diff options
| -rw-r--r-- | doc/src/sgml/config.sgml | 17 |
1 files changed, 9 insertions, 8 deletions
diff --git a/doc/src/sgml/config.sgml b/doc/src/sgml/config.sgml index e81141e45cf..d7a73767984 100644 --- a/doc/src/sgml/config.sgml +++ b/doc/src/sgml/config.sgml @@ -4503,15 +4503,16 @@ ANY <replaceable class="parameter">num_sync</replaceable> ( <replaceable class=" view. The standby will report the last write-ahead log location it has written, the last position it has flushed to disk, and the last position it has applied. - This parameter's - value is the maximum amount of time between reports. Updates are - sent each time the write or flush positions change, or at least as - often as specified by this parameter. Thus, the apply position may - lag slightly behind the true position. + This parameter's value is the maximum amount of time between reports. + Updates are sent each time the write or flush positions change, or as + often as specified by this parameter if set to a non-zero value. + There are additional cases where updates are sent while ignoring this + parameter; for example, when processing of the existing WAL completes + or when <varname>synchronous_commit</varname> is set to + <literal>remote_apply</literal>. + Thus, the apply position may lag slightly behind the true position. If this value is specified without units, it is taken as seconds. - The default value is 10 seconds. - Setting this parameter to zero disables status updates completely. - This parameter can only be set in + The default value is 10 seconds. This parameter can only be set in the <filename>postgresql.conf</filename> file or on the server command line. </para> |