pgsql: Merge prune, freeze and vacuum WAL record formats
| От | Heikki Linnakangas |
|---|---|
| Тема | pgsql: Merge prune, freeze and vacuum WAL record formats |
| Дата | |
| Msg-id | E1rojxU-005ZjT-0P@gemulon.postgresql.org обсуждение исходный текст |
| Список | pgsql-committers |
Merge prune, freeze and vacuum WAL record formats 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 Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/f83d709760d84253b539ee454ce9ce1ceb9ad9ac Modified Files -------------- src/backend/access/gist/gistxlog.c | 8 +- src/backend/access/hash/hash_xlog.c | 9 +- src/backend/access/heap/heapam.c | 473 ++++++++----------------------- src/backend/access/heap/pruneheap.c | 407 ++++++++++++++++++++++---- src/backend/access/heap/vacuumlazy.c | 24 +- src/backend/access/rmgrdesc/heapdesc.c | 230 ++++++++++----- src/backend/replication/logical/decode.c | 6 +- src/include/access/heapam.h | 19 +- src/include/access/heapam_xlog.h | 220 +++++++++----- src/include/access/xlog_internal.h | 2 +- src/tools/pgindent/typedefs.list | 7 +- 11 files changed, 805 insertions(+), 600 deletions(-)
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