database/postgres
database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-05-05 09:19:17 +03:00
Code

Synchronous replication doc corrections.

Browse Source 
Thom Brown
This commit is contained in:
Robert Haas 2011-03-07 11:59:58 -05:00
parent 7193a90fc1
commit c74d3aceb9
2 changed files with 4 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
doc/src/sgml/config.sgml
View File

@ -2092,7 +2092,7 @@ SET ENABLE_SEQSCAN TO OFF;
</para> </para>
<para> <para>
If a standby is removed from the list of servers then it will stop If a standby is removed from the list of servers then it will stop
being the synchronous standby, allowing another to take it's place. being the synchronous standby, allowing another to take its place.
If the list is empty, synchronous replication will not be If the list is empty, synchronous replication will not be
possible, whatever the setting of <varname>synchronous_replication</>, possible, whatever the setting of <varname>synchronous_replication</>,
however, already waiting commits will continue to wait. however, already waiting commits will continue to wait.

9
doc/src/sgml/high-availability.sgml
View File

@ -927,7 +927,7 @@ primary_conninfo = 'host=192.168.1.50 port=5432 user=foo password=foopass'
<para> <para>
All parameters have useful default values, so we can enable All parameters have useful default values, so we can enable
synchronous replication easily just by setting this on the primary synchronous replication easily just by setting this on the primary:
<programlisting> <programlisting>
synchronous_replication = on synchronous_replication = on
@ -938,7 +938,7 @@ synchronous_replication = on
even if that takes a very long time. even if that takes a very long time.
<varname>synchronous_replication</> can be set by individual <varname>synchronous_replication</> can be set by individual
users, so can be configured in the configuration file, for particular users, so can be configured in the configuration file, for particular
users or databases, or dynamically by applications programs. users or databases, or dynamically by applications.
</para> </para>
<para> <para>
@ -1008,9 +1008,6 @@ synchronous_replication = on
<para> <para>
You should consider that the network bandwidth must be higher than You should consider that the network bandwidth must be higher than
the rate of generation of WAL data. the rate of generation of WAL data.
10% of changes are important customer details, while
90% of changes are less important data that the business can more
easily survive if it is lost, such as chat messages between users.
</para> </para>
</sect3> </sect3>
@ -1019,7 +1016,7 @@ synchronous_replication = on
<title>Planning for High Availability</title> <title>Planning for High Availability</title>
<para> <para>
Commits made when synchronous_replication is set will wait until at Commits made when synchronous_replication is set will wait until
the sync standby responds. The response may never occur if the last, the sync standby responds. The response may never occur if the last,
or only, standby should crash. or only, standby should crash.
</para> </para>