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Add a duration option to pgbench, so that test length can be specified in seconds
instead of by number of transactions to run. Takahiro Itagaki
This commit is contained in:
Tom Lane
parent
06edce4c3f
commit
cff4aa6ad6
@ -4,7 +4,7 @@
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* A simple benchmark program for PostgreSQL
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* Originally written by Tatsuo Ishii and enhanced by many contributors.
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*
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* $PostgreSQL: pgsql/contrib/pgbench/pgbench.c,v 1.81 2008/08/22 17:57:34 momjian Exp $
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* $PostgreSQL: pgsql/contrib/pgbench/pgbench.c,v 1.82 2008/09/11 23:52:48 tgl Exp $
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* Copyright (c) 2000-2008, PostgreSQL Global Development Group
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* ALL RIGHTS RESERVED;
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*
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@ -29,6 +29,7 @@
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#include "postgres_fe.h"
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#include "libpq-fe.h"
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#include "pqsignal.h"
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#include <ctype.h>
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@ -37,6 +38,7 @@
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#define FD_SETSIZE 1024
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#include <win32.h>
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#else
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#include <signal.h>
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#include <sys/time.h>
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#include <unistd.h>
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#endif /* ! WIN32 */
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@ -67,8 +69,11 @@ extern int optind;
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#define MAXCLIENTS 1024
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#endif
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#define DEFAULT_NXACTS 10 /* default nxacts */
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int nclients = 1; /* default number of simulated clients */
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int nxacts = 10; /* default number of transactions per clients */
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int nxacts = 0; /* number of transactions per client */
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int duration = 0; /* duration in seconds */
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/*
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* scaling factor. for example, scale = 10 will make 1000000 tuples of
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@ -105,6 +110,8 @@ char *pgtty = NULL;
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char *login = NULL;
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char *dbName;
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volatile bool timer_exceeded = false; /* flag from signal handler */
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/* variable definitions */
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typedef struct
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{
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@ -162,7 +169,7 @@ typedef struct
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} Command;
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Command **sql_files[MAX_FILES]; /* SQL script files */
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int num_files; /* its number */
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int num_files; /* number of script files */
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/* default scenario */
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static char *tpc_b = {
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@ -208,6 +215,10 @@ static char *select_only = {
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/* Connection overhead time */
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static struct timeval conn_total_time = {0, 0};
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/* Function prototypes */
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static void setalarm(int seconds);
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/* Calculate total time */
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static void
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addTime(struct timeval *t1, struct timeval *t2, struct timeval *result)
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@ -241,7 +252,7 @@ diffTime(struct timeval *t1, struct timeval *t2, struct timeval *result)
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static void
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usage(void)
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{
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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");
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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");
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fprintf(stderr, "(initialize mode): pgbench -i [-h hostname][-p port][-s scaling_factor] [-F fillfactor] [-U login][-d][dbname]\n");
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}
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@ -630,7 +641,8 @@ top:
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st->con = NULL;
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}
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if (++st->cnt >= nxacts)
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++st->cnt;
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if ((st->cnt >= nxacts && duration <= 0) || timer_exceeded)
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{
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remains--; /* I've done */
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if (st->con != NULL)
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@ -1434,8 +1446,18 @@ printResults(
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printf("scaling factor: %d\n", scale);
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printf("query mode: %s\n", QUERYMODE[querymode]);
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printf("number of clients: %d\n", nclients);
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printf("number of transactions per client: %d\n", nxacts);
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printf("number of transactions actually processed: %d/%d\n", normal_xacts, nxacts * nclients);
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if (duration <= 0)
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{
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printf("number of transactions per client: %d\n", nxacts);
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printf("number of transactions actually processed: %d/%d\n",
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normal_xacts, nxacts * nclients);
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}
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else
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{
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printf("duration: %d s\n", duration);
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printf("number of transactions actually processed: %d\n",
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normal_xacts);
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}
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printf("tps = %f (including connections establishing)\n", t1);
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printf("tps = %f (excluding connections establishing)\n", t2);
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}
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@ -1499,7 +1521,7 @@ main(int argc, char **argv)
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memset(state, 0, sizeof(*state));
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while ((c = getopt(argc, argv, "ih:nvp:dc:t:s:U:CNSlf:D:F:M:")) != -1)
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while ((c = getopt(argc, argv, "ih:nvp:dSNc:Cs:t:T:U:lf:D:F:M:")) != -1)
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{
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switch (c)
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{
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@ -1565,6 +1587,11 @@ main(int argc, char **argv)
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}
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break;
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case 't':
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if (duration > 0)
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{
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fprintf(stderr, "specify either a number of transactions (-t) or a duration (-T), not both.\n");
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exit(1);
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}
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nxacts = atoi(optarg);
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if (nxacts <= 0)
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{
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@ -1572,6 +1599,19 @@ main(int argc, char **argv)
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exit(1);
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}
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break;
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case 'T':
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if (nxacts > 0)
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{
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fprintf(stderr, "specify either a number of transactions (-t) or a duration (-T), not both.\n");
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exit(1);
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}
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duration = atoi(optarg);
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if (duration <= 0)
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{
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fprintf(stderr, "invalid duration: %d\n", duration);
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exit(1);
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}
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break;
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case 'U':
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login = optarg;
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break;
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@ -1650,6 +1690,10 @@ main(int argc, char **argv)
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exit(0);
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}
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/* Use DEFAULT_NXACTS if neither nxacts nor duration is specified. */
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if (nxacts <= 0 && duration <= 0)
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nxacts = DEFAULT_NXACTS;
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remains = nclients;
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if (nclients > 1)
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@ -1695,8 +1739,12 @@ main(int argc, char **argv)
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if (debug)
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{
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printf("pghost: %s pgport: %s nclients: %d nxacts: %d dbName: %s\n",
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if (duration <= 0)
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printf("pghost: %s pgport: %s nclients: %d nxacts: %d dbName: %s\n",
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pghost, pgport, nclients, nxacts, dbName);
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else
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printf("pghost: %s pgport: %s nclients: %d duration: %d dbName: %s\n",
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pghost, pgport, nclients, duration, dbName);
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}
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/* opening connection... */
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@ -1779,6 +1827,10 @@ main(int argc, char **argv)
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/* get start up time */
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gettimeofday(&start_time, NULL);
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/* set alarm if duration is specified. */
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if (duration > 0)
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setalarm(duration);
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if (is_connect == 0)
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{
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struct timeval t, now;
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@ -1951,3 +2003,51 @@ main(int argc, char **argv)
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}
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}
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}
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/*
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* Support for duration option: set timer_exceeded after so many seconds.
