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Alexander Korotkov cd24b4eaec Prevent GIN deleted pages from being reclaimed too early 
When GIN vacuum deletes a posting tree page, it assumes that no concurrent
searchers can access it, thanks to ginStepRight() locking two pages at once.
However, since 9.4 searches can skip parts of posting trees descending from the
root.  That leads to the risk that page is deleted and reclaimed before
concurrent search can access it.

This commit prevents the risk of above by waiting for every transaction, which
might wait to reference this page, to finish.  Due to binary compatibility
we can't change GinPageOpaqueData to store corresponding transaction id.
Instead we reuse page header pd_prune_xid field, which is unused in index pages.

Discussion: https://postgr.es/m/31a702a.14dd.166c1366ac1.Coremail.chjischj%40163.com
Author: Andrey Borodin, Alexander Korotkov
Reviewed-by: Alexander Korotkov
Backpatch-through: 9.4
2018-12-13 06:47:38 +03:00
..
access Prevent GIN deleted pages from being reclaimed too early 2018-12-13 06:47:38 +03:00
bootstrap Update copyright for 2016 2016-01-02 13:33:40 -05:00
catalog Fix missing role dependencies for some schema and type ACLs. 2018-11-09 20:42:03 -05:00
commands Mark assorted variables PGDLLIMPORT. 2017-12-05 09:27:20 -05:00
common Fix integer-overflow problems in interval comparison. 2017-04-05 23:51:28 -04:00
datatype Be more careful about out-of-range dates and timestamps. 2016-03-16 19:09:28 -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 07:39:48 -08:00
foreign Remove GetUserMappingId() and GetUserMappingById(). 2016-07-22 11:32:23 -04:00
lib Revert "Permit dump/reload of not-too-large >1GB tuples" 2016-12-06 12:46:03 -03:00
libpq Give nicer error message when connecting to a v10 server requiring SCRAM. 2017-05-05 11:24:02 +03:00
mb Update copyright for 2016 2016-01-02 13:33:40 -05:00
nodes Change more places to be less trusting of RestrictInfo.is_pushed_down. 2018-04-20 15:19:17 -04:00
optimizer Repair bogus EPQ plans generated for postgres_fdw foreign joins. 2018-12-12 16:08:30 -05:00
parser Fix INSERT ON CONFLICT UPDATE through a view that isn't just SELECT *. 2018-08-04 19:38:58 -04:00
port Remove overzeleous assertions in pg_atomic_flag code. 2018-04-07 18:30:15 -07:00
portability Update copyright for 2016 2016-01-02 13:33:40 -05:00
postmaster Mark assorted variables PGDLLIMPORT. 2017-12-05 09:27:20 -05:00
regex Suppress compiler warnings about useless comparison of unsigned to zero. 2016-02-15 17:12:16 -05:00
replication Fix "base" snapshot handling in logical decoding 2018-06-26 16:38:34 -04:00
rewrite Fix creation of resjunk tlist entries for inherited mixed UPDATE/DELETE. 2017-11-27 17:54:10 -05:00
snowball Update copyright for 2016 2016-01-02 13:33:40 -05:00
storage PANIC on fsync() failure. 2018-11-19 13:54:00 +13:00
tcop Fix event triggers for partitioned tables 2018-10-06 19:17:46 -03:00
tsearch Fix typos in comments. 2017-02-06 11:34:15 +02:00
utils Fix missing role dependencies for some schema and type ACLs. 2018-11-09 20:42:03 -05:00
.gitignore Autoconfiscate selection of 64-bit int type for 64-bit large object API. 2012-10-07 21:52:43 -04:00
c.h Allow btree comparison functions to return INT_MIN. 2018-10-05 16:01:30 -04:00
fmgr.h Revert addition of PGDLLEXPORT in PG_FUNCTION_INFO_V1 macro. 2016-10-12 18:01:52 -04:00
funcapi.h Add a utility function to extract variadic function arguments 2017-10-25 07:19:59 -04:00
getaddrinfo.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
getopt_long.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
Makefile Create src/fe_utils/, and move stuff into there from pg_dump's dumputils. 2016-03-24 15:55:57 -04:00
miscadmin.h Mark assorted variables PGDLLIMPORT. 2017-12-05 09:27:20 -05:00
pg_config.h.in Fix detection of the result type of strerror_r(). 2018-09-30 16:24:56 -04:00
pg_config.h.win32 Stamp 9.6.11. 2018-11-05 16:47:37 -05:00
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 Bring some clarity to the defaults for the xxx_flush_after parameters. 2016-11-25 18:36:10 -05:00
pg_getopt.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
pg_trace.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
pgstat.h Fix typos in comments. 2016-10-26 11:13:17 +03:00
pgtar.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
pgtime.h Mark assorted variables PGDLLIMPORT. 2017-12-05 09:27:20 -05:00
port.h Run the postmaster's signal handlers without SA_RESTART. 2017-04-24 13:00:23 -04:00
postgres.h Adjust DatumGetBool macro, this time for sure. 2016-04-28 11:50:58 -04:00
postgres_ext.h Add a nonlocalized version of the severity field to client error messages. 2016-08-26 16:20:24 -04:00
postgres_fe.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
rusagestub.h Update copyright for 2016 2016-01-02 13:33:40 -05:00
windowapi.h Update copyright for 2016 2016-01-02 13:33:40 -05:00