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Re: MultiXact member wraparound protections are disabled

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AnandKumar, Karthik wrote:
> root@site-db01a:/var/lib/pgsql/cmates/data # ls pg_multixact/members
> 0000  0001  0002  0003  0004  0005  0006  0007  0008  0009  000A  000B  000C  000D  000E  000F  0010  0011  0012  0013  0014  0015  0016  0017  0018  0019  001A  001B
> root@site-db01a:/var/lib/pgsql/cmates/data # ls pg_multixact/offsets
> 0001  0002  0003  0004  0005  0006  0007  0008  0009  000A  000B

> postgres@site-db01a:~ $ /usr/pgsql-9.4/bin/pg_controldata /var/lib/pgsql/cmates/data

> Latest checkpoint's NextMultiXactId:  784503
> Latest checkpoint's NextMultiOffset:  1445264
> Latest checkpoint's oldestMultiXid:   1
> Latest checkpoint's oldestMulti's DB: 16457

This looks perfectly normal, except that the pg_multixact/offsets/0000
file is gone.  oldestMultiXid is 1 so I don't see how could have the
file gotten removed.  Has this been upgraded recently from a previous
9.3 or 9.4 version?  There have been bugs in this area but they've been
fixed now for some time.

The 0000 file could have been removed manually, perhaps?

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


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