Change pgbench to use the table names pgbench_accounts, pgbench_branches,
pgbench_history, and pgbench_tellers, rather than just accounts, branches, history, and tellers. This is to prevent accidental conflicts with real application tables, as has been reported to happen at least once. Also remove the automatic "SET search_path = public" that it did at startup, as this seems to restrict testing flexibility without actually buying much. Per proposal by Joshua Drake and ensuing discussion. Joshua Drake and Tom Lane
This commit is contained in:
Tom Lane
parent
fdd48b1852
commit
48caf91b66
@ -4,7 +4,7 @@
|
||||
* A simple benchmark program for PostgreSQL
|
||||
* Originally written by Tatsuo Ishii and enhanced by many contributors.
|
||||
*
|
||||
* $PostgreSQL: pgsql/contrib/pgbench/pgbench.c,v 1.85 2009/02/27 09:30:21 petere Exp $
|
||||
* $PostgreSQL: pgsql/contrib/pgbench/pgbench.c,v 1.86 2009/05/07 22:01:18 tgl Exp $
|
||||
* Copyright (c) 2000-2009, PostgreSQL Global Development Group
|
||||
* ALL RIGHTS RESERVED;
|
||||
*
|
||||
@ -76,8 +76,8 @@ 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
|
||||
* accounts table.
|
||||
* scaling factor. for example, scale = 10 will make 1000000 tuples in
|
||||
* pgbench_accounts table.
|
||||
*/
|
||||
int scale = 1;
|
||||
|
||||
@ -181,11 +181,11 @@ static char *tpc_b = {
|
||||
"\\setrandom tid 1 :ntellers\n"
|
||||
"\\setrandom delta -5000 5000\n"
|
||||
"BEGIN;\n"
|
||||
"UPDATE accounts SET abalance = abalance + :delta WHERE aid = :aid;\n"
|
||||
"SELECT abalance FROM accounts WHERE aid = :aid;\n"
|
||||
"UPDATE tellers SET tbalance = tbalance + :delta WHERE tid = :tid;\n"
|
||||
"UPDATE branches SET bbalance = bbalance + :delta WHERE bid = :bid;\n"
|
||||
"INSERT INTO history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);\n"
|
||||
"UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid;\n"
|
||||
"SELECT abalance FROM pgbench_accounts WHERE aid = :aid;\n"
|
||||
"UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid;\n"
|
||||
"UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid;\n"
|
||||
"INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);\n"
|
||||
"END;\n"
|
||||
};
|
||||
|
||||
@ -199,9 +199,9 @@ static char *simple_update = {
|
||||
"\\setrandom tid 1 :ntellers\n"
|
||||
"\\setrandom delta -5000 5000\n"
|
||||
"BEGIN;\n"
|
||||
"UPDATE accounts SET abalance = abalance + :delta WHERE aid = :aid;\n"
|
||||
"SELECT abalance FROM accounts WHERE aid = :aid;\n"
|
||||
"INSERT INTO history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);\n"
|
||||
"UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid;\n"
|
||||
"SELECT abalance FROM pgbench_accounts WHERE aid = :aid;\n"
|
||||
"INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);\n"
|
||||
"END;\n"
|
||||
};
|
||||
|
||||
@ -209,7 +209,7 @@ static char *simple_update = {
|
||||
static char *select_only = {
|
||||
"\\set naccounts 100000 * :scale\n"
|
||||
"\\setrandom aid 1 :naccounts\n"
|
||||
"SELECT abalance FROM accounts WHERE aid = :aid;\n"
|
||||
"SELECT abalance FROM pgbench_accounts WHERE aid = :aid;\n"
|
||||
};
|
||||
|
||||
/* Connection overhead time */
|
||||
@ -269,8 +269,8 @@ usage(const char *progname)
|
||||
" -M {simple|extended|prepared}\n"
|
||||
" protocol for submitting queries to server (default: simple)\n"
|
||||
" -n do not run VACUUM before tests\n"
|
||||
" -N do not update tables \"tellers\" and \"branches\"\n"
|
||||
" -s NUM report scale factor in output\n"
|
||||
" -N do not update tables \"pgbench_tellers\" and \"pgbench_branches\"\n"
|
||||
" -s NUM report this scale factor in output\n"
|
||||
" -S perform SELECT-only transactions\n"
|
||||
" -t NUM number of transactions each client runs (default: 10)\n"
|
||||
" -T NUM duration of benchmark test in seconds\n"
|
||||
@ -357,8 +357,6 @@ doConnect(void)
|
||||
return NULL;
|
||||
}
|
||||
|
||||
executeStatement(conn, "SET search_path = public");
|
||||
|
||||
return conn;
|
||||
}
|
||||
|
||||
@ -1001,8 +999,6 @@ disconnect_all(CState * state)
|
||||
static void
|
||||
init(void)
|
||||
{
|
||||
PGconn *con;
|
||||
PGresult *res;
|
||||
/*
|
||||
* Note: TPC-B requires at least 100 bytes per row, and the "filler"
|
||||
* fields in these table declarations were intended to comply with that.
