I had one simple query that kept crashing the connection. It crashes after
several minutes.
Tried restarting, it still error'd at the same place.
Tried recreating the table it was selecting from, it still error'd at the
same place.
I rewrote the query with an ARRAY subselect and it finished flawlessly in a
few seconds.
There is about 4 million records in the table its selecting from. No array
ends up with more than 4 elements.
For some reason, the log indicates this is causing an issue with
autovacuum.it says it was -9'd, but it wasn't by or any other physical
person.
Here is the problem query.
create table public.temptrips
as
select trip_id,array_agg(customer_upload_id)
from
trip_ids_to_customer_upload_ids
group by trip_id;
server closed the connection unexpectedly
This probably means the server terminated abnormally
before or while processing the request.
The connection to the server was lost. Attempting reset: Failed.
!>
LOG: 00000: autovacuum launcher process (PID 10264) was terminated by
signal 9: Killed
2009-07-21 08:44:26 EDT - LOCATION: LogChildExit, postmaster.c:2673
2009-07-21 08:44:26 EDT - LOG: 00000: terminating any other active
server processes
2009-07-21 08:44:26 EDT - LOCATION: HandleChildCrash, postmaster.c:2500
2009-07-21 08:44:26 EDT - WARNING: 57P02: terminating connection because
of crash of another server process
2009-07-21 08:44:26 EDT - DETAIL: The postmaster has commanded this
server process to roll back the current transaction and exit, because
another server process exited abnormally and possibly corrupted shared
memory.
2009-07-21 08:44:26 EDT - HINT: In a moment you should be able to
reconnect to the database and repeat your command.
2009-07-21 08:44:26 EDT - LOCATION: quickdie, postgres.c:2495
2009-07-21 08:44:27 EDT - postgres postgres /usr/local/pgsql/bin/postmaster
FATAL: 57P03: the database system is in recovery mode
2009-07-21 08:44:27 EDT - postgres postgres /usr/local/pgsql/bin/postmaster
LOCATION: ProcessStartupPacket, postmaster.c:1721
2009-07-21 08:44:26 EDT - postgres postgres startup WARNING: 57P02:
terminating connection because of crash of another server process
2009-07-21 08:44:27 EDT - postgres postgres startup DETAIL: The postmaster
has commanded this server process to roll back the current transaction and
exit, because another server process exited abnormally and possibly
corrupted shared memory.
2009-07-21 08:44:27 EDT - postgres postgres startup HINT: In a moment you
should be able to reconnect to the database and repeat your command.
2009-07-21 08:44:27 EDT - postgres postgres startup LOCATION: quickdie,
postgres.c:2495
2009-07-21 08:44:28 EDT - LOG: 00000: all server processes terminated;
reinitializing
2009-07-21 08:44:28 EDT - LOCATION: PostmasterStateMachine,
postmaster.c:2858
2009-07-21 08:44:28 EDT - LOG: 00000: database system was interrupted;
last known up at 2009-07-21 08:41:32 EDT
2009-07-21 08:44:28 EDT - LOCATION: StartupXLOG, xlog.c:5236
2009-07-21 08:44:28 EDT - LOG: 00000: database system was not properly
shut down; automatic recovery in progress
2009-07-21 08:44:28 EDT - LOCATION: StartupXLOG, xlog.c:5410
2009-07-21 08:44:28 EDT - LOG: 00000: redo starts at 76/4380AC70
2009-07-21 08:44:28 EDT - LOCATION: StartupXLOG, xlog.c:5493
2009-07-21 08:44:29 EDT - LOG: 00000: record with zero length at
76/438869D0
2009-07-21 08:44:29 EDT - LOCATION: ReadRecord, xlog.c:3532
2009-07-21 08:44:29 EDT - LOG: 00000: redo done at 76/438869A0
2009-07-21 08:44:29 EDT - LOCATION: StartupXLOG, xlog.c:5625
2009-07-21 08:44:29 EDT - LOG: 00000: last completed transaction was at
log time 2009-07-21 08:41:49.707423-04
2009-07-21 08:44:29 EDT - LOCATION: StartupXLOG, xlog.c:5629
2009-07-21 08:44:30 EDT - LOG: 00000: autovacuum launcher started
2009-07-21 08:44:30 EDT - LOCATION: AutoVacLauncherMain,
autovacuum.c:529
2009-07-21 08:44:30 EDT - LOG: 00000: database system is ready to accept
connections
2009-07-21 08:44:30 EDT - LOCATION: reaper, postmaster.c:2272
It looks like this is causing the autovacuum to crash, what could cause
this?
postgres=# select version();
version
----------------------------------------------------------------------------
------------------------------------------
PostgreSQL 8.4.0 on x86_64-unknown-linux-gnu, compiled by GCC gcc (GCC)
3.4.6 20060404 (Red Hat 3.4.6-8.0.1), 64-bit
(1 row)
Chris
