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Minor wordsmithing in release notes' description of asynchronous commit.

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Tom Lane 2008-02-02 23:30:23 +00:00
parent 19c40492f0
commit 09bcb24806
1 changed files with 8 additions and 7 deletions
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doc/src/sgml/release.sgml
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@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.577 2008/01/31 21:31:33 tgl Exp $ --> <!-- $PostgreSQL: pgsql/doc/src/sgml/release.sgml,v 1.578 2008/02/02 23:30:23 tgl Exp $ -->
<!-- <!--
Typical markup: Typical markup:
@ -697,13 +697,14 @@ current_date &lt; 2017-11-17
<para> <para>
This feature dramatically increases performance for short data-modifying This feature dramatically increases performance for short data-modifying
transactions. The disadvantage is that because disk writes are transactions. The disadvantage is that because disk writes are delayed,
delayed, if the operating system crashes before data is written to if the database or operating system crashes before data is written to
the disk, committed data will be lost. This feature is useful for the disk, committed data will be lost. This feature is useful for
applications that can accept some data loss. Unlike turning off applications that can accept some data loss. Unlike turning off
<varname>fsync</varname>, asynchronous commit does not put database <varname>fsync</varname>, using asynchronous commit does not put
consistency at risk; the worst case is that after a database or system database consistency at risk; the worst case is that after a crash the
crash the last few reportedly-committed transactions might be missing. last few reportedly-committed transactions might not be committed after
all.
This feature is enabled by turning off <varname>synchronous_commit</> This feature is enabled by turning off <varname>synchronous_commit</>
(which can be done per-session or per-transaction, if some transactions (which can be done per-session or per-transaction, if some transactions
are critical and others are not). are critical and others are not).