* A simple benchmark program for PostgreSQL
* Originally written by Tatsuo Ishii and enhanced by many contributors.
*
- * $PostgreSQL: pgsql/contrib/pgbench/pgbench.c,v 1.81 2008/08/22 17:57:34 momjian Exp $
+ * $PostgreSQL: pgsql/contrib/pgbench/pgbench.c,v 1.82 2008/09/11 23:52:48 tgl Exp $
* Copyright (c) 2000-2008, PostgreSQL Global Development Group
* ALL RIGHTS RESERVED;
*
#include "postgres_fe.h"
#include "libpq-fe.h"
+#include "pqsignal.h"
#include <ctype.h>
#define FD_SETSIZE 1024
#include <win32.h>
#else
+#include <signal.h>
#include <sys/time.h>
#include <unistd.h>
#endif /* ! WIN32 */
#define MAXCLIENTS 1024
#endif
+#define DEFAULT_NXACTS 10 /* default nxacts */
+
int nclients = 1; /* default number of simulated clients */
-int nxacts = 10; /* default number of transactions per clients */
+int nxacts = 0; /* number of transactions per client */
+int duration = 0; /* duration in seconds */
/*
* scaling factor. for example, scale = 10 will make 1000000 tuples of
char *login = NULL;
char *dbName;
+volatile bool timer_exceeded = false; /* flag from signal handler */
+
/* variable definitions */
typedef struct
{
} Command;
Command **sql_files[MAX_FILES]; /* SQL script files */
-int num_files; /* its number */
+int num_files; /* number of script files */
/* default scenario */
static char *tpc_b = {
/* Connection overhead time */
static struct timeval conn_total_time = {0, 0};
+/* Function prototypes */
+static void setalarm(int seconds);
+
+
/* Calculate total time */
static void
addTime(struct timeval *t1, struct timeval *t2, struct timeval *result)
static void
usage(void)
{
- fprintf(stderr, "usage: pgbench [-h hostname][-p port][-c nclients][-t ntransactions][-s scaling_factor][-D varname=value][-n][-C][-v][-S][-N][-M querymode][-f filename][-l][-U login][-d][dbname]\n");
+ fprintf(stderr, "usage: pgbench [-h hostname][-p port][-c nclients][-t ntransactions | -T duration][-s scaling_factor][-D varname=value][-n][-C][-v][-S][-N][-M querymode][-f filename][-l][-U login][-d][dbname]\n");
fprintf(stderr, "(initialize mode): pgbench -i [-h hostname][-p port][-s scaling_factor] [-F fillfactor] [-U login][-d][dbname]\n");
}
st->con = NULL;
}
- if (++st->cnt >= nxacts)
+ ++st->cnt;
+ if ((st->cnt >= nxacts && duration <= 0) || timer_exceeded)
{
remains--; /* I've done */
if (st->con != NULL)
printf("scaling factor: %d\n", scale);
printf("query mode: %s\n", QUERYMODE[querymode]);
printf("number of clients: %d\n", nclients);
- printf("number of transactions per client: %d\n", nxacts);
- printf("number of transactions actually processed: %d/%d\n", normal_xacts, nxacts * nclients);
+ if (duration <= 0)
+ {
+ printf("number of transactions per client: %d\n", nxacts);
+ printf("number of transactions actually processed: %d/%d\n",
+ normal_xacts, nxacts * nclients);
+ }
+ else
+ {
+ printf("duration: %d s\n", duration);
+ printf("number of transactions actually processed: %d\n",
+ normal_xacts);
+ }
printf("tps = %f (including connections establishing)\n", t1);
printf("tps = %f (excluding connections establishing)\n", t2);
}
memset(state, 0, sizeof(*state));
- while ((c = getopt(argc, argv, "ih:nvp:dc:t:s:U:CNSlf:D:F:M:")) != -1)
+ while ((c = getopt(argc, argv, "ih:nvp:dSNc:Cs:t:T:U:lf:D:F:M:")) != -1)
{
switch (c)
{
}
break;
case 't':
+ if (duration > 0)
+ {
+ fprintf(stderr, "specify either a number of transactions (-t) or a duration (-T), not both.\n");
+ exit(1);
+ }
nxacts = atoi(optarg);
if (nxacts <= 0)
{
exit(1);
}
break;
+ case 'T':
+ if (nxacts > 0)
+ {
+ fprintf(stderr, "specify either a number of transactions (-t) or a duration (-T), not both.\n");
+ exit(1);
+ }
+ duration = atoi(optarg);
+ if (duration <= 0)
+ {
+ fprintf(stderr, "invalid duration: %d\n", duration);
+ exit(1);
+ }
+ break;
case 'U':
login = optarg;
break;
exit(0);
}
+ /* Use DEFAULT_NXACTS if neither nxacts nor duration is specified. */
+ if (nxacts <= 0 && duration <= 0)
+ nxacts = DEFAULT_NXACTS;
+
remains = nclients;
if (nclients > 1)
if (debug)
{
- printf("pghost: %s pgport: %s nclients: %d nxacts: %d dbName: %s\n",
+ if (duration <= 0)
+ printf("pghost: %s pgport: %s nclients: %d nxacts: %d dbName: %s\n",
pghost, pgport, nclients, nxacts, dbName);
+ else
+ printf("pghost: %s pgport: %s nclients: %d duration: %d dbName: %s\n",
+ pghost, pgport, nclients, duration, dbName);
}
/* opening connection... */
/* get start up time */
gettimeofday(&start_time, NULL);
+ /* set alarm if duration is specified. */
+ if (duration > 0)
+ setalarm(duration);
+
if (is_connect == 0)
{
struct timeval t, now;
}
}
}
+
+
+/*
+ * Support for duration option: set timer_exceeded after so many seconds.
