postgres

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Fujii Masao 93eb619cd3 Ensure that num_sync is greater than zero in synchronous_standby_names.

Previously num_sync could be set to zero and this setting caused
an assertion failure. This means that multiple synchronous standbys
code should assume that num_sync is greater than zero.
Also setting num_sync to zero is nonsense because it's basically
the configuration for synchronous replication. If users want not to
make transaction commits wait for any standbys,
synchronous_standby_names should be emptied to disable synchronous
replication instead of setting num_sync to zero.

This patch forbids users from setting num_sync to zero in
synchronous_standby_names. If zero is specified, an error will
happen during processing the parameter settings.

Back-patch to 9.6 where multiple synchronous standbys feature was added.

Patch by me. Reviewed by Tom Lane.
Discussion: <CAHGQGwHWB3izc6cXuFLh5kOcAbFXaRhhgwd-X5PeN9TEjxqXwg@mail.gmail.com>

2016-12-17 02:22:15 +09:00

backend

Ensure that num_sync is greater than zero in synchronous_standby_names.

2016-12-17 02:22:15 +09:00

bin

Add missing newline in message

2016-12-15 16:45:31 +01:00

common

Rename "pg_xlog" directory to "pg_wal".

2016-10-20 11:32:18 -04:00

fe_utils

Restore psql's SIGPIPE setting if popen() fails.