Re: Apparent Wraparound?

On Jun 18, 10:44 pm, alvhe(dot)(dot)(dot)(at)commandprompt(dot)com (Alvaro Herrera)
wrote:

>
> Please check "MultiXact" id consumption. Do you mean that your server
> has crashed?
>
How do I check MilitXact id consumption ? Is it "Latest checkpoint's
NextXID:" in the output of pg_controldata ?

transaction id consumption is ~ 350000 per day (extrapolated from 16
hours).
No, the Server has been up for about 2 month (regular reboot due to
kernel and postgresql upgrade to 8.1.8), was running before for 7
month flawless, and before that i migrated from 8.0 to 8.1.4 with a
complete dump/restore).

pg_multixact/members shows:
-rw------- 1 postgres postgres 8192 Aug 30 2006 0000
pg_multixact/offsets shows:
-rw------- 1 postgres postgres 8192 Apr 13 15:03 0000

pg_controldata shows:
pg_control version number: 812
Catalog version number: 200510211
Database system identifier: 4969068620492422615
Database cluster state: in production
pg_control last modified: Tue Jun 19 08:00:36 2007
Current log file ID: 10
Next log file segment: 102
Latest checkpoint location: A/65362150
Prior checkpoint location: A/652E091C
Latest checkpoint's REDO location: A/65362150
Latest checkpoint's UNDO location: 0/0
Latest checkpoint's TimeLineID: 1
Latest checkpoint's NextXID: 99983151
Latest checkpoint's NextOID: 7758309
Latest checkpoint's NextMultiXactId: 1
Latest checkpoint's NextMultiOffset: 0
Time of latest checkpoint: Tue Jun 19 08:00:36 2007
Maximum data alignment: 4
Database block size: 8192
Blocks per segment of large relation: 131072
Bytes per WAL segment: 16777216
Maximum length of identifiers: 64
Maximum columns in an index: 32
Date/time type storage: floating-point numbers
Maximum length of locale name: 128
LC_COLLATE: C
LC_CTYPE: C

regards
Gerhard