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 -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general