This could lead to an imprecise choice when splitting an index page of a
GiST index on a tsvector, deciding which entries should remain on the
old page and which entries should move to a new page.
This is wrong since tsearch2 has been moved into core with commit
140d4ebcb4, so backpatch all the way down. This error has been
spotted by valgrind.
Author: Alexander Lakhin
Discussion: https://postgr.es/m/17950-6c80a8d2b94ec695@postgresql.org
Backpatch-through: 11
Dropping a database while a connection is attempted on it was able to
lead to the presence of valid database entries in shared statistics.
The issue is that MyDatabaseId was getting set too early than it should,
as, if the connection attempted on the dropped database fails when
renamed or dropped, the shutdown callback of the shared statistics would
finish by re-inserting a correct entry related to the database already
dropped.
As analyzed by the bug reporters, this issue could lead to phantom
entries in the database list maintained by the autovacuum launcher
(in rebuild_database_list()) if the database dropped was part of the
database list when it was still valid. After the database was dropped,
it would remain the highest on the list of databases to considered by
the autovacuum worker as things to process. This would prevent
autovacuum jobs to happen on all the other databases still present.
The commit fixes this issue by delaying setting MyDatabaseId until the
database existence has been re-checked with the second scan on
pg_database after getting a shared lock on it, and by switching
pgstat_update_dbstats() so as nothing happens if MyDatabaseId is not
valid.
Issue introduced by 5891c7a8ed, so backpatch down to 15.
Reported-by: Will Mortensen, Jacob Speidel
Analyzed-by: Will Mortensen, Jacob Speidel
Author: Andres Freund
Discussion: https://postgr.es/m/17973-bca1f7d5c14f601e@postgresql.org
Backpatch-through: 15
The comment in heapgettup_advance_block() says that it reports the
scan position before checking for end of scan, but that didn't match
the code. The code was refactored in commit 7ae0ab0ad9, which
inadvertently changed the order of the check and reporting. Change it
back.
This caused a few regression test failures with a small shared_buffers
setting like 10 MB. The 'portals' and 'cluster' tests perform seqscans
that are large enough that sync seqscans kick in. When the sync scan
position is not updated at end of scan, the next seq scan doesn't
start at the beginning of the table, and the test queries are
sensitive to that.
Reviewed-by: Melanie Plageman, David Rowley
Discussion: https://www.postgresql.org/message-id/6f991389-ae22-d844-a9d8-9aceb7c01a9a@iki.fi
Backpatch-through: 16
Unlike the other pg_stat_get_backend* functions,
pg_stat_get_backend_subxact() looks up the backend entry by using
its integer argument as a 1-based index in an internal array. The
other functions look for the entry with the matching session
backend ID. These numbers often match, but that isn't reliably
true.
This commit resolves this discrepancy by introducing
pgstat_get_local_beentry_by_backend_id() and using it in
pg_stat_get_backend_subxact(). We cannot use
pgstat_get_beentry_by_backend_id() because it returns a
PgBackendStatus, which lacks the locally computed additions
available in LocalPgBackendStatus that are required by
pg_stat_get_backend_subxact().
Author: Ian Barwick
Reviewed-by: Sami Imseih, Michael Paquier, Robert Haas
Discussion: https://postgr.es/m/CAB8KJ%3Dj-ACb3H4L9a_b3ZG3iCYDW5aEu3WsPAzkm2S7JzS1Few%40mail.gmail.com
Backpatch-through: 16
Presently, pgstat_fetch_stat_beentry() accepts a session's backend
ID as its argument, and pgstat_fetch_stat_local_beentry() accepts a
1-based index in an internal array as its argument. The former is
typically used wherever a user must provide a backend ID, and the
latter is usually used internally when looping over all entries in
the array. This difference was first introduced by d7e39d72ca.
Before that commit, both functions accepted a 1-based index to the
internal array.
This commit renames these two functions to make it clear whether
they use the backend ID or the 1-based index to look up the entry.
This is preparatory work for a follow-up change that will introduce
a function for looking up a LocalPgBackendStatus using a backend
ID.
