /* initialize options to all false */
+ memset(&vacopts, 0, sizeof(vacopts));
progname = get_progname(argv[0]);
+
set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("pgscripts"));
handle_help_version_opts(argc, argv, "vacuumdb", help);
- while ((c = getopt_long(argc, argv, "h:p:U:wWeqd:zaFt:fiv", long_options, &optindex)) != -1)
+ while ((c = getopt_long(argc, argv, "h:p:U:wWeqd:zZFat:fvj:", long_options, &optindex)) != -1)
{
switch (c)
{
case 'h':
- host = optarg;
+ host = pg_strdup(optarg);
break;
case 'p':
- port = optarg;
+ port = pg_strdup(optarg);
break;
case 'U':
- username = optarg;
+ username = pg_strdup(optarg);
break;
case 'w':
prompt_password = TRI_NO;
quiet = true;
break;
case 'd':
- dbname = optarg;
+ dbname = pg_strdup(optarg);
break;
case 'z':
- and_analyze = true;
+ vacopts.and_analyze = true;
break;
- case 'o':
- analyze_only = true;
+ case 'Z':
+ vacopts.analyze_only = true;
break;
case 'F':
- freeze = true;
+ vacopts.freeze = true;
break;
case 'a':
alldb = true;
break;
case 't':
- table = optarg;
- break;
+ {
+ simple_string_list_append(&tables, optarg);
+ tbl_count++;
+ break;
+ }
case 'f':
- full = true;
- break;
- case 'i':
- inplace = true;
+ vacopts.full = true;
break;
case 'v':
- verbose = true;
+ vacopts.verbose = true;
+ break;
+ case 'j':
+ concurrentCons = atoi(optarg);
+ if (concurrentCons <= 0)
+ {
+ fprintf(stderr, _("%s: number of parallel \"jobs\" must be at least 1\n"),
+ progname);
+ exit(1);
+ }
+ if (concurrentCons > FD_SETSIZE - 1)
+ {
+ fprintf(stderr, _("%s: too many parallel jobs requested (maximum: %d)\n"),
+ progname, FD_SETSIZE - 1);
+ exit(1);
+ }
+ break;
+ case 2:
+ maintenance_db = pg_strdup(optarg);
+ break;
+ case 3:
+ analyze_in_stages = vacopts.analyze_only = true;
break;
default:
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
}
}
- switch (argc - optind)
+ /*
+ * Non-option argument specifies database name as long as it wasn't
+ * already specified with -d / --dbname
+ */
+ if (optind < argc && dbname == NULL)
{
- case 0:
- break;
- case 1:
- dbname = argv[optind];
- break;
- default:
- fprintf(stderr, _("%s: too many command-line arguments (first is \"%s\")\n"),
- progname, argv[optind + 1]);
- fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
- exit(1);
+ dbname = argv[optind];
+ optind++;
}
- if (inplace && !full)
+ if (optind < argc)
{
- fprintf(stderr, _("%s: cannot use the \"inplace\" option when performing full vacuum\n"),
- progname);
+ fprintf(stderr, _("%s: too many command-line arguments (first is \"%s\")\n"),
+ progname, argv[optind]);
+ fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname);
exit(1);
}
- if (analyze_only)
+ if (vacopts.analyze_only)
{
- if (full)
+ if (vacopts.full)
{
- fprintf(stderr, _("%s: cannot use the \"full\" option when performing only analyze\n"),
- progname);
+ fprintf(stderr, _("%s: cannot use the \"%s\" option when performing only analyze\n"),
+ progname, "full");
exit(1);
}
- if (freeze)
+ if (vacopts.freeze)
{
- fprintf(stderr, _("%s: cannot use the \"freeze\" option when performing only analyze\n"),
- progname);
+ fprintf(stderr, _("%s: cannot use the \"%s\" option when performing only analyze\n"),
+ progname, "freeze");
exit(1);
}
/* allow 'and_analyze' with 'analyze_only' */
setup_cancel_handler();
+ /* Avoid opening extra connections. */
+ if (tbl_count && (concurrentCons > tbl_count))
+ concurrentCons = tbl_count;
+
if (alldb)
{
if (dbname)
progname);
exit(1);
}
- if (table)
