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Add new function pg_notification_queue_usage.

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This tells you what fraction of NOTIFY's queue is currently filled.

Brendan Jurd, reviewed by Merlin Moncure and Gurjeet Singh.  A few
further tweaks by me.
This commit is contained in:
Robert Haas
2015-07-17 09:12:03 -04:00
parent 43d89a23d5
commit a04bb65f70
10 changed files with 115 additions and 19 deletions
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src/include/commands/async.h
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@@ -37,6 +37,7 @@ extern void Async_UnlistenAll(void);
/* notify-related SQL functions */
extern Datum pg_listening_channels(PG_FUNCTION_ARGS);
extern Datum pg_notify(PG_FUNCTION_ARGS);
extern Datum pg_notification_queue_usage(PG_FUNCTION_ARGS);
/* perform (or cancel) outbound notify processing at transaction commit */
extern void PreCommit_Notify(void);