diff options
| author | Cédric Villemain | 2011-04-28 22:00:34 +0000 |
|---|---|---|
| committer | Cédric Villemain | 2011-05-01 14:33:14 +0000 |
| commit | c5f02abc6cbc605a75307ede381d7fecf2b4a206 (patch) | |
| tree | d8bdc3b82e12f556cacc0c9ff9a488190e1eea7f | |
| parent | e1476e4c410d22c355ef8668fd8170456d4dacea (diff) | |
Add 2 Hooks to handle OSCache and PGCache stats
The hooks are in:
* RelationGetRelationOSCacheInFork
* RelationGetRelationPGCacheInFork
| -rw-r--r-- | src/backend/storage/buffer/bufmgr.c | 15 | ||||
| -rw-r--r-- | src/include/storage/bufmgr.h | 10 | ||||
| -rw-r--r-- | src/tools/pgindent/typedefs.list | 2 |
3 files changed, 27 insertions, 0 deletions
diff --git a/src/backend/storage/buffer/bufmgr.c b/src/backend/storage/buffer/bufmgr.c index 301b368d37..5cea9297e4 100644 --- a/src/backend/storage/buffer/bufmgr.c +++ b/src/backend/storage/buffer/bufmgr.c @@ -106,6 +106,13 @@ static volatile BufferDesc *BufferAlloc(SMgrRelation smgr, static void FlushBuffer(volatile BufferDesc *buf, SMgrRelation reln); static void AtProcExit_Buffers(int code, Datum arg); +/* + * Hooks for plugins to get control in + * RelationGetRelationOSCacheInFork + * RelationGetRelationPGCacheInFork + */ +oscache_hook_type OSCache_hook = NULL; +pgcache_hook_type PGCache_hook = NULL; /* * PrefetchBuffer -- initiate asynchronous read of a block of a relation @@ -1932,6 +1939,10 @@ RelationGetRelationOSCacheInFork(Relation relation, ForkNumber forkNum) { float4 percent = 0; + /* if a plugin is present, let it manage things */ + if (OSCache_hook) + percent = (*OSCache_hook) (relation, forkNum); + return percent; } @@ -1945,6 +1956,10 @@ RelationGetRelationPGCacheInFork(Relation relation, ForkNumber forkNum) { float4 percent = 0; + /* if a plugin is present, let it manage things */ + if (PGCache_hook) + percent = (*PGCache_hook) (relation, forkNum); + return percent; } diff --git a/src/include/storage/bufmgr.h b/src/include/storage/bufmgr.h index 5bcc911b22..8b621de791 100644 --- a/src/include/storage/bufmgr.h +++ b/src/include/storage/bufmgr.h @@ -219,4 +219,14 @@ extern void AtProcExit_LocalBuffers(void); extern BufferAccessStrategy GetAccessStrategy(BufferAccessStrategyType btype); extern void FreeAccessStrategy(BufferAccessStrategy strategy); +/* +* Hooks for plugins to get control in +* RelationGetRelationOSCacheInFork +* RelationGetRelationPGCacheInFork +*/ +typedef float4 (*oscache_hook_type) (Relation relation, ForkNumber forkNum); +extern PGDLLIMPORT oscache_hook_type OSCache_hook; +typedef float4 (*pgcache_hook_type) (Relation relation, ForkNumber forkNum); +extern PGDLLIMPORT pgcache_hook_type PGCache_hook; + #endif diff --git a/src/tools/pgindent/typedefs.list b/src/tools/pgindent/typedefs.list index 5e28289614..64ef53fd00 100644 --- a/src/tools/pgindent/typedefs.list +++ b/src/tools/pgindent/typedefs.list @@ -963,6 +963,7 @@ OprCacheKey OprInfo OprProofCacheEntry OprProofCacheKey +OSCache_hook_type OutputContext OverrideSearchPath OverrideStackEntry @@ -973,6 +974,7 @@ PBOOL PCtxtHandle PFN PGAsyncStatusType +PGCache_hook_type PGCALL2 PGEvent PGEventConnDestroy |