From d1e027221d0243b7b57eabb0e482923dd7d1c8eb Mon Sep 17 00:00:00 2001 From: Tom Lane Date: Tue, 16 Feb 2010 22:34:57 +0000 Subject: Replace the pg_listener-based LISTEN/NOTIFY mechanism with an in-memory queue. In addition, add support for a "payload" string to be passed along with each notify event. This implementation should be significantly more efficient than the old one, and is also more compatible with Hot Standby usage. There is not yet any facility for HS slaves to receive notifications generated on the master, although such a thing is possible in future. Joachim Wieland, reviewed by Jeff Davis; also hacked on by me. --- src/backend/storage/ipc/ipci.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'src/backend/storage/ipc/ipci.c') diff --git a/src/backend/storage/ipc/ipci.c b/src/backend/storage/ipc/ipci.c index 01a9fabc8c9..b4923d278a7 100644 --- a/src/backend/storage/ipc/ipci.c +++ b/src/backend/storage/ipc/ipci.c @@ -8,7 +8,7 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/storage/ipc/ipci.c,v 1.103 2010/01/15 09:19:03 heikki Exp $ + * $PostgreSQL: pgsql/src/backend/storage/ipc/ipci.c,v 1.104 2010/02/16 22:34:50 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -20,6 +20,7 @@ #include "access/nbtree.h" #include "access/subtrans.h" #include "access/twophase.h" +#include "commands/async.h" #include "miscadmin.h" #include "pgstat.h" #include "postmaster/autovacuum.h" @@ -122,6 +123,7 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int port) size = add_size(size, WalRcvShmemSize()); size = add_size(size, BTreeShmemSize()); size = add_size(size, SyncScanShmemSize()); + size = add_size(size, AsyncShmemSize()); #ifdef EXEC_BACKEND size = add_size(size, ShmemBackendArraySize()); #endif @@ -225,6 +227,7 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int port) */ BTreeShmemInit(); SyncScanShmemInit(); + AsyncShmemInit(); #ifdef EXEC_BACKEND -- cgit v1.2.3