|
||||
@ -1014,22 +1010,24 @@ init(void)
|
||||
* behavior.
|
||||
*/
|
||||
static char *DDLs[] = {
|
||||
"drop table if exists branches",
|
||||
"create table branches(bid int not null,bbalance int,filler char(88)) with (fillfactor=%d)",
|
||||
"drop table if exists tellers",
|
||||
"create table tellers(tid int not null,bid int,tbalance int,filler char(84)) with (fillfactor=%d)",
|
||||
"drop table if exists accounts",
|
||||
"create table accounts(aid int not null,bid int,abalance int,filler char(84)) with (fillfactor=%d)",
|
||||
"drop table if exists history",
|
||||
"create table history(tid int,bid int,aid int,delta int,mtime timestamp,filler char(22))"};
|
||||
"drop table if exists pgbench_branches",
|
||||
"create table pgbench_branches(bid int not null,bbalance int,filler char(88)) with (fillfactor=%d)",
|
||||
"drop table if exists pgbench_tellers",
|
||||
"create table pgbench_tellers(tid int not null,bid int,tbalance int,filler char(84)) with (fillfactor=%d)",
|
||||
"drop table if exists pgbench_accounts",
|
||||
"create table pgbench_accounts(aid int not null,bid int,abalance int,filler char(84)) with (fillfactor=%d)",
|
||||
"drop table if exists pgbench_history",
|
||||
"create table pgbench_history(tid int,bid int,aid int,delta int,mtime timestamp,filler char(22))"
|
||||
};
|
||||
static char *DDLAFTERs[] = {
|
||||
"alter table branches add primary key (bid)",
|
||||
"alter table tellers add primary key (tid)",
|
||||
"alter table accounts add primary key (aid)"};
|
||||
|
||||
"alter table pgbench_branches add primary key (bid)",
|
||||
"alter table pgbench_tellers add primary key (tid)",
|
||||
"alter table pgbench_accounts add primary key (aid)"
|
||||
};
|
||||
|
||||
PGconn *con;
|
||||
PGresult *res;
|
||||
char sql[256];
|
||||
|
||||
int i;
|
||||
|
||||
if ((con = doConnect()) == NULL)
|
||||
@ -1040,9 +1038,9 @@ init(void)
|
||||
/*
|
||||
* set fillfactor for branches, tellers and accounts tables
|
||||
*/
|
||||
if ((strstr(DDLs[i], "create table branches") == DDLs[i]) ||
|
||||
(strstr(DDLs[i], "create table tellers") == DDLs[i]) ||
|
||||
(strstr(DDLs[i], "create table accounts") == DDLs[i]))
|
||||
if ((strstr(DDLs[i], "create table pgbench_branches") == DDLs[i]) ||
|
||||
(strstr(DDLs[i], "create table pgbench_tellers") == DDLs[i]) ||
|
||||
(strstr(DDLs[i], "create table pgbench_accounts") == DDLs[i]))
|
||||
{
|
||||
char ddl_stmt[128];
|
||||
|
||||
@ -1058,13 +1056,13 @@ init(void)
|
||||
|
||||
for (i = 0; i < nbranches * scale; i++)
|
||||
{
|
||||
snprintf(sql, 256, "insert into branches(bid,bbalance) values(%d,0)", i + 1);
|
||||
snprintf(sql, 256, "insert into pgbench_branches(bid,bbalance) values(%d,0)", i + 1);
|
||||
executeStatement(con, sql);
|
||||
}
|
||||
|
||||
for (i = 0; i < ntellers * scale; i++)
|
||||
{
|
||||
snprintf(sql, 256, "insert into tellers(tid,bid,tbalance) values (%d,%d,0)"
|
||||
snprintf(sql, 256, "insert into pgbench_tellers(tid,bid,tbalance) values (%d,%d,0)"
|
||||
,i + 1, i / ntellers + 1);
|
||||
executeStatement(con, sql);
|
||||
}
|
||||
@ -1072,14 +1070,14 @@ init(void)
|
||||
