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Diffstat (limited to 'src/backend/storage/smgr/smgr.c')
| -rw-r--r-- | src/backend/storage/smgr/smgr.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/backend/storage/smgr/smgr.c b/src/backend/storage/smgr/smgr.c index 631733b..8ded269 100644 --- a/src/backend/storage/smgr/smgr.c +++ b/src/backend/storage/smgr/smgr.c @@ -604,8 +604,9 @@ BlockNumber smgrnblocks_cached(SMgrRelation reln, ForkNumber forknum) { /* - * For now, we only use cached values in recovery due to lack of a shared - * invalidation mechanism for changes in file size. + * For now, this function uses cached values only in recovery due to lack + * of a shared invalidation mechanism for changes in file size. Code + * elsewhere reads smgr_cached_nblocks and copes with stale data. */ if (InRecovery && reln->smgr_cached_nblocks[forknum] != InvalidBlockNumber) return reln->smgr_cached_nblocks[forknum]; |