+ */
+
+#ifndef WIN32
+
+static void
+handle_sig_alarm(SIGNAL_ARGS)
+{
+ timer_exceeded = true;
+}
+
+static void
+setalarm(int seconds)
+{
+ pqsignal(SIGALRM, handle_sig_alarm);
+ alarm(seconds);
+}
+
+#else /* WIN32 */
+
+static VOID CALLBACK
+win32_timer_callback(PVOID lpParameter, BOOLEAN TimerOrWaitFired)
+{
+ timer_exceeded = true;
+}
+
+static void
+setalarm(int seconds)
+{
+ HANDLE queue;
+ HANDLE timer;
+
+ /* This function will be called at most once, so we can cheat a bit. */
+ queue = CreateTimerQueue();
+ if (seconds > ((DWORD)-1) / 1000 ||
+ !CreateTimerQueueTimer(&timer, queue,
+ win32_timer_callback, NULL, seconds * 1000, 0,
+ WT_EXECUTEINTIMERTHREAD | WT_EXECUTEONLYONCE))
+ {
+ fprintf(stderr, "Failed to set timer\n");
+ exit(1);
+ }
+}
+
+#endif /* WIN32 */
-<!-- $PostgreSQL: pgsql/doc/src/sgml/pgbench.sgml,v 1.6 2008/03/19 03:33:21 ishii Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/pgbench.sgml,v 1.7 2008/09/11 23:52:48 tgl Exp $ -->
<sect1 id="pgbench">
<title>pgbench</title>
The first four lines just report some of the most important parameter
settings. The next line reports the number of transactions completed
and intended (the latter being just the product of number of clients
- and number of transactions); these will be equal unless the run
+ and number of transactions per client); these will be equal unless the run
failed before completion. The last two lines report the TPS rate,
figured with and without counting the time to start database sessions.
</para>
In nearly all cases, you'll need some options to make a useful test.
The most important options are <literal>-c</> (number of clients),
- <literal>-t</> (number of transactions), and <literal>-f</> (specify
- a custom script file). See below for a full list.
+ <literal>-t</> (number of transactions), <literal>-T</> (time limit),
+ and <literal>-f</> (specify a custom script file).
+ See below for a full list.
</para>
<para>
Number of transactions each client runs. Default is 10.
</entry>
</row>
+ <row>
+ <entry><literal>-T</literal> <replaceable>seconds</></entry>
+ <entry>
+ Duration of benchmark test in seconds. <literal>-t</literal> and
+ <literal>-T</literal> are mutually exclusive.
+ </entry>
+ </row>
<row>
<entry><literal>-M</literal> <replaceable>querymode</></entry>
<entry>
- Choose the query mode from the follows. default is simple.
+ Protocol to use for submitting queries for the server:
<itemizedlist>
<listitem>
- <para>simple: using simple query protocol.</para>
+ <para><literal>simple</>: use simple query protocol.</para>
</listitem>
<listitem>
- <para>extended: using extended protocol.</para>
+ <para><literal>extended</>: use extended query protocol.</para>
</listitem>
<listitem>
- <para>prepared: using extended protocol with prepared statements.</para>
+ <para><literal>prepared</>: use extended query protocol with prepared statements.</para>
</listitem>
</itemizedlist>
+ The default is simple query protocol. (See <xref linkend="protocol">
+ for more information.)
</entry>
</row>
<row>
<para>
In the first place, <emphasis>never</> believe any test that runs
- for only a few seconds. Increase the <literal>-t</> setting enough
+ for only a few seconds. Use the <literal>-t</> or <literal>-T</> option
to make the run last at least a few minutes, so as to average out noise.
In some cases you could need hours to get numbers that are reproducible.
It's a good idea to try the test run a few times, to find out if your
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