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Add new replication mode synchronous_commit = 'write'.

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Replication occurs only to memory on standby, not to disk,
so provides additional performance if user wishes to
reduce durability level slightly. Adds concept of multiple
independent sync rep queues.

Fujii Masao and Simon Riggs
This commit is contained in:
Simon Riggs
2012-01-24 20:22:37 +00:00
parent 89dda5f297
commit 443b4821f1
8 changed files with 124 additions and 52 deletions
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5
src/backend/utils/misc/guc.c
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@ -370,11 +370,12 @@ static const struct config_enum_entry constraint_exclusion_options[] = {
};
/*
* Although only "on", "off", and "local" are documented, we
* Although only "on", "off", "write", and "local" are documented, we
* accept all the likely variants of "on" and "off".
*/
static const struct config_enum_entry synchronous_commit_options[] = {
{"local", SYNCHRONOUS_COMMIT_LOCAL_FLUSH, false},
{"write", SYNCHRONOUS_COMMIT_REMOTE_WRITE, false},
{"on", SYNCHRONOUS_COMMIT_ON, false},
{"off", SYNCHRONOUS_COMMIT_OFF, false},
{"true", SYNCHRONOUS_COMMIT_ON, true},
@ -3164,7 +3165,7 @@ static struct config_enum ConfigureNamesEnum[] =
},
&synchronous_commit,
SYNCHRONOUS_COMMIT_ON, synchronous_commit_options,
NULL, NULL, NULL
NULL, assign_synchronous_commit, NULL
},
{