diff options
| -rw-r--r-- | doc/src/sgml/wal.sgml | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/doc/src/sgml/wal.sgml b/doc/src/sgml/wal.sgml index b908720adea..4c0bf710dda 100644 --- a/doc/src/sgml/wal.sgml +++ b/doc/src/sgml/wal.sgml @@ -810,11 +810,12 @@ <para> There are two internal functions to write WAL data to disk: <function>XLogWrite</function> and <function>issue_xlog_fsync</function>. - When <xref linkend="guc-track-wal-io-timing"/> is enabled, the total + When <xref linkend="guc-track-io-timing"/> is enabled, the total amounts of time <function>XLogWrite</function> writes and <function>issue_xlog_fsync</function> syncs WAL data to disk are counted as - <literal>wal_write_time</literal> and <literal>wal_sync_time</literal> in - <xref linkend="pg-stat-wal-view"/>, respectively. + <varname>write_time</varname> and <varname>sync_time</varname> in + <xref linkend="pg-stat-io-view"/> for the <varname>object</varname> + <literal>wal</literal>, respectively. <function>XLogWrite</function> is normally called by <function>XLogInsertRecord</function> (when there is no space for the new record in WAL buffers), <function>XLogFlush</function> and the WAL writer, @@ -829,11 +830,12 @@ <literal>fsync</literal>, or <literal>fsync_writethrough</literal>, the write operation moves WAL buffers to kernel cache and <function>issue_xlog_fsync</function> syncs them to disk. Regardless - of the setting of <varname>track_wal_io_timing</varname>, the number + of the setting of <varname>track_io_timing</varname>, the number of times <function>XLogWrite</function> writes and <function>issue_xlog_fsync</function> syncs WAL data to disk are also - counted as <literal>wal_write</literal> and <literal>wal_sync</literal> - in <structname>pg_stat_wal</structname>, respectively. + counted as <varname>writes</varname> and <varname>fsyncs</varname> + in <structname>pg_stat_io</structname> for the <varname>object</varname> + <literal>wal</literal>, respectively. </para> <para> |