Re: BUG #11264: Auto vacuum wraparound job blocking everything

Hi Alvaro,

Here is the output of pg_controldata. We also looked at latest 9.3.5 fix for pg_upgrade and ran the query to check if we have to remove $PGDATA/pg_multixact/offsets/0000, but the query returned false.

pg_control version number: 937
Catalog version number: 201306121
Database system identifier: 6037642065780369403
Database cluster state: in production
pg_control last modified: Tue 26 Aug 2014 02:40:19 PM UTC
Latest checkpoint location: 1054/17E0BE30
Prior checkpoint location: 1054/15B2DEB8
Latest checkpoint's REDO location: 1054/16EC6028
Latest checkpoint's REDO WAL file: 000000010000105400000016
Latest checkpoint's TimeLineID: 1
Latest checkpoint's PrevTimeLineID: 1
Latest checkpoint's full_page_writes: on
Latest checkpoint's NextXID: 0/1004399358
Latest checkpoint's NextOID: 1303270531
Latest checkpoint's NextMultiXactId: 23431
Latest checkpoint's NextMultiOffset: 5678
Latest checkpoint's oldestXID: 801997459
Latest checkpoint's oldestXID's DB: 16428
Latest checkpoint's oldestActiveXID: 1004399358
Latest checkpoint's oldestMultiXid: 1
Latest checkpoint's oldestMulti's DB: 16423
Time of latest checkpoint: Tue 26 Aug 2014 02:37:48 PM UTC
Fake LSN counter for unlogged rels: 0/1
Minimum recovery ending location: 0/0
Min recovery ending loc's timeline: 0
Backup start location: 0/0
Backup end location: 0/0
End-of-backup record required: no
Current wal_level setting: hot_standby
Current max_connections setting: 1024
Current max_prepared_xacts setting: 0
Current max_locks_per_xact setting: 64
Maximum data alignment: 8
Database block size: 8192
Blocks per segment of large relation: 131072
WAL block size: 8192
Bytes per WAL segment: 16777216
Maximum length of identifiers: 64
Maximum columns in an index: 32
Maximum size of a TOAST chunk: 1996
Date/time type storage: 64-bit integers
Float4 argument passing: by value
Float8 argument passing: by value
Data page checksum version: 0

Thanks
Dinesh

-----Original Message-----
From: Alvaro Herrera [mailto:alvherre(at)2ndquadrant(dot)com]
Sent: Monday, August 25, 2014 9:03 PM
To: Dinesh Bhandary
Cc: pgsql-bugs(at)postgresql(dot)org
Subject: Re: [BUGS] BUG #11264: Auto vacuum wraparound job blocking everything

dbhandary(at)switchfly(dot)com wrote:

> I am including debug trace here. It seems like auto vacuum is running
> in an infinite loop. Will be happy to provide more info if necessary.
>
> (gdb) bt
> #0 0x00007fb9740eb5b3 in __select_nocancel () from /lib64/libc.so.6
> #1 0x000000000075ad7a in pg_usleep ()
> #2 0x00000000004ae2d4 in GetMultiXactIdMembers ()
> #3 0x000000000047f6cc in heap_prepare_freeze_tuple ()
> #4 0x000000000057d036 in lazy_vacuum_rel ()

Can you please provide pg_controldata output?

--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services