executeStatement(con, "commit");
|
||||
|
||||
/*
|
||||
* fill the accounts table with some data
|
||||
* fill the pgbench_accounts table with some data
|
||||
*/
|
||||
fprintf(stderr, "creating tables...\n");
|
||||
|
||||
executeStatement(con, "begin");
|
||||
executeStatement(con, "truncate accounts");
|
||||
executeStatement(con, "truncate pgbench_accounts");
|
||||
|
||||
res = PQexec(con, "copy accounts from stdin");
|
||||
res = PQexec(con, "copy pgbench_accounts from stdin");
|
||||
if (PQresultStatus(res) != PGRES_COPY_IN)
|
||||
{
|
||||
fprintf(stderr, "%s", PQerrorMessage(con));
|
||||
@ -1122,10 +1120,10 @@ init(void)
|
||||
|
||||
/* vacuum */
|
||||
fprintf(stderr, "vacuum...");
|
||||
executeStatement(con, "vacuum analyze branches");
|
||||
executeStatement(con, "vacuum analyze tellers");
|
||||
executeStatement(con, "vacuum analyze accounts");
|
||||
executeStatement(con, "vacuum analyze history");
|
||||
executeStatement(con, "vacuum analyze pgbench_branches");
|
||||
executeStatement(con, "vacuum analyze pgbench_tellers");
|
||||
executeStatement(con, "vacuum analyze pgbench_accounts");
|
||||
executeStatement(con, "vacuum analyze pgbench_history");
|
||||
|
||||
fprintf(stderr, "done.\n");
|
||||
PQfinish(con);
|
||||
@ -1466,7 +1464,7 @@ printResults(
|
||||
if (ttype == 0)
|
||||
s = "TPC-B (sort of)";
|
||||
else if (ttype == 2)
|
||||
s = "Update only accounts";
|
||||
s = "Update only pgbench_accounts";
|
||||
else if (ttype == 1)
|
||||
s = "SELECT only";
|
||||
else
|
||||
@ -1811,9 +1809,9 @@ main(int argc, char **argv)
|
||||
{
|
||||
/*
|
||||
* get the scaling factor that should be same as count(*) from
|
||||
* branches if this is not a custom query
|
||||
* pgbench_branches if this is not a custom query
|
||||
*/
|
||||
res = PQexec(con, "select count(*) from branches");
|
||||
res = PQexec(con, "select count(*) from pgbench_branches");
|
||||
if (PQresultStatus(res) != PGRES_TUPLES_OK)
|
||||
{
|
||||
fprintf(stderr, "%s", PQerrorMessage(con));
|
||||
@ -1822,7 +1820,7 @@ main(int argc, char **argv)
|
||||
scale = atoi(PQgetvalue(res, 0, 0));
|
||||
if (scale < 0)
|
||||
{
|
||||
fprintf(stderr, "count(*) from branches invalid (%d)\n", scale);
|
||||
fprintf(stderr, "count(*) from pgbench_branches invalid (%d)\n", scale);
|
||||
exit(1);
|
||||
}
|
||||
PQclear(res);
|
||||
@ -1830,7 +1828,7 @@ main(int argc, char **argv)
|
||||
/* warn if we override user-given -s switch */
|
||||
if (scale_given)
|
||||
fprintf(stderr,
|
||||
"Scale option ignored, using branches table count = %d\n",
|
||||
"Scale option ignored, using pgbench_branches table count = %d\n",
|
||||
scale);
|
||||
}
|
||||
|
||||
@ -1854,15 +1852,15 @@ main(int argc, char **argv)
|
||||
if (!is_no_vacuum)
|
||||
{
|
||||
fprintf(stderr, "starting vacuum...");
|
||||
executeStatement(con, "vacuum branches");
|
||||
executeStatement(con, "vacuum tellers");
|
||||
executeStatement(con, "truncate history");
|
||||
executeStatement(con, "vacuum pgbench_branches");
|
||||
executeStatement(con, "vacuum pgbench_tellers");
|
||||
executeStatement(con, "truncate pgbench_history");
|
||||
