Display explain buffers measurements in memory units rather than blocks. Also show "Total Buffer Usage" to hint that these are totals not averages per loop

all the data and using posix_fadvise to nudge the OS into flushing it
earlier. This also hopefully makes CREATE DATABASE avoid spamming the
cache.

Tests show a big speedup on Linux at least on some filesystems.

Idea and patch from Andres Freund.

The purpose of this change is to eliminate the need for every caller
of SearchSysCache, SearchSysCacheCopy, SearchSysCacheExists,
GetSysCacheOid, and SearchSysCacheList to know the maximum number
of allowable keys for a syscache entry (currently 4).  This will
make it far easier to increase the maximum number of keys in a
future release should we choose to do so, and it makes the code
shorter, too.

Design and review by Tom Lane.

directory and not just the individual files.

Back-patch to 8.1 -- before that we just called "cp -r" and never
fsynced anything anyways.

prefix, instead of assuming it will always be following the default layout.

All information we need is not available on Windows, but the number of
assumptions are at least fewer this way than before.

Based on suggestions from James William Pye.

defined.  Its reference to CurrentMemoryContext causes link failures on some
platforms, evidently because the inline function gets compiled despite lack of
use.  Per buildfarm member warthog.

Message is reset earlier and potential bug avoided.

Andres Freund

where a database has a non-default tablespaceid. Pass thru MyDatabaseId
and MyDatabaseTableSpace to allow file path to be re-created in
standby and correct invalidation to take place in all cases.
Update and rework xact_commit_desc() debug messages.
Bug report from Tom by code inspection. Fix by me.

compilers, by applying a configure check to see if the compiler will accept
an unreferenced "static inline foo ..." function without warnings.  It is
believed that such warnings are the only reason not to declare inlined
functions in headers, if the compiler understands "inline" at all.

Kurt Harriman

process. If startup waits on a buffer pin we send a request to all
backends to cancel themselves if they are holding the buffer pin
required and they are also waiting on a lock. If not, startup waits
until max_standby_delay before cancelling any backend waiting for
the requested buffer pin.

resolution during Hot Standby. Page reuse interlock requested by Tom.
Analysis and patch by me.

before we start analyzing the parent statement.  This is to make it
more clear that the WITH isn't affected by anything in the parent.
I don't believe there's any actual bug here, because the stuff that
was being done before WITH didn't affect subqueries; but it's certainly
a potential for error (and apparently misled Marko into committing some
real errors...).

that happens to be composite itself.  Per bug #5314 from Oleg Serov.

Backpatch to 8.0 --- 7.4 has got too many other shortcomings in
composite-type support to make this worth worrying about in that branch.

Add plperl.on_plperl_init and plperl.on_plperlu_init settings for language-specific startup. Rename recently added plperl.on_perl_init to plperl.on_init. Also, code cleanup for utf8 hack. Patch from Tim Bunce, reviewed by Alex Hunsaker.

This patch allows the frame to start from CURRENT ROW (in either RANGE or
ROWS mode), and it also adds support for ROWS n PRECEDING and ROWS n FOLLOWING
start and end points.  (RANGE value PRECEDING/FOLLOWING isn't there yet ---
the grammar works, but that's all.)

Hitoshi Harada, reviewed by Pavel Stehule

messages printed at startup. As pointed out by Simon Riggs.

echo all the recovery.conf options. Don't emit the "initializing
recovery connections" message, which doesn't mean anything to a user.
Remove the "starting archive recovery" message and replace the
"automatic recovery in progress" message with a more informative message
saying whether the server is doing PITR, normal archive recovery, or
standby mode.

needs to be done, but it's a step forward..

connection.

a partial WAL file, assume it's because the file is just being copied to
the archive and treat it the same as "file not found" in standby mode.
pg_standby has a similar check, so it seems reasonable to have the same
level of protection in the built-in standby mode.

into code recently patched by Andres Freund, so quickly fixed by him
when bug report from Tatsuo Ishii arrived.

several places, but for now only GIN uses it during index creation.
Using self-balanced tree greatly speeds up index creation in corner cases
with preordered data.

restoring from archive, the last WAL segment is not necessarily open at
the end of recovery. Fix assertion that assumed that.

Fujii Masao, fixing the assertion failure reported by Martin Pihlak.

The previous coding missed a bet by sometimes picking the "sorted" path
from query_planner even though hashing would be preferable.  To fix, we have
to be willing to make the choice sooner.  This contorts things a little bit,
but I thought of a factorization that makes it not too awful.

Move rd_targblock, rd_fsm_nblocks, and rd_vm_nblocks from relcache to the smgr
relation entries, so that they will get reset to InvalidBlockNumber whenever
an smgr-level flush happens.  Because we now send smgr invalidation messages
immediately (not at end of transaction) when a relation truncation occurs,
this ensures that other backends will reset their values before they next
access the relation.  We no longer need the unreliable assumption that a
VACUUM that's doing a truncation will hold its AccessExclusive lock until
commit --- in fact, we can intentionally release that lock as soon as we've
completed the truncation.  This patch therefore reverts (most of) Alvaro's
patch of 2009-11-10, as well as my marginal hacking on it yesterday.  We can
also get rid of assorted no-longer-needed relcache flushes, which are far more
expensive than an smgr flush because they kill a lot more state.

In passing this patch fixes smgr_redo's failure to perform visibility-map
truncation, and cleans up some rather dubious assumptions in freespace.c and
visibilitymap.c about when rd_fsm_nblocks and rd_vm_nblocks can be out of
date.

while it's still being used.

Backpatch to 8.4, where the fake relcache method was introduced.

only in the header files and not in any libraries, yet declare it as
an extern.

sections under "High Availability, Load Balancing, and Replication"
chapter. Streaming replication chapter needs a lot more work, but this
commit just moves things around.

First try to make this one ecpg regression test work on Windows too. I'm just trying to figure out the minimal amount of defines needed.

truncating the table and transaction commit.  This isn't really making
it safe, but at least there is no good reason to do free space map
cleanup within the risk window.  Don't lock out cancel interrupts
until we have to, either.

being called as aggregates, and to get the aggregate transition state memory
context if needed.  Use it instead of poking directly into AggState and
WindowAggState in places that shouldn't know so much.

We should have done this in 8.4, probably, but better late than never.

Revised version of a patch by Hitoshi Harada.