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*/
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#ifndef WIN32
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static void
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handle_sig_alarm(SIGNAL_ARGS)
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{
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timer_exceeded = true;
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}
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static void
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setalarm(int seconds)
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{
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pqsignal(SIGALRM, handle_sig_alarm);
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alarm(seconds);
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}
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#else /* WIN32 */
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static VOID CALLBACK
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win32_timer_callback(PVOID lpParameter, BOOLEAN TimerOrWaitFired)
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{
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timer_exceeded = true;
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}
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static void
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setalarm(int seconds)
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{
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HANDLE queue;
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HANDLE timer;
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/* This function will be called at most once, so we can cheat a bit. */
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queue = CreateTimerQueue();
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if (seconds > ((DWORD)-1) / 1000 ||
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!CreateTimerQueueTimer(&timer, queue,
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win32_timer_callback, NULL, seconds * 1000, 0,
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WT_EXECUTEINTIMERTHREAD | WT_EXECUTEONLYONCE))
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{
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fprintf(stderr, "Failed to set timer\n");
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exit(1);
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}
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}
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#endif /* WIN32 */
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@ -1,4 +1,4 @@
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<!-- $PostgreSQL: pgsql/doc/src/sgml/pgbench.sgml,v 1.6 2008/03/19 03:33:21 ishii Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/pgbench.sgml,v 1.7 2008/09/11 23:52:48 tgl Exp $ -->
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<sect1 id="pgbench">
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<title>pgbench</title>
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@ -35,7 +35,7 @@ tps = 85.296346 (excluding connections establishing)
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The first four lines just report some of the most important parameter
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settings. The next line reports the number of transactions completed
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and intended (the latter being just the product of number of clients
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and number of transactions); these will be equal unless the run
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and number of transactions per client); these will be equal unless the run
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failed before completion. The last two lines report the TPS rate,
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figured with and without counting the time to start database sessions.
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</para>
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@ -99,8 +99,9 @@ pgbench <optional> <replaceable>options</> </optional> <replaceable>dbname</>
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In nearly all cases, you'll need some options to make a useful test.
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The most important options are <literal>-c</> (number of clients),
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<literal>-t</> (number of transactions), and <literal>-f</> (specify
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a custom script file). See below for a full list.
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<literal>-t</> (number of transactions), <literal>-T</> (time limit),
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and <literal>-f</> (specify a custom script file).
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See below for a full list.
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</para>
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<para>
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@ -173,21 +174,30 @@ pgbench <optional> <replaceable>options</> </optional> <replaceable>dbname</>
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Number of transactions each client runs. Default is 10.
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</entry>
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</row>
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<row>
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<entry><literal>-T</literal> <replaceable>seconds</></entry>
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<entry>
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Duration of benchmark test in seconds. <literal>-t</literal> and
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<literal>-T</literal> are mutually exclusive.
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</entry>
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</row>
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<row>
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<entry><literal>-M</literal> <replaceable>querymode</></entry>
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<entry>
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Choose the query mode from the follows. default is simple.
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Protocol to use for submitting queries for the server:
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<itemizedlist>
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<listitem>
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<para>simple: using simple query protocol.</para>
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<para><literal>simple</>: use simple query protocol.</para>
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</listitem>
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<listitem>
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<para>extended: using extended protocol.</para>
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<para><literal>extended</>: use extended query protocol.</para>
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</listitem>
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<listitem>
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<para>prepared: using extended protocol with prepared statements.</para>
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<para><literal>prepared</>: use extended query protocol with prepared statements.</para>
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</listitem>
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</itemizedlist>
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The default is simple query protocol. (See <xref linkend="protocol">
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for more information.)
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</entry>
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</row>
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<row>
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@ -515,7 +525,7 @@ END;
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<para>
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In the first place, <emphasis>never</> believe any test that runs
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for only a few seconds. Increase the <literal>-t</> setting enough
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for only a few seconds. Use the <literal>-t</> or <literal>-T</> option
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to make the run last at least a few minutes, so as to average out noise.
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In some cases you could need hours to get numbers that are reproducible.
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It's a good idea to try the test run a few times, to find out if your
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