+ if (tables.head != NULL)
{
- fprintf(stderr, _("%s: cannot vacuum a specific table in all databases\n"),
+ fprintf(stderr, _("%s: cannot vacuum specific table(s) in all databases\n"),
progname);
exit(1);
}
- vacuum_all_databases(full, inplace, verbose, and_analyze, analyze_only, freeze,
+ vacuum_all_databases(&vacopts,
+ analyze_in_stages,
+ maintenance_db,
host, port, username, prompt_password,
+ concurrentCons,
progname, echo, quiet);
}
else
else if (getenv("PGUSER"))
dbname = getenv("PGUSER");
else
- dbname = get_user_name(progname);
+ dbname = get_user_name_or_exit(progname);
}
- vacuum_one_database(dbname, full, inplace, verbose, and_analyze, analyze_only,
- freeze, table,
- host, port, username, prompt_password,
- progname, echo);
+ if (analyze_in_stages)
+ {
+ int stage;
+
+ for (stage = 0; stage < ANALYZE_NUM_STAGES; stage++)
+ {
+ vacuum_one_database(dbname, &vacopts,
+ stage,
+ &tables,
+ host, port, username, prompt_password,
+ concurrentCons,
+ progname, echo, quiet);
+ }
+ }
+ else
+ vacuum_one_database(dbname, &vacopts,
+ ANALYZE_NO_STAGE,
+ &tables,
+ host, port, username, prompt_password,
+ concurrentCons,
+ progname, echo, quiet);
}
exit(0);
}
-
+/*
+ * vacuum_one_database
+ *
+ * Process tables in the given database. If the 'tables' list is empty,
+ * process all tables in the database.
+ *
+ * Note that this function is only concerned with running exactly one stage
+ * when in analyze-in-stages mode; caller must iterate on us if necessary.
+ *
+ * If concurrentCons is > 1, multiple connections are used to vacuum tables
+ * in parallel. In this case and if the table list is empty, we first obtain
+ * a list of tables from the database.
+ */
static void
-vacuum_one_database(const char *dbname, bool full, bool inplace, bool verbose, bool and_analyze,
- bool analyze_only, bool freeze, const char *table,
+vacuum_one_database(const char *dbname, vacuumingOptions *vacopts,
+ int stage,
+ SimpleStringList *tables,
const char *host, const char *port,
const char *username, enum trivalue prompt_password,
- const char *progname, bool echo)
+ int concurrentCons,
+ const char *progname, bool echo, bool quiet)
{
PQExpBufferData sql;
-
PGconn *conn;
+ SimpleStringListCell *cell;
+ ParallelSlot *slots = NULL;
+ SimpleStringList dbtables = {NULL, NULL};
+ int i;
+ bool result = 0;
+ bool parallel = concurrentCons > 1;
+ const char *stage_commands[] = {
+ "SET default_statistics_target=1; SET vacuum_cost_delay=0;",
+ "SET default_statistics_target=10; RESET vacuum_cost_delay;",
+ "RESET default_statistics_target;"
+ };
+ const char *stage_messages[] = {
+ gettext_noop("Generating minimal optimizer statistics (1 target)"),
+ gettext_noop("Generating medium optimizer statistics (10 targets)"),
+ gettext_noop("Generating default (full) optimizer statistics")
+ };
+
+ Assert(stage == ANALYZE_NO_STAGE ||
+ (stage >= 0 && stage < ANALYZE_NUM_STAGES));
+
+ if (!quiet)
+ {
+ if (stage != ANALYZE_NO_STAGE)
+ printf(_("%s: processing database \"%s\": %s\n"), progname, dbname,
+ stage_messages[stage]);
+ else
+ printf(_("%s: vacuuming database \"%s\"\n"), progname, dbname);
+ fflush(stdout);
+ }
+
+ conn = connectDatabase(dbname, host, port, username, prompt_password,
+ progname, false);
initPQExpBuffer(&sql);
- conn = connectDatabase(dbname, host, port, username, prompt_password, progname);
+ /*
+ * If a table list is not provided and we're using multiple connections,
+ * prepare the list of tables by querying the catalogs.
