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postgresql/src/include/utils
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Thomas Munro f691f5b80a Remove the "snapshot too old" feature. 
Remove the old_snapshot_threshold setting and mechanism for producing
the error "snapshot too old", originally added by commit 848ef42b.
Unfortunately it had a number of known problems in terms of correctness
and performance, mostly reported by Andres in the course of his work on
snapshot scalability.  We agreed to remove it, after a long period
without an active plan to fix it.

This is certainly a desirable feature, and someone might propose a new
or improved implementation in the future.

Reported-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/CACG%3DezYV%2BEvO135fLRdVn-ZusfVsTY6cH1OZqWtezuEYH6ciQA%40mail.gmail.com
Discussion: https://postgr.es/m/20200401064008.qob7bfnnbu4w5cw4%40alap3.anarazel.de
Discussion: https://postgr.es/m/CA%2BTgmoY%3Daqf0zjTD%2B3dUWYkgMiNDegDLFjo%2B6ze%3DWtpik%2B3XqA%40mail.gmail.com
2023-09-05 19:53:43 +12:00
..
.gitignore Generate automatically code and documentation related to wait events 2023-07-05 10:53:11 +09:00
acl.h Revert MAINTAIN privilege and pg_maintain predefined role. 2023-07-07 11:25:13 -07:00
aclchk_internal.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
array.h Allow parallel aggregate on string_agg and array_agg 2023-01-23 17:35:01 +13:00
arrayaccess.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
ascii.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
attoptcache.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
backend_progress.h Add new parallel message type to progress reporting. 2023-07-11 12:33:54 +09:00
backend_status.h Use actual backend IDs in pg_stat_get_backend_subxact(). 2023-08-30 14:47:01 -07:00
builtins.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
bytea.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
cash.h Convert *GetDatum() and DatumGet*() macros to inline functions 2022-09-27 20:50:21 +02:00
catcache.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
combocid.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
conffiles.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
date.h Add back SQLValueFunction for SQL keywords 2023-05-17 10:19:17 +09:00
datetime.h Refactor datetime functions' timezone lookup code to reduce duplication. 2023-03-17 17:47:19 -04:00
datum.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
dsa.h Avoid type cheats for invalid dsa_handles and dshash_table_handles. 2023-01-25 11:48:38 -05:00
dynahash.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
elog.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
evtcache.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
expandeddatum.h New header varatt.h split off from postgres.h 2023-01-10 05:54:36 +01:00
expandedrecord.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
float.h Doc: improve commentary about providing our own definitions of M_PI. 2023-01-08 16:25:33 -05:00
fmgrtab.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
formatting.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
freepage.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
geo_decls.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
guc.h Transform proconfig for faster execution. 2023-08-10 12:43:53 -07:00
guc_hooks.h Make error messages about WAL segment size more consistent 2023-08-28 15:17:04 +02:00
guc_tables.h Minor GUC code refactoring. 2023-01-27 12:13:41 -05:00
help_config.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
hsearch.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
index_selfuncs.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
inet.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
inval.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
json.h SQL/JSON: support the IS JSON predicate 2023-03-31 22:34:04 +02:00
jsonb.h SQL/JSON: add standard JSON constructor functions 2023-03-29 12:11:36 +02:00
jsonfuncs.h Add more SQL/JSON constructor functions 2023-07-26 17:08:33 +09:00
jsonpath.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
logtape.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
lsyscache.h Allow the use of a hash index on the subscriber during replication. 2023-07-14 08:21:54 +05:30
memdebug.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
memutils.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
memutils_internal.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
memutils_memorychunk.h Fix various typos 2023-04-18 13:23:23 +12:00
meson.build Add system view pg_wait_events 2023-08-20 15:35:02 +09:00
multirangetypes.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
numeric.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
palloc.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
partcache.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
pg_crc.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
pg_locale.h All supported systems have locale_t. 2023-07-09 11:55:18 +12:00
pg_lsn.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
pg_rusage.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
pgstat_internal.h Fix various typos and incorrect/outdated name references 2023-04-19 13:50:33 +12:00
pidfile.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
plancache.h Rename OverrideSearchPath to SearchPathMatcher. 2023-07-31 17:04:47 -07:00
portal.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
ps_status.h Speedup and increase usability of set proc title functions 2023-02-20 16:18:27 +13:00
queryenvironment.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
rangetypes.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
regproc.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
rel.h Pre-beta mechanical code beautification. 2023-05-19 17:24:48 -04:00
relcache.h Document RelationGetIndexAttrBitmap better 2023-08-10 12:04:07 +02:00
relfilenumbermap.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
relmapper.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
relptr.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
reltrigger.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
resowner.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
resowner_private.h bufmgr: Support multiple in-progress IOs by using resowner 2023-04-05 14:17:55 -07:00
rls.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
ruleutils.h pageinspect: Fix gist_page_items() with included columns 2023-05-19 12:37:58 +09:00
sampling.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
selfuncs.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
sharedtuplestore.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
snapmgr.h Remove the "snapshot too old" feature. 2023-09-05 19:53:43 +12:00
snapshot.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
sortsupport.h Fix various typos and incorrect/outdated name references 2023-04-19 13:50:33 +12:00
spccache.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
syscache.h Add SysCacheGetAttrNotNull for guaranteed not-null attrs 2023-03-25 22:49:33 +01:00
timeout.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
timestamp.h Add back SQLValueFunction for SQL keywords 2023-05-17 10:19:17 +09:00
tuplesort.h Split out tiebreaker comparisons from comparetup_* functions 2023-08-16 17:15:07 +07:00
tuplestore.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
typcache.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
tzparser.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
usercontext.h Perform logical replication actions as the table owner. 2023-04-04 11:25:23 -04:00
uuid.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
varbit.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
varlena.h Pre-beta mechanical code beautification. 2023-05-19 17:24:48 -04:00
wait_event.h Add system view pg_wait_events 2023-08-20 15:35:02 +09:00
xid8.h Update copyright for 2023 2023-01-02 15:00:37 -05:00
xml.h Support [NO] INDENT option in XMLSERIALIZE(). 2023-03-15 16:59:09 -04:00