Truncate predicate lock manager's SLRU lazily at checkpoint. That's safer
Heikki Linnakangas <heikki.linnakangas@iki.fi>
Truncate predicate lock manager's SLRU lazily at checkpoint. That's safer than doing it aggressively whenever the tail-XID pointer is advanced, because this way we don't need to do it while holding SerializableXactHashLock. This also fixes bug #5915 spotted by YAMAMOTO Takashi, and removes an obsolete comment spotted by Kevin Grittner.
Files
| Path | Change | +/− |
|---|---|---|
| src/backend/access/transam/xlog.c | modified | +2 −0 |
| src/backend/storage/lmgr/predicate.c | modified | +65 −52 |
| src/include/storage/predicate.h | modified | +2 −0 |