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postgresql/src/include
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Noah Misch e525770dd5 Prevent concurrent SimpleLruTruncate() for any given SLRU. 
The SimpleLruTruncate() header comment states the new coding rule.  To
achieve this, add locktype "frozenid" and two LWLocks.  This closes a
rare opportunity for data loss, which manifested as "apparent
wraparound" or "could not access status of transaction" errors.  Data
loss is more likely in pg_multixact, due to released branches' thin
margin between multiStopLimit and multiWrapLimit.  If a user's physical
replication primary logged ":  apparent wraparound" messages, the user
should rebuild standbys of that primary regardless of symptoms.  At less
risk is a cluster having emitted "not accepting commands" errors or
"must be vacuumed" warnings at some point.  One can test a cluster for
this data loss by running VACUUM FREEZE in every database.  Back-patch
to 9.5 (all supported versions).

Discussion: https://postgr.es/m/20190218073103.GA1434723@rfd.leadboat.com
2020-08-15 10:15:57 -07:00
..
access Get rid of trailing semicolons in C macro definitions. 2020-05-01 17:28:01 -04:00
bootstrap Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
catalog Avoid direct C access to possibly-null pg_subscription_rel.srsublsn. 2020-07-21 11:40:47 -04:00
commands Mark assorted variables PGDLLIMPORT. 2017-12-05 09:24:05 -05:00
common Move connect.h from fe_utils to src/include/common. 2020-08-10 09:22:59 -07:00
datatype Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
executor Fix failure with initplans used conditionally during EvalPlanQual rechecks. 2018-09-15 13:42:34 -04:00
fe_utils Empty search_path in Autovacuum and non-psql/pgbench clients. 2018-02-26 07:39:47 -08:00
foreign Separate reinitialization of shared parallel-scan state from ExecReScan. 2017-08-30 13:18:16 -04:00
lib Rename rbtree.c functions to use "rbt" prefix not "rb" prefix. 2018-11-06 13:25:24 -05:00
libpq Fix postmaster's behavior during smart shutdown. 2020-08-14 13:26:57 -04:00
mb Phase 3 of pgindent updates. 2017-06-21 15:35:54 -04:00
nodes Be more careful about the shape of hashable subplan clauses. 2020-08-14 22:14:03 -04:00
optimizer Be more careful about the shape of hashable subplan clauses. 2020-08-14 22:14:03 -04:00
parser Require the schema qualification in pg_temp.type_name(arg). 2019-08-05 07:48:45 -07:00
port Avoid need for valgrind suppressions for pg_atomic_init_u64 on some platforms. 2020-06-08 20:03:09 -07:00
portability Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
postmaster Log when a BRIN autosummarization request fails 2018-03-14 12:00:53 -03:00
regex Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
replication Don't call palloc() while holding a spinlock, either. 2020-06-03 12:36:00 -04:00
rewrite Defend against self-referential views in relation_is_updatable(). 2019-11-21 16:21:44 -05:00
snowball Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
statistics Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
storage Prevent concurrent SimpleLruTruncate() for any given SLRU. 2020-08-15 10:15:57 -07:00
tcop Fix event triggers for partitioned tables 2018-10-06 19:17:46 -03:00
tsearch Fix serious performance problems in json(b) to_tsvector(). 2017-07-18 12:45:51 -04:00
utils Add missing #include. 2020-06-04 17:57:19 -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 Fix integer-overflow edge case detection in interval_mul and pgbench. 2019-11-07 11:23:02 -05:00
fmgr.h Fix minor violations of FunctionCallInvoke usage protocol. 2020-04-21 14:23:42 -04:00
funcapi.h Avoid holding a directory FD open across assorted SRF calls. 2020-03-16 21:05:55 -04:00
getaddrinfo.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
getopt_long.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
Makefile Add statistics subdirectory to Makefile. 2017-06-08 11:29:50 -04:00
miscadmin.h Add unlikely() to CHECK_FOR_INTERRUPTS() 2020-06-05 16:49:35 -04:00
pg_config.h.in Replace use of sys_siglist[] with strsignal(). 2020-07-15 22:05:12 -04:00
pg_config.h.win32 Stamp 10.14. 2020-08-10 17:19:16 -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 Fix default minimum value for descending sequences 2017-01-23 14:00:58 -05:00
pg_getopt.h Use our own getopt() on OpenBSD. 2019-01-18 15:06:26 -05:00
pg_trace.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pgstat.h Add GUC variables for stat tracking and timeout as PGDLLIMPORT 2020-01-21 13:47:05 +09:00
pgtar.h Phase 3 of pgindent updates. 2017-06-21 15:35:54 -04:00
pgtime.h Mark assorted variables PGDLLIMPORT. 2017-12-05 09:24:05 -05:00
port.h Replace use of sys_siglist[] with strsignal(). 2020-07-15 22:05:12 -04:00
postgres.h Phase 3 of pgindent updates. 2017-06-21 15:35:54 -04:00
postgres_ext.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
postgres_fe.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
rusagestub.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
windowapi.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00