+ */
+ if (parallel && (!tables || !tables->head))
+ {
+ PQExpBufferData buf;
+ PGresult *res;
+ int ntups;
+ int i;
- if (analyze_only)
+ initPQExpBuffer(&buf);
+
+ res = executeQuery(conn,
+ "SELECT c.relname, ns.nspname FROM pg_class c, pg_namespace ns\n"
+ " WHERE relkind IN (\'r\', \'m\') AND c.relnamespace = ns.oid\n"
+ " ORDER BY c.relpages DESC;",
+ progname, echo);
+
+ ntups = PQntuples(res);
+ for (i = 0; i < ntups; i++)
+ {
+ appendPQExpBuffer(&buf, "%s",
+ fmtQualifiedId(PQserverVersion(conn),
+ PQgetvalue(res, i, 1),
+ PQgetvalue(res, i, 0)));
+
+ simple_string_list_append(&dbtables, buf.data);
+ resetPQExpBuffer(&buf);
+ }
+
+ termPQExpBuffer(&buf);
+ tables = &dbtables;
+
+ /*
+ * If there are more connections than vacuumable relations, we don't
+ * need to use them all.
+ */
+ if (concurrentCons > ntups)
+ concurrentCons = ntups;
+ if (concurrentCons <= 1)
+ parallel = false;
+ }
+
+ /*
+ * Setup the database connections. We reuse the connection we already have
+ * for the first slot. If not in parallel mode, the first slot in the
+ * array contains the connection.
+ */
+ slots = (ParallelSlot *) pg_malloc(sizeof(ParallelSlot) * concurrentCons);
+ init_slot(slots, conn);
+ if (parallel)
+ {
+ for (i = 1; i < concurrentCons; i++)
+ {
+ conn = connectDatabase(dbname, host, port, username, prompt_password,
+ progname, false);
+ init_slot(slots + i, conn);
+ }
+ }
+
+ /*
+ * Prepare all the connections to run the appropriate analyze stage, if
+ * caller requested that mode.
+ */
+ if (stage != ANALYZE_NO_STAGE)
{
- appendPQExpBuffer(&sql, "ANALYZE");
- if (verbose)
- appendPQExpBuffer(&sql, " VERBOSE");
+ int j;
+
+ /* We already emitted the message above */
+
+ for (j = 0; j < concurrentCons; j++)
+ executeCommand((slots + j)->connection,
+ stage_commands[stage], progname, echo);
+ }
+
+ cell = tables ? tables->head : NULL;
+ do
+ {
+ ParallelSlot *free_slot;
+ const char *tabname = cell ? cell->val : NULL;
+
+ prepare_vacuum_command(&sql, conn, vacopts, tabname);
+
+ if (CancelRequested)
+ {
+ result = -1;
+ goto finish;
+ }
+
+ /*
+ * Get the connection slot to use. If in parallel mode, here we wait
+ * for one connection to become available if none already is. In
+ * non-parallel mode we simply use the only slot we have, which we
+ * know to be free.
+ */
+ if (parallel)
+ {
+ /*
+ * Get a free slot, waiting until one becomes free if none
+ * currently is.
