upstream/postgresql
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2026-02-26 11:21:03 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions
postgresql/src/include
History
Andres Freund d1aac29987 Prevent growth of simplehash tables when they're "too empty". 
In cases where simplehash tables where filled with either a lot of
conflicting hash-values, or values that hash to consecutive
values (i.e. build "chains") the growth heuristics in
d4c62a6b62 could trigger rather
explosively.

To fix that, address some of the reasons (see previous commit) of why
the growth heuristics where needed, and only allow growth when the
table isn't too empty. While that means there's a few cases of bad
input that can be slower, that seems a lot better than running very
quickly out of memory.

Author: Tomas Vondra and Andres Freund, with additional input by
    Thomas Munro, Tom Lane Todd A. Cook
Reported-By: Todd A. Cook, Tomas Vondra, Thomas Munro
Discussion: https://postgr.es/m/20171127185700.1470.20362@wrigleys.postgresql.org
Backpatch: 10, where simplehash was introduced
2018-01-29 11:24:57 -08:00
..
access Report an ERROR if a parallel worker fails to start properly. 2018-01-23 11:13:42 -05:00
bootstrap Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
catalog Always require SELECT permission for ON CONFLICT DO UPDATE. 2017-11-06 09:17:44 +00:00
commands Mark assorted variables PGDLLIMPORT. 2017-12-05 09:24:05 -05:00
common Increase SCRAM salt length 2017-08-24 14:08:23 -04:00
datatype Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
executor Fix crash when logical decoding is invoked from a PL function. 2017-10-06 19:18:58 -04:00
fe_utils Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
foreign Separate reinitialization of shared parallel-scan state from ExecReScan. 2017-08-30 13:18:16 -04:00
lib Prevent growth of simplehash tables when they're "too empty". 2018-01-29 11:24:57 -08:00
libpq Always use 2048 bit DH parameters for OpenSSL ephemeral DH ciphers. 2017-07-31 22:36:09 +03:00
mb Phase 3 of pgindent updates. 2017-06-21 15:35:54 -04:00
nodes Move new structure member to the end. 2017-10-27 17:29:52 +02:00
optimizer Fix creation of resjunk tlist entries for inherited mixed UPDATE/DELETE. 2017-11-27 17:54:09 -05:00
parser Phase 3 of pgindent updates. 2017-06-21 15:35:54 -04:00
port Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
portability Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
postmaster Mark assorted variables PGDLLIMPORT. 2017-12-05 09:24:05 -05:00
regex Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
replication Fix failure to delete spill files of aborted transactions 2018-01-05 12:17:10 -03:00
rewrite Fix creation of resjunk tlist entries for inherited mixed UPDATE/DELETE. 2017-11-27 17:54:09 -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 Mark assorted variables PGDLLIMPORT. 2017-12-05 09:24:05 -05:00
tcop Mark assorted variables PGDLLIMPORT. 2017-12-05 09:24:05 -05:00
tsearch Fix serious performance problems in json(b) to_tsvector(). 2017-07-18 12:45:51 -04:00
utils Backport: Add inline murmurhash32(uint32) function. 2018-01-29 11:24:57 -08:00
.gitignore Autoconfiscate selection of 64-bit int type for 64-bit large object API. 2012-10-07 21:52:43 -04:00
c.h Prevent int128 from requiring more than MAXALIGN alignment. 2017-11-14 17:49:49 -05:00
fmgr.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
funcapi.h Add a utility function to extract variadic function arguments 2017-10-25 07:14:21 -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 Mark assorted variables PGDLLIMPORT. 2017-12-05 09:24:05 -05:00
pg_config.h.in Prevent int128 from requiring more than MAXALIGN alignment. 2017-11-14 17:49:49 -05:00
pg_config.h.win32 Prevent int128 from requiring more than MAXALIGN alignment. 2017-11-14 17:49:49 -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 Fix default minimum value for descending sequences 2017-01-23 14:00:58 -05:00
pg_getopt.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pg_trace.h Phase 2 of pgindent updates. 2017-06-21 15:19:25 -04:00
pgstat.h Fix replication origin-related race conditions 2017-08-08 16:07:46 -04:00
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 Change pg_ctl to detect server-ready by watching status in postmaster.pid. 2017-06-28 17:31:32 -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