fprintf(stderr, "end.\n");
|
||||
|
||||
if (do_vacuum_accounts)
|
||||
{
|
||||
fprintf(stderr, "starting vacuum accounts...");
|
||||
executeStatement(con, "vacuum analyze accounts");
|
||||
fprintf(stderr, "starting vacuum pgbench_accounts...");
|
||||
executeStatement(con, "vacuum analyze pgbench_accounts");
|
||||
fprintf(stderr, "end.\n");
|
||||
}
|
||||
}
|
||||
|
||||
@ -1,4 +1,4 @@
|
||||
<!-- $PostgreSQL: pgsql/doc/src/sgml/pgbench.sgml,v 1.7 2008/09/11 23:52:48 tgl Exp $ -->
|
||||
<!-- $PostgreSQL: pgsql/doc/src/sgml/pgbench.sgml,v 1.8 2009/05/07 22:01:18 tgl Exp $ -->
|
||||
|
||||
<sect1 id="pgbench">
|
||||
<title>pgbench</title>
|
||||
@ -25,6 +25,7 @@
|
||||
<programlisting>
|
||||
transaction type: TPC-B (sort of)
|
||||
scaling factor: 10
|
||||
query mode: simple
|
||||
number of clients: 10
|
||||
number of transactions per client: 1000
|
||||
number of transactions actually processed: 10000/10000
|
||||
@ -32,7 +33,7 @@ tps = 85.184871 (including connections establishing)
|
||||
tps = 85.296346 (excluding connections establishing)
|
||||
</programlisting>
|
||||
|
||||
The first four lines just report some of the most important parameter
|
||||
The first five lines 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 per client); these will be equal unless the run
|
||||
@ -63,9 +64,10 @@ pgbench -i <optional> <replaceable>other-options</> </optional> <replaceable>dbn
|
||||
|
||||
<caution>
|
||||
<para>
|
||||
<literal>pgbench -i</> creates four tables <structname>accounts</>,
|
||||
<structname>branches</>, <structname>history</>, and
|
||||
<structname>tellers</>, destroying any existing tables of these names.
|
||||
<literal>pgbench -i</> creates four tables <structname>pgbench_accounts</>,
|
||||
<structname>pgbench_branches</>, <structname>pgbench_history</>, and
|
||||
<structname>pgbench_tellers</>,
|
||||
destroying any existing tables of these names.
|
||||
Be very careful to use another database if you have tables having these
|
||||
names!
|
||||
</para>
|
||||
@ -76,12 +78,12 @@ pgbench -i <optional> <replaceable>other-options</> </optional> <replaceable>dbn
|
||||
contain this many rows:
|
||||
</para>
|
||||
<programlisting>
|
||||
table # of rows
|
||||
-------------------------
|
||||
branches 1
|
||||
tellers 10
|
||||
accounts 100000
|
||||
history 0
|
||||
table # of rows
|
||||
---------------------------------
|
||||
pgbench_branches 1
|
||||
pgbench_tellers 10
|
||||
pgbench_accounts 100000
|
||||
pgbench_history 0
|
||||
</programlisting>
|
||||
<para>
|
||||
You can (and, for most purposes, probably should) increase the number
|
||||
@ -134,15 +136,16 @@ pgbench <optional> <replaceable>options</> </optional> <replaceable>dbname</>
|
||||
<entry><literal>-s</literal> <replaceable>scale_factor</></entry>
|
||||
<entry>
|
||||
Multiply the number of rows generated by the scale factor.
|
||||
For example, <literal>-s 100</> will imply 10,000,000 rows
|
||||
in the <structname>accounts</> table. Default is 1.
|
||||
For example, <literal>-s 100</> will create 10,000,000 rows
|
||||
in the <structname>pgbench_accounts</> table. Default is 1.