+ */
+ free_slot = GetIdleSlot(slots, concurrentCons, dbname, progname);
+ if (!free_slot)
+ {
+ result = -1;
+ goto finish;
+ }
+
+ free_slot->isFree = false;
+ }
+ else
+ free_slot = slots;
+
+ run_vacuum_command(free_slot->connection, sql.data,
+ echo, dbname, tabname, progname, parallel);
+
+ if (cell)
+ cell = cell->next;
+ } while (cell != NULL);
+
+ if (parallel)
+ {
+ int j;
+
+ for (j = 0; j < concurrentCons; j++)
+ {
+ /* wait for all connection to return the results */
+ if (!GetQueryResult((slots + j)->connection, dbname, progname))
+ goto finish;
+
+ (slots + j)->isFree = true;
+ }
+ }
+
+finish:
+ for (i = 0; i < concurrentCons; i++)
+ DisconnectDatabase(slots + i);
+ pfree(slots);
+
+ termPQExpBuffer(&sql);
+
+ if (result == -1)
+ exit(1);
+}
+
+/*
+ * Vacuum/analyze all connectable databases.
+ *
+ * In analyze-in-stages mode, we process all databases in one stage before
+ * moving on to the next stage. That ensure minimal stats are available
+ * quickly everywhere before generating more detailed ones.
+ */
+static void
+vacuum_all_databases(vacuumingOptions *vacopts,
+ bool analyze_in_stages,
+ const char *maintenance_db, const char *host,
+ const char *port, const char *username,
+ enum trivalue prompt_password,
+ int concurrentCons,
+ const char *progname, bool echo, bool quiet)
+{
+ PGconn *conn;
+ PGresult *result;
+ int stage;
+ int i;
+
+ conn = connectMaintenanceDatabase(maintenance_db, host, port,
+ username, prompt_password, progname);
+ result = executeQuery(conn,
+ "SELECT datname FROM pg_database WHERE datallowconn ORDER BY 1;",
+ progname, echo);
+ PQfinish(conn);
+
+ if (analyze_in_stages)
+ {
+ /*
+ * When analyzing all databases in stages, we analyze them all in the
+ * fastest stage first, so that initial statistics become available
+ * for all of them as soon as possible.
+ *
+ * This means we establish several times as many connections, but
+ * that's a secondary consideration.
+ */
+ for (stage = 0; stage < ANALYZE_NUM_STAGES; stage++)
+ {
+ for (i = 0; i < PQntuples(result); i++)
+ {
+ const char *dbname;
+
+ dbname = PQgetvalue(result, i, 0);
+ vacuum_one_database(dbname, vacopts,
+ stage,
+ NULL,
+ host, port, username, prompt_password,
+ concurrentCons,
+ progname, echo, quiet);
+ }
+ }
+ }
+ else
+ {
+ for (i = 0; i < PQntuples(result); i++)
+ {
+ const char *dbname;
+
+ dbname = PQgetvalue(result, i, 0);
+ vacuum_one_database(dbname, vacopts,
+ ANALYZE_NO_STAGE,
+ NULL,
+ host, port, username, prompt_password,
+ concurrentCons,
+ progname, echo, quiet);
+ }
+ }
+
+ PQclear(result);
+}
+
+/*
+ * Construct a vacuum/analyze command to run based on the given options, in the
+ * given string buffer, which may contain previous garbage.
+ *
+ * An optional table name can be passed; this must be already be properly
+ * quoted. The command is semicolon-terminated.
+ */
+static void
+prepare_vacuum_command(PQExpBuffer sql, PGconn *conn, vacuumingOptions *vacopts,
+ const char *table)
+{
+ resetPQExpBuffer(sql);
+
+ if (vacopts->analyze_only)
+ {
+ appendPQExpBufferStr(sql, "ANALYZE");
+ if (vacopts->verbose)
+ appendPQExpBufferStr(sql, " VERBOSE");
}
else
{
- appendPQExpBuffer(&sql, "VACUUM");
- if (PQserverVersion(conn) >= 80500)
+ appendPQExpBufferStr(sql, "VACUUM");
+ if (PQserverVersion(conn) >= 90000)
{
const char *paren = " (";
const char *comma = ", ";
const char *sep = paren;
- if (full)
+ if (vacopts->full)
{
- appendPQExpBuffer(&sql, "%sFULL%s", sep,
- inplace ? " INPLACE" : "");
+ appendPQExpBuffer(sql, "%sFULL", sep);
sep = comma;
}
- if (freeze)
+ if (vacopts->freeze)
{
- appendPQExpBuffer(&sql, "%sFREEZE", sep);
+ appendPQExpBuffer(sql, "%sFREEZE", sep);
sep = comma;
}
- if (verbose)
+ if (vacopts->verbose)
{
- appendPQExpBuffer(&sql, "%sVERBOSE", sep);
+ appendPQExpBuffer(sql, "%sVERBOSE", sep);
sep = comma;
}
- if (and_analyze)
+ if (vacopts->and_analyze)
{
- appendPQExpBuffer(&sql, "%sANALYZE", sep);
+ appendPQExpBuffer(sql, "%sANALYZE", sep);
sep = comma;
}
if (sep != paren)
- appendPQExpBuffer(&sql, ")");
+ appendPQExpBufferStr(sql, ")");
}
else
{
- /*
- * On older servers, VACUUM FULL is equivalent to VACUUM (FULL
- * INPLACE) on newer servers, so we can ignore 'inplace'.
