diff options
Diffstat (limited to 'src/include/utils/snapmgr.h')
| -rw-r--r-- | src/include/utils/snapmgr.h | 49 |
1 files changed, 0 insertions, 49 deletions
diff --git a/src/include/utils/snapmgr.h b/src/include/utils/snapmgr.h index 980d37a1947..4dc94e7ec98 100644 --- a/src/include/utils/snapmgr.h +++ b/src/include/utils/snapmgr.h @@ -19,40 +19,6 @@ #include "utils/snapshot.h" -/* - * The structure used to map times to TransactionId values for the "snapshot - * too old" feature must have a few entries at the tail to hold old values; - * otherwise the lookup will often fail and the expected early pruning or - * vacuum will not usually occur. It is best if this padding is for a number - * of minutes greater than a thread would normally be stalled, but it's OK if - * early vacuum opportunities are occasionally missed, so there's no need to - * use an extreme value or get too fancy. 10 minutes seems plenty. - */ -#define OLD_SNAPSHOT_PADDING_ENTRIES 10 -#define OLD_SNAPSHOT_TIME_MAP_ENTRIES (old_snapshot_threshold + OLD_SNAPSHOT_PADDING_ENTRIES) - -/* - * Common definition of relation properties that allow early pruning/vacuuming - * when old_snapshot_threshold >= 0. - */ -#define RelationAllowsEarlyPruning(rel) \ -( \ - RelationIsPermanent(rel) && !IsCatalogRelation(rel) \ - && !RelationIsAccessibleInLogicalDecoding(rel) \ -) - -#define EarlyPruningEnabled(rel) (old_snapshot_threshold >= 0 && RelationAllowsEarlyPruning(rel)) - -/* GUC variables */ -extern PGDLLIMPORT int old_snapshot_threshold; - - -extern Size SnapMgrShmemSize(void); -extern void SnapMgrInit(void); -extern TimestampTz GetSnapshotCurrentTimestamp(void); -extern TimestampTz GetOldSnapshotThresholdTimestamp(void); -extern void SnapshotTooOldMagicForTest(void); - extern PGDLLIMPORT bool FirstSnapshotSet; extern PGDLLIMPORT TransactionId TransactionXmin; @@ -97,14 +63,6 @@ extern PGDLLIMPORT SnapshotData CatalogSnapshotData; ((snapshot)->snapshot_type == SNAPSHOT_MVCC || \ (snapshot)->snapshot_type == SNAPSHOT_HISTORIC_MVCC) -#ifndef FRONTEND -static inline bool -OldSnapshotThresholdActive(void) -{ - return old_snapshot_threshold >= 0; -} -#endif - extern Snapshot GetTransactionSnapshot(void); extern Snapshot GetLatestSnapshot(void); extern void SnapshotSetCommandId(CommandId curcid); @@ -138,13 +96,6 @@ extern void DeleteAllExportedSnapshotFiles(void); extern void WaitForOlderSnapshots(TransactionId limitXmin, bool progress); extern bool ThereAreNoPriorRegisteredSnapshots(void); extern bool HaveRegisteredOrActiveSnapshot(void); -extern bool TransactionIdLimitedForOldSnapshots(TransactionId recentXmin, - Relation relation, - TransactionId *limit_xid, - TimestampTz *limit_ts); -extern void SetOldSnapshotThresholdTimestamp(TimestampTz ts, TransactionId xlimit); -extern void MaintainOldSnapshotTimeMapping(TimestampTz whenTaken, - TransactionId xmin); extern char *ExportSnapshot(Snapshot snapshot); |