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>-F</literal> <replaceable>fillfactor</></entry>
|
||||
<entry>
|
||||
Create the <structname>accounts</>, <structname>tellers</> and
|
||||
<structname>branches</> tables with the given fillfactor.
|
||||
Create the <structname>pgbench_accounts</>,
|
||||
<structname>pgbench_tellers</> and
|
||||
<structname>pgbench_branches</> tables with the given fillfactor.
|
||||
Default is 100.
|
||||
</entry>
|
||||
</row>
|
||||
@ -177,14 +180,15 @@ pgbench <optional> <replaceable>options</> </optional> <replaceable>dbname</>
|
||||
<row>
|
||||
<entry><literal>-T</literal> <replaceable>seconds</></entry>
|
||||
<entry>
|
||||
Duration of benchmark test in seconds. <literal>-t</literal> and
|
||||
Run the test for this many seconds, rather than a fixed number of
|
||||
transactions per client. <literal>-t</literal> and
|
||||
<literal>-T</literal> are mutually exclusive.
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>-M</literal> <replaceable>querymode</></entry>
|
||||
<entry>
|
||||
Protocol to use for submitting queries for the server:
|
||||
Protocol to use for submitting queries to the server:
|
||||
<itemizedlist>
|
||||
<listitem>
|
||||
<para><literal>simple</>: use simple query protocol.</para>
|
||||
@ -203,7 +207,8 @@ pgbench <optional> <replaceable>options</> </optional> <replaceable>dbname</>
|
||||
<row>
|
||||
<entry><literal>-N</literal></entry>
|
||||
<entry>
|
||||
Do not update <structname>tellers</> and <structname>branches</>.
|
||||
Do not update <structname>pgbench_tellers</> and
|
||||
<structname>pgbench_branches</>.
|
||||
This will avoid update contention on these tables, but
|
||||
it makes the test case even less like TPC-B.
|
||||
</entry>
|
||||
@ -226,21 +231,21 @@ pgbench <optional> <replaceable>options</> </optional> <replaceable>dbname</>
|
||||
<row>
|
||||
<entry><literal>-n</literal></entry>
|
||||
<entry>
|
||||
No vacuuming is performed before running the test.
|
||||
Perform no vacuuming before running the test.
|
||||
This option is <emphasis>necessary</>
|
||||
if you are running a custom test scenario that does not include
|
||||
the standard tables <structname>accounts</>,
|
||||
<structname>branches</>, <structname>history</>, and
|
||||
<structname>tellers</>.
|
||||
the standard tables <structname>pgbench_accounts</>,
|
||||
<structname>pgbench_branches</>, <structname>pgbench_history</>, and
|
||||
<structname>pgbench_tellers</>.
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
<entry><literal>-v</literal></entry>
|
||||
<entry>
|
||||
Vacuum all four standard tables before running the test.
|
||||
With neither <literal>-n</> nor <literal>-v</>, pgbench will vacuum
|
||||
<structname>tellers</> and <structname>branches</> tables, and
|
||||
will remove all entries in <structname>history</>.
|
||||
With neither <literal>-n</> nor <literal>-v</>, pgbench will vacuum the
|
||||
<structname>pgbench_tellers</> and <structname>pgbench_branches</>
|
||||
tables, and will truncate <structname>pgbench_history</>.
|
||||
</entry>
|
||||
</row>
|
||||
<row>
|
||||
@ -271,7 +276,7 @@ pgbench <optional> <replaceable>options</> </optional> <replaceable>dbname</>
|
||||
Report the specified scale factor in <application>pgbench</>'s
|
||||
output. With the built-in tests, this is not necessary; the
|
||||
correct scale factor will be detected by counting the number of
|
||||
rows in the <structname>branches</> table. However, when testing
|
||||
rows in the <structname>pgbench_branches</> table. However, when testing
|
||||
custom benchmarks (<literal>-f</> option), the scale factor
|
||||
will be reported as 1 unless this option is used.