- */
- if (full)
- appendPQExpBuffer(&sql, " FULL");
- if (freeze)
- appendPQExpBuffer(&sql, " FREEZE");
- if (verbose)
- appendPQExpBuffer(&sql, " VERBOSE");
- if (and_analyze)
- appendPQExpBuffer(&sql, " ANALYZE");
+ if (vacopts->full)
+ appendPQExpBufferStr(sql, " FULL");
+ if (vacopts->freeze)
+ appendPQExpBufferStr(sql, " FREEZE");
+ if (vacopts->verbose)
+ appendPQExpBufferStr(sql, " VERBOSE");
+ if (vacopts->and_analyze)
+ appendPQExpBufferStr(sql, " ANALYZE");
}
}
+
if (table)
- appendPQExpBuffer(&sql, " %s", table);
- appendPQExpBuffer(&sql, ";\n");
+ appendPQExpBuffer(sql, " %s", table);
+ appendPQExpBufferChar(sql, ';');
+}
- if (!executeMaintenanceCommand(conn, sql.data, echo))
+/*
+ * Execute a vacuum/analyze command to the server.
+ *
+ * Result status is checked only if 'async' is false.
+ */
+static void
+run_vacuum_command(PGconn *conn, const char *sql, bool echo,
+ const char *dbname, const char *table,
+ const char *progname, bool async)
+{
+ if (async)
+ {
+ if (echo)
+ printf("%s\n", sql);
+
+ PQsendQuery(conn, sql);
+ }
+ else if (!executeMaintenanceCommand(conn, sql, echo))
{
if (table)
- fprintf(stderr, _("%s: vacuuming of table \"%s\" in database \"%s\" failed: %s"),
+ fprintf(stderr,
+ _("%s: vacuuming of table \"%s\" in database \"%s\" failed: %s"),
progname, table, dbname, PQerrorMessage(conn));
else
fprintf(stderr, _("%s: vacuuming of database \"%s\" failed: %s"),
PQfinish(conn);
exit(1);
}
- PQfinish(conn);
- termPQExpBuffer(&sql);
}
+/*
+ * GetIdleSlot
+ * Return a connection slot that is ready to execute a command.
+ *
+ * We return the first slot we find that is marked isFree, if one is;
+ * otherwise, we loop on select() until one socket becomes available. When
+ * this happens, we read the whole set and mark as free all sockets that become
+ * available.
+ *
+ * Process the slot list, if any free slot is available then return the slotid
+ * else perform the select on all the socket's and wait until at least one slot
+ * becomes available.
+ *
+ * If an error occurs, NULL is returned.
