diff options
Diffstat (limited to 'src/backend/commands/vacuum.c')
| -rw-r--r-- | src/backend/commands/vacuum.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/src/backend/commands/vacuum.c b/src/backend/commands/vacuum.c index 5189a5ad5e3..23eb605d4cb 100644 --- a/src/backend/commands/vacuum.c +++ b/src/backend/commands/vacuum.c @@ -949,11 +949,11 @@ vacuum_set_xid_limits(Relation rel, /* * We can always ignore processes running lazy vacuum. This is because we * use these values only for deciding which tuples we must keep in the - * tables. Since lazy vacuum doesn't write its XID anywhere, it's safe to - * ignore it. In theory it could be problematic to ignore lazy vacuums in - * a full vacuum, but keep in mind that only one vacuum process can be - * working on a particular table at any time, and that each vacuum is - * always an independent transaction. + * tables. Since lazy vacuum doesn't write its XID anywhere (usually no + * XID assigned), it's safe to ignore it. In theory it could be + * problematic to ignore lazy vacuums in a full vacuum, but keep in mind + * that only one vacuum process can be working on a particular table at + * any time, and that each vacuum is always an independent transaction. */ *oldestXmin = GetOldestNonRemovableTransactionId(rel); |