|
||||
</entry>
|
||||
@ -323,11 +328,11 @@ pgbench <optional> <replaceable>options</> </optional> <replaceable>dbname</>
|
||||
|
||||
<orderedlist>
|
||||
<listitem><para><literal>BEGIN;</literal></para></listitem>
|
||||
<listitem><para><literal>UPDATE accounts SET abalance = abalance + :delta WHERE aid = :aid;</literal></para></listitem>
|
||||
<listitem><para><literal>SELECT abalance FROM accounts WHERE aid = :aid;</literal></para></listitem>
|
||||
<listitem><para><literal>UPDATE tellers SET tbalance = tbalance + :delta WHERE tid = :tid;</literal></para></listitem>
|
||||
<listitem><para><literal>UPDATE branches SET bbalance = bbalance + :delta WHERE bid = :bid;</literal></para></listitem>
|
||||
<listitem><para><literal>INSERT INTO history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);</literal></para></listitem>
|
||||
<listitem><para><literal>UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid;</literal></para></listitem>
|
||||
<listitem><para><literal>SELECT abalance FROM pgbench_accounts WHERE aid = :aid;</literal></para></listitem>
|
||||
<listitem><para><literal>UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid;</literal></para></listitem>
|
||||
<listitem><para><literal>UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid;</literal></para></listitem>
|
||||
<listitem><para><literal>INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);</literal></para></listitem>
|
||||
<listitem><para><literal>END;</literal></para></listitem>
|
||||
</orderedlist>
|
||||
|
||||
@ -410,7 +415,7 @@ pgbench <optional> <replaceable>options</> </optional> <replaceable>dbname</>
|
||||
<listitem>
|
||||
<para>
|
||||
Sets variable <replaceable>varname</> to a random integer value
|
||||
between the limits <replaceable>min</> and <replaceable>max</>.
|
||||
between the limits <replaceable>min</> and <replaceable>max</> inclusive.
|
||||
Each limit can be either an integer constant or a
|
||||
<literal>:</><replaceable>variablename</> reference to a variable
|
||||
having an integer value.
|
||||
@ -463,11 +468,11 @@ pgbench <optional> <replaceable>options</> </optional> <replaceable>dbname</>
|
||||
\setrandom tid 1 :ntellers
|
||||
\setrandom delta -5000 5000
|
||||
BEGIN;
|
||||
UPDATE accounts SET abalance = abalance + :delta WHERE aid = :aid;
|
||||
SELECT abalance FROM accounts WHERE aid = :aid;
|
||||
UPDATE tellers SET tbalance = tbalance + :delta WHERE tid = :tid;
|
||||
UPDATE branches SET bbalance = bbalance + :delta WHERE bid = :bid;
|
||||
INSERT INTO history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);
|
||||
UPDATE pgbench_accounts SET abalance = abalance + :delta WHERE aid = :aid;
|
||||
SELECT abalance FROM pgbench_accounts WHERE aid = :aid;
|
||||
UPDATE pgbench_tellers SET tbalance = tbalance + :delta WHERE tid = :tid;
|
||||
UPDATE pgbench_branches SET bbalance = bbalance + :delta WHERE bid = :bid;
|
||||
INSERT INTO pgbench_history (tid, bid, aid, delta, mtime) VALUES (:tid, :bid, :aid, :delta, CURRENT_TIMESTAMP);
|
||||
END;
|
||||
</programlisting>
|
||||
|
||||
@ -537,7 +542,7 @@ END;
|
||||
(<literal>-s</>) should be at least as large as the largest number of
|
||||
clients you intend to test (<literal>-c</>); else you'll mostly be
|
||||
measuring update contention. There are only <literal>-s</> rows in
|
||||
the <structname>branches</> table, and every transaction wants to
|
||||
the <structname>pgbench_branches</> table, and every transaction wants to
|
||||
update one of them, so <literal>-c</> values in excess of <literal>-s</>
|
||||
will undoubtedly result in lots of transactions blocked waiting for
|
||||
other transactions.
|
||||
|
||||
Loading…
Reference in New Issue
Block a user