+ */
+static ParallelSlot *
+GetIdleSlot(ParallelSlot slots[], int numslots, const char *dbname,
+ const char *progname)
+{
+ int i;
+ int firstFree = -1;
+ fd_set slotset;
+ pgsocket maxFd;
-static void
-vacuum_all_databases(bool full, bool inplace, bool verbose, bool and_analyze, bool analyze_only,
- bool freeze, const char *host, const char *port,
- const char *username, enum trivalue prompt_password,
- const char *progname, bool echo, bool quiet)
+ for (i = 0; i < numslots; i++)
+ if ((slots + i)->isFree)
+ return slots + i;
+
+ FD_ZERO(&slotset);
+
+ maxFd = slots->sock;
+ for (i = 0; i < numslots; i++)
+ {
+ FD_SET((slots + i)->sock, &slotset);
+ if ((slots + i)->sock > maxFd)
+ maxFd = (slots + i)->sock;
+ }
+
+ /*
+ * No free slot found, so wait until one of the connections has finished
+ * its task and return the available slot.
+ */
+ for (firstFree = -1; firstFree < 0;)
+ {
+ bool aborting;
+
+ SetCancelConn(slots->connection);
+ i = select_loop(maxFd, &slotset, &aborting);
+ ResetCancelConn();
+
+ if (aborting)
+ {
+ /*
+ * We set the cancel-receiving connection to the one in the zeroth
+ * slot above, so fetch the error from there.
+ */
+ GetQueryResult(slots->connection, dbname, progname);
+ return NULL;
+ }
+ Assert(i != 0);
+
+ for (i = 0; i < numslots; i++)
+ {
+ if (!FD_ISSET((slots + i)->sock, &slotset))
+ continue;
+
+ PQconsumeInput((slots + i)->connection);
+ if (PQisBusy((slots + i)->connection))
+ continue;
+
+ (slots + i)->isFree = true;
+
+ if (!GetQueryResult((slots + i)->connection, dbname, progname))
+ return NULL;
+
+ if (firstFree < 0)
+ firstFree = i;
+ }
+ }
+
+ return slots + firstFree;
+}
+
+/*
+ * GetQueryResult
+ *
+ * Process the query result. Returns true if there's no error, false
+ * otherwise -- but errors about trying to vacuum a missing relation are
+ * reported and subsequently ignored.
+ */
+static bool
+GetQueryResult(PGconn *conn, const char *dbname, const char *progname)
{
- PGconn *conn;
PGresult *result;
- int i;
- conn = connectDatabase("postgres", host, port, username, prompt_password, progname);
- result = executeQuery(conn, "SELECT datname FROM pg_database WHERE datallowconn ORDER BY 1;", progname, echo);
- PQfinish(conn);
+ SetCancelConn(conn);
+ while ((result = PQgetResult(conn)) != NULL)
+ {
+ /*
+ * If errors are found, report them. Errors about a missing table are
+ * harmless so we continue processing; but die for other errors.
+ */
+ if (PQresultStatus(result) != PGRES_COMMAND_OK)
+ {
+ char *sqlState = PQresultErrorField(result, PG_DIAG_SQLSTATE);
+
+ fprintf(stderr, _("%s: vacuuming of database \"%s\" failed: %s"),
+ progname, dbname, PQerrorMessage(conn));
- for (i = 0; i < PQntuples(result); i++)
+ if (sqlState && strcmp(sqlState, ERRCODE_UNDEFINED_TABLE) != 0)
+ {
+ PQclear(result);
+ return false;
+ }
+ }
+
+ PQclear(result);
+ }
+ ResetCancelConn();
+
+ return true;
+}
+
+/*
+ * DisconnectDatabase
+ * Disconnect the connection associated with the given slot
+ */
+static void
+DisconnectDatabase(ParallelSlot *slot)
+{
+ char errbuf[256];
+
+ if (!slot->connection)
+ return;
+
+ if (PQtransactionStatus(slot->connection) == PQTRANS_ACTIVE)
{
- char *dbname = PQgetvalue(result, i, 0);
+ PGcancel *cancel;
- if (!quiet)
+ if ((cancel = PQgetCancel(slot->connection)))
{
- printf(_("%s: vacuuming database \"%s\"\n"), progname, dbname);
- fflush(stdout);
+ PQcancel(cancel, errbuf, sizeof(errbuf));
+ PQfreeCancel(cancel);
}
+ }
+
+ PQfinish(slot->connection);
+ slot->connection = NULL;
+}
- vacuum_one_database(dbname, full, inplace, verbose, and_analyze, analyze_only,
- freeze, NULL, host, port, username, prompt_password,
- progname, echo);
+/*
+ * Loop on select() until a descriptor from the given set becomes readable.
