mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-11-21 03:13:05 +08:00
f83d709760
The new combined WAL record is now used for pruning, freezing and 2nd pass of vacuum. This is in preparation for changing VACUUM to write a combined prune+freeze record per page, instead of separate two records. The new WAL record format now supports that, but the code still always writes separate records for pruning and freezing. This reserves separate XLOG_HEAP2_* info codes for when the pruning record is emitted for on-access pruning or VACUUM, per Peter Geoghegan's suggestion. The record format is identical, but having separate info codes makes it easier analyze pruning and vacuuming with pg_waldump. The function to emit the new WAL record, log_heap_prune_and_freeze(), is in pruneheap.c. The existing heap_log_freeze_plan() and its subroutines are moved to pruneheap.c without changes, to keep them together with log_heap_prune_and_freeze(). Author: Melanie Plageman <melanieplageman@gmail.com> Discussion: https://www.postgresql.org/message-id/CAAKRu_azf-zH%3DDgVbquZ3tFWjMY1w5pO8m-TXJaMdri8z3933g@mail.gmail.com Discussion: https://www.postgresql.org/message-id/CAAKRu_b2oE4GL%3Dq4g9mcByS9yT7wTQvEH9OLpabj28e%2BWKFi2A@mail.gmail.com |
||
|---|---|---|
| .. | ||
| backend | ||
| bin | ||
| common | ||
| fe_utils | ||
| include | ||
| interfaces | ||
| makefiles | ||
| pl | ||
| port | ||
| template | ||
| test | ||
| timezone | ||
| tools | ||
| tutorial | ||
| .gitignore | ||
| DEVELOPERS | ||
| Makefile | ||
| Makefile.global.in | ||
| Makefile.shlib | ||
| meson.build | ||
| nls-global.mk | ||