diff options
Diffstat (limited to 'src/backend/commands/vacuumlazy.c')
| -rw-r--r-- | src/backend/commands/vacuumlazy.c | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/src/backend/commands/vacuumlazy.c b/src/backend/commands/vacuumlazy.c index 93ea0851242..ff6bd8e5b06 100644 --- a/src/backend/commands/vacuumlazy.c +++ b/src/backend/commands/vacuumlazy.c @@ -180,7 +180,8 @@ lazy_vacuum_rel(Relation onerel, VacuumStmt *vacstmt, write_rate; bool scan_all; /* should we scan all pages? */ bool scanned_all; /* did we actually scan all pages? */ - TransactionId freezeTableLimit; + TransactionId xidFullScanLimit; + MultiXactId mxactFullScanLimit; BlockNumber new_rel_pages; double new_rel_tuples; BlockNumber new_rel_allvisible; @@ -203,10 +204,19 @@ lazy_vacuum_rel(Relation onerel, VacuumStmt *vacstmt, vacuum_set_xid_limits(vacstmt->freeze_min_age, vacstmt->freeze_table_age, onerel->rd_rel->relisshared, - &OldestXmin, &FreezeLimit, &freezeTableLimit, - &MultiXactCutoff); + &OldestXmin, &FreezeLimit, &xidFullScanLimit, + &MultiXactCutoff, &mxactFullScanLimit); + + /* + * We request a full scan if either the table's frozen Xid is now older + * than or equal to the requested Xid full-table scan limit; or if the + * table's minimum MultiXactId is older than or equal to the requested mxid + * full-table scan limit. + */ scan_all = TransactionIdPrecedesOrEquals(onerel->rd_rel->relfrozenxid, - freezeTableLimit); + xidFullScanLimit); + scan_all |= MultiXactIdPrecedesOrEquals(onerel->rd_rel->relminmxid, + mxactFullScanLimit); vacrelstats = (LVRelStats *) palloc0(sizeof(LVRelStats)); |