diff options
| -rw-r--r-- | doc/src/sgml/pgtestfsync.sgml | 24 |
1 files changed, 14 insertions, 10 deletions
diff --git a/doc/src/sgml/pgtestfsync.sgml b/doc/src/sgml/pgtestfsync.sgml index e4b7ecaaa3e..d5358a95e4b 100644 --- a/doc/src/sgml/pgtestfsync.sgml +++ b/doc/src/sgml/pgtestfsync.sgml @@ -9,9 +9,10 @@ <para> <application>pg_test_fsync</> is intended to give you a reasonable - idea of what the fastest fsync_method is on your specific system, + idea of what the fastest <xref linkend="guc-wal-sync-method"> is on your + specific system, as well as supplying diagnostic information in the event of an - identified I/O problem. However, differences shown by test_fsync + identified I/O problem. However, differences shown by pg_test_fsync might not make any difference in real database throughput, especially since many database servers are not speed-limited by their transaction logs. @@ -20,11 +21,13 @@ <sect2> <title>Usage</title> - <sect2> - <title><application>pg_test_fsync</> Options</title> +<synopsis> +pg_test_fsync [options] +</synopsis> <para> - <application>pg_test_fsync</application> accepts the following command-line arguments: + <application>pg_test_fsync</application> accepts the following + command-line options: <variablelist> @@ -33,9 +36,10 @@ <term><option>--filename</option></term> <listitem> <para> - Specifies the filename for test. The file should be in the - same file system as the <filename>pg_xlog</> directory. - <filename>/pg_xlog</> contains the <acronym>WAL</> files.) + Specifies the filename to write test data in. + This file should be in the same file system that the + <filename>pg_xlog</> directory is or will be placed in. + (<filename>pg_xlog</> contains the <acronym>WAL</> files.) The default is <filename>test_fsync.out</> in the current directory. </para> @@ -48,8 +52,8 @@ <listitem> <para> Specifies the number of operations per test. The more operations - per test, the greater the test's accuracy. The default is - 2000. + per test, the greater the test's accuracy, but the longer it takes + to run. The default is 2000. </para> </listitem> </varlistentry> |