diff options
Diffstat (limited to 'src/backend/access/transam/slru.c')
| -rw-r--r-- | src/backend/access/transam/slru.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/backend/access/transam/slru.c b/src/backend/access/transam/slru.c index 3572b01091e..61249f4a12d 100644 --- a/src/backend/access/transam/slru.c +++ b/src/backend/access/transam/slru.c @@ -160,6 +160,17 @@ SimpleLruShmemSize(int nslots, int nlsns) return BUFFERALIGN(sz) + BLCKSZ * nslots; } +/* + * Initialize, or attach to, a simple LRU cache in shared memory. + * + * ctl: address of local (unshared) control structure. + * name: name of SLRU. (This is user-visible, pick with care!) + * nslots: number of page slots to use. + * nlsns: number of LSN groups per page (set to zero if not relevant). + * ctllock: LWLock to use to control access to the shared control structure. + * subdir: PGDATA-relative subdirectory that will contain the files. + * tranche_id: LWLock tranche ID to use for the SLRU's per-buffer LWLocks. + */ void SimpleLruInit(SlruCtl ctl, const char *name, int nslots, int nlsns, LWLock *ctllock, const char *subdir, int tranche_id) |