Reviewed-by: Ian Barwick, Sami Imseih, Michael Paquier, Robert Haas
Discussion: https://postgr.es/m/CAB8KJ%3Dj-ACb3H4L9a_b3ZG3iCYDW5aEu3WsPAzkm2S7JzS1Few%40mail.gmail.com
Backpatch-through: 16
nFreeBlocks, defined as a long, stores the number of free blocks in a
logical tape. ltsGetFreeBlock() has been using an int to store the
value of nFreeBlocks, which could lead to overflows on platforms where
long and int are not the same size (in short everything except Windows
where long is 4 bytes).
The problematic intermediate variable is switched to be a long instead
of an int.
Issue introduced by c02fdc9223, so backpatch down to 13.
Author: Ranier vilela
Reviewed-by: Peter Geoghegan, David Rowley
Discussion: https://postgr.es/m/CAEudQApLDWCBR_xmwNjGBrDo+f+S4E87x3s7-+hoaKqYdtC4JQ@mail.gmail.com
Backpatch-through: 13
The logical_replication_mode GUC is intended for testing and debugging
purposes, but its current name may be misleading and encourage users to make
unnecessary changes.
To avoid confusion, renaming the GUC to a less misleading name
debug_logical_replication_streaming that casual users are less likely to mistakenly
assume needs to be modified in a regular logical replication setup.
Author: Hou Zhijie <houzj.fnst@cn.fujitsu.com>
Reviewed-by: Peter Smith <smithpb2250@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/d672d774-c44b-6fec-f993-793e744f169a%40eisentraut.org
While there are numerous instances of using "power of 2" in the code,
translated user-facing messages use "power of two". Fix two instances
which used "power of 2" instead.
This is a backpatch of 95fff2abee in master.
Author: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Discussion: https://postgr.es/m/20230829.175615.682972421946735863.horikyota.ntt@gmail.com
Backpatch-through: v16
After commit b0bea38705, syslogger prints 63 warnings about failing to
close a listen socket at postmaster startup. That's because the
syslogger process forks before the ListenSockets array is initialized,
so ClosePostmasterPorts() calls "close(0)" 64 times. The first call
succeeds, because fd 0 is stdin.
This has been like this since commit 9a86f03b4e in version 13, which
moved the SysLogger_Start() call to before initializing ListenSockets.
We just didn't notice until commit b0bea38705 added the LOG message.
Reported by Michael Paquier and Jeff Janes.
Author: Michael Paquier
Discussion: https://www.postgresql.org/message-id/ZOvvuQe0rdj2slA9%40paquier.xyz
Discussion: https://www.postgresql.org/message-id/ZO0fgDwVw2SUJiZx@paquier.xyz#482670177eb4eaf4c9f03c1eed963e5f
Backpatch-through: 13
Commit 7b378237aa added a status message to pg_upgrade that is 60
characters wide. Since the MESSAGE_WIDTH macro is currently set to
60, there is no space between this new status message and the "ok"
or "failed" indicator appended when the step completes. To fix
this problem, this commit increases the value of MESSAGE_WIDTH to
62.
Suggested-by: Bharath Rupireddy
Reviewed-by: Peter Eisentraut
Discussion: https://postgr.es/m/CALj2ACVVvk1cYLtWVxHv%3DZ1Ubq%3DUES9fhKbUU4c9k4W%2BfEDnbw%40mail.gmail.com
Backpatch-through: 16
Revalidation of a plancache entry (after a cache invalidation event)
requires acquiring a snapshot. Normally that is harmless, but not
if the cached statement is one that needs to run without acquiring a
snapshot. We were already aware of that for TransactionStmts,
but for some reason hadn't extrapolated to the other statements that
PlannedStmtRequiresSnapshot() knows mustn't set a snapshot. This can
lead to unexpected failures of commands such as SET TRANSACTION
ISOLATION LEVEL. We can fix it in the same way, by excluding those
command types from revalidation.
