diff options
| author | Tom Lane <tgl@sss.pgh.pa.us> | 2007-06-08 18:23:53 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2007-06-08 18:23:53 +0000 |
| commit | a04a423599b347325f9a73dfb2d533b24e1cbab3 (patch) | |
| tree | 5aeb620900a705222eb202c7b4b1d33266d1c190 /src/backend/storage/ipc/ipci.c | |
| parent | 6d6d14b6d52f7a709fba8fd23244a7de014f2048 (diff) | |
Arrange for large sequential scans to synchronize with each other, so that
when multiple backends are scanning the same relation concurrently, each page
is (ideally) read only once.
Jeff Davis, with review by Heikki and Tom.
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 0296cbbcfc4..86c54448e4c 100644 --- a/src/backend/storage/ipc/ipci.c +++ b/src/backend/storage/ipc/ipci.c @@ -8,13 +8,14 @@ * * * IDENTIFICATION - * $PostgreSQL: pgsql/src/backend/storage/ipc/ipci.c,v 1.91 2007/02/15 23:23:23 alvherre Exp $ + * $PostgreSQL: pgsql/src/backend/storage/ipc/ipci.c,v 1.92 2007/06/08 18:23:52 tgl Exp $ * *------------------------------------------------------------------------- */ #include "postgres.h" #include "access/clog.h" +#include "access/heapam.h" #include "access/multixact.h" #include "access/nbtree.h" #include "access/subtrans.h" @@ -112,6 +113,7 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int port) size = add_size(size, BgWriterShmemSize()); size = add_size(size, AutoVacuumShmemSize()); size = add_size(size, BTreeShmemSize()); + size = add_size(size, SyncScanShmemSize()); #ifdef EXEC_BACKEND size = add_size(size, ShmemBackendArraySize()); #endif @@ -216,6 +218,7 @@ CreateSharedMemoryAndSemaphores(bool makePrivate, int port) * Set up other modules that need some shared memory space */ BTreeShmemInit(); + SyncScanShmemInit(); #ifdef EXEC_BACKEND |