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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2010-02-16 22:34:57 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2010-02-16 22:34:57 +0000 |
| commit | d1e027221d0243b7b57eabb0e482923dd7d1c8eb (patch) | |
| tree | 034988b788248c88fad3b73fb4d8d1afff2dd509 /src/backend/storage/ipc/ipci.c | |
| parent | fc5173ad514a216dc93bc190dbba3751024a257d (diff) | |
| download | postgresql-d1e027221d0243b7b57eabb0e482923dd7d1c8eb.tar.gz postgresql-d1e027221d0243b7b57eabb0e482923dd7d1c8eb.zip | |
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.
Diffstat (limited to 'src/backend/storage/ipc/ipci.c')
| -rw-r--r-- | src/backend/storage/ipc/ipci.c | 5 |
1 files changed, 4 insertions, 1 deletions
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 |