However, we can do even better than that: there is no need to
revalidate for any statement type for which parse analysis, rewrite,
and plan steps do nothing interesting, which is nearly all utility
commands. To mechanize this, invent a parser function
stmt_requires_parse_analysis() that tells whether parse analysis does
anything beyond wrapping a CMD_UTILITY Query around the raw parse
tree. If that's what it does, then rewrite and plan will just
skip the Query, so that it is not possible for the same raw parse
tree to produce a different plan tree after cache invalidation.
stmt_requires_parse_analysis() is basically equivalent to the
existing function analyze_requires_snapshot(), except that for
obscure reasons that function omits ReturnStmt and CallStmt.
It is unclear whether those were oversights or intentional.
I have not been able to demonstrate a bug from not acquiring a
snapshot while analyzing these commands, but at best it seems mighty
fragile. It seems safer to acquire a snapshot for parse analysis of
these commands too, which allows making stmt_requires_parse_analysis
and analyze_requires_snapshot equivalent.
In passing this fixes a second bug, which is that ResetPlanCache
would exclude ReturnStmts and CallStmts from revalidation.
That's surely *not* safe, since they contain parsable expressions.
Per bug #18059 from Pavel Kulakov. Back-patch to all supported
branches.
Discussion: https://postgr.es/m/18059-79c692f036b25346@postgresql.org
The SnapBuildRestoreContents() used a const value in the error message to
indicate the size in bytes it was expecting to read from the serialized
snapshot file. Fix it by reporting the size that was actually passed.
Author: Hou Zhijie
Reviewed-by: Amit Kapila
Backpatch-through: 16
Discussion: http://postgr.es/m/OS0PR01MB5716D408364F7DF32221C08D941FA@OS0PR01MB5716.jpnprd01.prod.outlook.com
The meson build scripts attempt to find files left over from configure
and fail, mentioning that "make maintainer-clean" should be run to remove
these. This seems to have been done for files generated from configure.
pg_config_paths.h is generated during the actual make build, so seems to
have been missed. This would result in compilation using the wrong
pg_config_paths.h file.
Here we just add this file to generated_sources_ac so that meson errors
out if pg_config_paths.h exists.
Likely this wasn't noticed before because make maintainer-clean will
remove pg_config_paths.h, however, people using the MSVC build scripts
are more likely to run into issues and they have to manually remove
these files and pg_config_paths.h wasn't listed as a conflicting file to
remove in the meson log.
Backpatch-through: 16, where meson support was added
Discussion: https://postgr.es/m/CAApHDvqjYOxZfmLKAOWKFEE7LOr9_E6UA6YNmx9r8nxStcS3gg@mail.gmail.com
See prior commit for an explanation for the goal of the change and why it had
to be split into two commits.
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Nazir Bilal Yavuz <byavuz81@gmail.com>
Discussion: https://postgr.es/m/20230808021541.7lbzdefvma7qmn3w@awork3.anarazel.de
Backpatch: 15-, where CI support was added
cirrus-ci will soon restrict the amount of free resources every user gets (as
have many other CI providers). For most users of CI that should not be an
issue. But e.g. for cfbot it will be an issue.
To allow configuring different resources on a per-repository basis, introduce
infrastructure for overriding the task execution environment. Unfortunately
this is not entirely trivial, as yaml anchors have to be defined before their
use, and cirrus-ci only allows injecting additional contents at the end of
.cirrus.yml.
To deal with that, move the definition of the CI tasks to
.cirrus.tasks.yml. The main .cirrus.yml is loaded first, then, if defined, the
file referenced by the REPO_CI_CONFIG_GIT_URL variable, will be added,
followed by the contents of .cirrus.tasks.yml. That allows
REPO_CI_CONFIG_GIT_URL to override the yaml anchors defined in .cirrus.yml.
Unfortunately git's default merge / rebase strategy does not handle copied
files, just renamed ones. To avoid painful rebasing over this change, this
commit just renames .cirrus.yml to .cirrus.tasks.yml, without adding a new
.cirrus.yml. That's done in the followup commit, which moves the relevant
portion of .cirrus.tasks.yml to .cirrus.yml. Until that is done,
REPO_CI_CONFIG_GIT_URL does not fully work.