+ *
+ * If we get a cancel request while we're waiting, we forego all further
+ * processing and set the *aborting flag to true. The return value must be
+ * ignored in this case. Otherwise, *aborting is set to false.
+ */
+static int
+select_loop(int maxFd, fd_set *workerset, bool *aborting)
+{
+ int i;
+ fd_set saveSet = *workerset;
+
+ if (CancelRequested)
+ {
+ *aborting = true;
+ return -1;
}
+ else
+ *aborting = false;
- PQclear(result);
+ for (;;)
+ {
+ /*
+ * On Windows, we need to check once in a while for cancel requests;
+ * on other platforms we rely on select() returning when interrupted.
+ */
+ struct timeval *tvp;
+#ifdef WIN32
+ struct timeval tv = {0, 1000000};
+
+ tvp = &tv;
+#else
+ tvp = NULL;
+#endif
+
+ *workerset = saveSet;
+ i = select(maxFd + 1, workerset, NULL, NULL, tvp);
+
+#ifdef WIN32
+ if (i == SOCKET_ERROR)
+ {
+ i = -1;
+
+ if (WSAGetLastError() == WSAEINTR)
+ errno = EINTR;
+ }
+#endif
+
+ if (i < 0 && errno == EINTR)
+ continue; /* ignore this */
+ if (i < 0 || CancelRequested)
+ *aborting = true; /* but not this */
+ if (i == 0)
+ continue; /* timeout (Win32 only) */
+ break;
+ }
+
+ return i;
}
+static void
+init_slot(ParallelSlot *slot, PGconn *conn)
+{
+ slot->connection = conn;
+ slot->isFree = true;
+ slot->sock = PQsocket(conn);
+}
static void
help(const char *progname)
printf(_(" -e, --echo show the commands being sent to the server\n"));
printf(_(" -f, --full do full vacuuming\n"));
printf(_(" -F, --freeze freeze row transaction information\n"));
- printf(_(" -i, --inplace do full inplace vacuuming\n"));
- printf(_(" -o, --analyze-only only update optimizer hints\n"));
printf(_(" -q, --quiet don't write any messages\n"));
- printf(_(" -t, --table='TABLE[(COLUMNS)]' vacuum specific table only\n"));
+ printf(_(" -t, --table='TABLE[(COLUMNS)]' vacuum specific table(s) only\n"));
printf(_(" -v, --verbose write a lot of output\n"));
- printf(_(" -z, --analyze update optimizer hints\n"));
- printf(_(" --help show this help, then exit\n"));
- printf(_(" --version output version information, then exit\n"));
+ printf(_(" -V, --version output version information, then exit\n"));
+ printf(_(" -z, --analyze update optimizer statistics\n"));
+ printf(_(" -Z, --analyze-only only update optimizer statistics\n"));
+ printf(_(" -j, --jobs=NUM use this many concurrent connections to vacuum\n"));
+ printf(_(" --analyze-in-stages only update optimizer statistics, in multiple\n"
+ " stages for faster results\n"));
+ printf(_(" -?, --help show this help, then exit\n"));
printf(_("\nConnection options:\n"));
printf(_(" -h, --host=HOSTNAME database server host or socket directory\n"));
printf(_(" -p, --port=PORT database server port\n"));
printf(_(" -U, --username=USERNAME user name to connect as\n"));
printf(_(" -w, --no-password never prompt for password\n"));
printf(_(" -W, --password force password prompt\n"));
+ printf(_(" --maintenance-db=DBNAME alternate maintenance database\n"));
printf(_("\nRead the description of the SQL command VACUUM for details.\n"));
printf(_("\nReport bugs to <pgsql-bugs@postgresql.org>.\n"));
}
projects / postgresql / blobdiff