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Fujii Masao b41669118c Improve the performance of relation deletes during recovery. 
When multiple relations are deleted at the same transaction,
the files of those relations are deleted by one call to smgrdounlinkall(),
which leads to scan whole shared_buffers only one time. OTOH,
previously, during recovery, smgrdounlink() (not smgrdounlinkall()) was
called for each file to delete, which led to scan shared_buffers
multiple times. Obviously this could cause to increase the WAL replay
time very much especially when shared_buffers was huge.

To alleviate this situation, this commit changes the recovery so that
it also calls smgrdounlinkall() only one time to delete multiple
relation files.

This is just fix for oversight of commit 279628a0a7, not new feature.
So, per discussion on pgsql-hackers, we concluded to backpatch this
to all supported versions.

Author: Fujii Masao
Reviewed-by: Michael Paquier, Andres Freund, Thomas Munro, Kyotaro Horiguchi, Takayuki Tsunakawa
Discussion: https://postgr.es/m/CAHGQGwHVQkdfDqtvGVkty+19cQakAydXn1etGND3X0PHbZ3+6w@mail.gmail.com
2018-07-05 02:23:46 +09:00
..
access pgindent run prior to branching 2018-06-30 12:25:49 -04:00
bootstrap Rationalize handling of array type names in bootstrap data. 2018-04-17 18:29:11 -04:00
catalog Mark binary_upgrade_set_missing_value as parallel_unsafe 2018-06-23 08:43:05 -04:00
commands Post-feature-freeze pgindent run. 2018-04-26 14:47:16 -04:00
common Fix incorrect ordering of operations in pg_resetwal and pg_rewind. 2018-05-23 10:59:55 -04:00
datatype Update copyright for 2018 2018-01-02 23:30:12 -05:00
executor Fix up run-time partition pruning's use of relcache's partition data. 2018-06-13 12:03:26 -04:00
fe_utils Post-feature-freeze pgindent run. 2018-04-26 14:47:16 -04:00
foreign Allow insert and update tuple routing and COPY for foreign tables. 2018-04-06 19:22:03 -04:00
jit Make PGJIT_* macros safer. 2018-04-23 04:48:08 -04:00
lib Fix a boatload of typos in C comments. 2018-04-01 15:01:28 -04:00
libpq Change pqformat.h's integer handling functions to take unsigned integers. 2018-06-26 23:40:32 -07:00
mb Fix a boatload of typos in C comments. 2018-04-01 15:01:28 -04:00
nodes Fix typo in comment 2018-06-27 15:40:28 -04:00
optimizer Allow direct lookups of AppendRelInfo by child relid 2018-06-26 10:35:26 -04:00
parser Post-feature-freeze pgindent run. 2018-04-26 14:47:16 -04:00
partitioning Consistently use the term 'partitioned rel' in partprune comments 2018-06-20 11:43:01 -04:00
port Remove overzeleous assertions in pg_atomic_flag code. 2018-04-07 18:30:15 -07:00
portability Update copyright for 2018 2018-01-02 23:30:12 -05:00
postmaster Add comment explaining BGWORKER_BYPASS_ALLOWCONN 2018-04-23 10:31:22 +02:00
regex Update copyright for 2018 2018-01-02 23:30:12 -05:00
replication pgindent run prior to branching 2018-06-30 12:25:49 -04:00
rewrite Revert MERGE patch 2018-04-12 11:22:56 +01:00
snowball Update copyright for 2018 2018-01-02 23:30:12 -05:00
statistics Update copyright for 2018 2018-01-02 23:30:12 -05:00
storage Improve the performance of relation deletes during recovery. 2018-07-05 02:23:46 +09:00
tcop Post-feature-freeze pgindent run. 2018-04-26 14:47:16 -04:00
tsearch Post-feature-freeze pgindent run. 2018-04-26 14:47:16 -04:00
utils Teach SHOW ALL to honor pg_read_all_settings membership 2018-06-08 16:19:05 -04:00
.gitignore Autoconfiscate selection of 64-bit int type for 64-bit large object API. 2012-10-07 21:52:43 -04:00
c.h Support platforms where strtoll/strtoull are spelled __strtoll/__strtoull. 2018-05-19 14:22:18 -04:00
fmgr.h Add expression compilation support to LLVM JIT provider. 2018-03-22 14:45:59 -07:00
funcapi.h Support INOUT arguments in procedures 2018-03-14 12:07:28 -04:00
getaddrinfo.h Update copyright for 2018 2018-01-02 23:30:12 -05:00
getopt_long.h Update copyright for 2018 2018-01-02 23:30:12 -05:00
Makefile Rearrange makefile rules for running Gen_fmgrtab.pl. 2018-05-03 17:54:18 -04:00
miscadmin.h Allow group access on PGDATA 2018-04-07 17:45:39 -04:00
pg_config.h.in Remove configure's check for nonstandard "long long" printf modifiers. 2018-05-23 14:19:04 -04:00
pg_config.h.win32 Stamp HEAD as 12devel 2018-06-30 12:47:59 -04:00
pg_config_ext.h.in Autoconfiscate selection of 64-bit int type for 64-bit large object API. 2012-10-07 21:52:43 -04:00
pg_config_ext.h.win32 Autoconfiscate selection of 64-bit int type for 64-bit large object API. 2012-10-07 21:52:43 -04:00
pg_config_manual.h Update copyright for 2018 2018-01-02 23:30:12 -05:00
pg_getopt.h Update copyright for 2018 2018-01-02 23:30:12 -05:00
pg_trace.h Update copyright for 2018 2018-01-02 23:30:12 -05:00
pgstat.h Add wait event for fsync of WAL segments 2018-07-02 22:19:46 +09:00
pgtar.h Update copyright for 2018 2018-01-02 23:30:12 -05:00
pgtime.h Update copyright for 2018 2018-01-02 23:30:12 -05:00
port.h Fix a boatload of typos in C comments. 2018-04-01 15:01:28 -04:00
postgres.h Detoast plpgsql variables if they might live across a transaction boundary. 2018-05-16 14:56:52 -04:00
postgres_ext.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
postgres_fe.h Update copyright for 2018 2018-01-02 23:30:12 -05:00
rusagestub.h Update copyright for 2018 2018-01-02 23:30:12 -05:00
windowapi.h Update copyright for 2018 2018-01-02 23:30:12 -05:00