The subsequent commit adds documentation for how to configure custom compute
resources to src/tools/ci/README
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Reviewed-by: Nazir Bilal Yavuz <byavuz81@gmail.com>
Discussion: https://postgr.es/m/20230808021541.7lbzdefvma7qmn3w@awork3.anarazel.de
Backpatch: 15-, where CI support was added
The main reason for this change is to reduce different ways of executing
tasks, making it easier to use custom compute resources for cfbot. A secondary
benefit is that the tasks seem slightly faster this way, apparently the
increased startup overhead is outweighed by reduced runtime overhead.
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/20230808021541.7lbzdefvma7qmn3w@awork3.anarazel.de
Backpatch: 15-, where CI support was added
The number of CPUs is the cost-determining factor. Most instance types that
run tests have more memory/core than what we specified, there's no real
benefit in wasting that.
Reviewed-by: Daniel Gustafsson <daniel@yesql.se>
Discussion: https://postgr.es/m/20230808021541.7lbzdefvma7qmn3w@awork3.anarazel.de
Backpatch: 15-, where CI support was added
Some of the ambuildempty functions used smgrwrite() directly, followed
by smgrimmedsync(). A few small problems with that:
Firstly, one is supposed to use smgrextend() when extending a
relation, not smgrwrite(). It doesn't make much difference in
production builds. smgrextend() updates the relation size cache, so
you miss that, but that's harmless because we never use the cached
relation size of an init fork. But if you compile with
CHECK_WRITE_VS_EXTEND, you get an assertion failure.
Secondly, the smgrwrite() calls were performed before WAL-logging, so
the page image written to disk had 0/0 as the LSN, not the LSN of the
WAL record. That's also harmless in practice, but seems sloppy.
Thirdly, it's better to use the buffer cache, because then you don't
need to smgrimmedsync() the relation to disk, which adds latency.
Bypassing the cache makes sense for bulk operations like index
creation, but not when you're just initializing an empty index.
Creation of unlogged tables is hardly performance bottleneck in any
real world applications, but nevertheless.
Backpatch to v16, but no further. These issues should be harmless in
practice, so better to not rock the boat in older branches.
Reviewed-by: Robert Haas
Discussion: https://www.postgresql.org/message-id/6e5bbc08-cdfc-b2b3-9e23-1a914b9850a9@iki.fi
The list of external language drivers and procedural languages was
never complete or exhaustive, and rather than attempting to manage
it the content has migrated to the wiki. This replaces the tables
altogether with links to the wiki as we regularly get requests for
adding various projects, which we reject without any clear policy
for why or how the content should be managed.
The threads linked to below are the most recent discussions about
this, the archives contain many more.
Backpatch to all supported branches since the list on the wiki
applies to all branches.
Author: Jonathan Katz <jkatz@postgresql.org>
Discussion: https://postgr.es/m/169165415312.635.10247434927885764880@wrigleys.postgresql.org
Discussion: https://postgr.es/m/169177958824.635.11087800083040275266@wrigleys.postgresql.org
Backpatch-through: v11
Commit 31966b15 invented a way for functions dealing with relation
extension to accept a Relation in online code and an SMgrRelation in
recovery code. It seems highly likely that future bufmgr.c interfaces
will face the same problem, and need to do something similar.
Generalize the names so that each interface doesn't have to re-invent
the wheel.
Back-patch to 16. Since extension AM authors might start using the
constructor macros once 16 ships, we agreed to do the rename in 16
rather than waiting for 17.
Reviewed-by: Peter Geoghegan <pg@bowt.ie>
Reviewed-by: Andres Freund <andres@anarazel.de>
Discussion: https://postgr.es/m/CA%2BhUKG%2B6tLD2BhpRWycEoti6LVLyQq457UL4ticP5xd8LqHySA%40mail.gmail.com
Attribute missing values might be needed past the lifetime of the tuple
descriptors from which they are extracted. To avoid possibly using
pointers for by-reference values which might thus be left dangling, we
cache a datumCopy'd version of the datum in the TopMemoryContext. Since
we first search for the value this only needs to be done once per
session for any such value.
Original complaint from Tom Lane, idea for mitigation by Andrew Dunstan,
tweaked by Tom Lane.
Backpatch to version 11 where missing values were introduced.
Discussion: https://postgr.es/m/1306569.1687978174@sss.pgh.pa.us
Peter Eisentraut