diff options
Diffstat (limited to 'src/include/storage/smgr.h')
| -rw-r--r-- | src/include/storage/smgr.h | 12 |
1 files changed, 5 insertions, 7 deletions
diff --git a/src/include/storage/smgr.h b/src/include/storage/smgr.h index 65666595931..f28a8424013 100644 --- a/src/include/storage/smgr.h +++ b/src/include/storage/smgr.h @@ -45,15 +45,13 @@ typedef struct SMgrRelationData struct SMgrRelationData **smgr_owner; /* - * These next three fields are not actually used or manipulated by smgr, - * except that they are reset to InvalidBlockNumber upon a cache flush - * event (in particular, upon truncation of the relation). Higher levels - * store cached state here so that it will be reset when truncation - * happens. In all three cases, InvalidBlockNumber means "unknown". + * The following fields are reset to InvalidBlockNumber upon a cache flush + * event, and hold the last known size for each fork. This information is + * currently only reliable during recovery, since there is no cache + * invalidation for fork extension. */ BlockNumber smgr_targblock; /* current insertion target block */ - BlockNumber smgr_fsm_nblocks; /* last known size of fsm fork */ - BlockNumber smgr_vm_nblocks; /* last known size of vm fork */ + BlockNumber smgr_cached_nblocks[MAX_FORKNUM + 1]; /* last known size */ /* additional public fields may someday exist here */ |