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| author | Tatsuo Ishii <ishii@postgresql.org> | 2019-01-17 15:34:41 +0900 |
|---|---|---|
| committer | Tatsuo Ishii <ishii@postgresql.org> | 2019-01-17 15:34:41 +0900 |
| commit | 2472ea0a53f0e3fe7cb315fbbe6619fa71b181f9 (patch) | |
| tree | ca392d1f94d5a12f3018c48c9ff05efe2213aee7 | |
| parent | 6c61d7c5935793e218d2335ac540a2cea7eacdce (diff) | |
| download | postgresql-2472ea0a53f0e3fe7cb315fbbe6619fa71b181f9.tar.gz postgresql-2472ea0a53f0e3fe7cb315fbbe6619fa71b181f9.zip | |
Doc: enhance pgbench manual.
Clarify the difference between "prepared mode" and other query modes.
Discussion: https://postgr.es/m/20181030.103654.2249812451112831300.t-ishii@sraoss.co.jp
Reviewed by: Fabien Coelh and Alvaro Herrera.
| -rw-r--r-- | doc/src/sgml/ref/pgbench.sgml | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/src/sgml/ref/pgbench.sgml b/doc/src/sgml/ref/pgbench.sgml index ca160881188..15ee7c0f2ba 100644 --- a/doc/src/sgml/ref/pgbench.sgml +++ b/doc/src/sgml/ref/pgbench.sgml @@ -473,6 +473,13 @@ pgbench <optional> <replaceable>options</replaceable> </optional> <replaceable>d <para><literal>prepared</literal>: use extended query protocol with prepared statements.</para> </listitem> </itemizedlist> + + Because in "prepared" mode <application>pgbench</application> reuses + the parse analysis result for the second and subsequent query + iteration, <application>pgbench</application> runs faster in the + prepared mode than in other modes. + </para> + <para> The default is simple query protocol. (See <xref linkend="protocol"/> for more information.) </para> |