Что за interrupted вылезает в логах?
Работа происходит с 1 таблицей (только insert), работает работает и тут бац такое, после этого sequence_id в таблице подскакивает ровно на 33 вперёд.

version
PostgreSQL 7.4.7 on i386-pc-linux-gnu, compiled by GCC i386-linux-gcc (GCC) 3.3.5 (Debian 1:3.3.5-12)

2006-03-03 09:06:34 [1593] LOG: database system was interrupted at 2006-03-03 09:02:14 MSK
2006-03-03 09:06:34 [1593] LOG: checkpoint record is at 0/7FB3FB0
2006-03-03 09:06:34 [1593] LOG: redo record is at 0/7FB3FB0; undo record is at 0/0; shutdown FALSE
2006-03-03 09:06:34 [1593] LOG: next transaction ID: 238024; next OID: 229904
2006-03-03 09:06:34 [1593] LOG: database system was not properly shut down; automatic recovery in progress
2006-03-03 09:06:34 [1593] LOG: redo starts at 0/7FB4010
2006-03-03 09:06:34 [1593] LOG: record with zero length at 0/7FB8198
2006-03-03 09:06:34 [1593] LOG: redo done at 0/7FB8174
2006-03-03 09:06:37 [1593] LOG: database system is ready
2006-03-03 09:06:40 [1629] LOG: connection received: host=[local] port=
2006-03-03 09:06:40 [1629] LOG: connection authorized: user=root database=esme
2006-03-03 10:02:02 [1760] LOG: connection received: host=[local] port=
2006-03-03 10:02:02 [1760] LOG: connection authorized: user=postgres database=template1
2006-03-03 10:02:03 [1769] LOG: connection received: host=[local] port=
2006-03-03 10:02:03 [1769] LOG: connection authorized: user=postgres database=template1
2006-03-03 10:02:03 [1770] LOG: connection received: host=[local] port=
2006-03-03 10:02:03 [1770] LOG: connection authorized: user=postgres database=esme
2006-03-03 10:02:05 [1771] LOG: connection received: host=[local] port=
2006-03-03 10:02:05 [1771] LOG: connection authorized: user=postgres database=template1
2006-03-03 10:12:04 [1773] LOG: recycled transaction log file "0000000000000007"
2006-03-03 10:31:17 [1588] LOG: database system was interrupted at 2006-03-03 10:27:10 MSK
2006-03-03 10:31:17 [1588] LOG: checkpoint record is at 0/80AE7B0
2006-03-03 10:31:17 [1588] LOG: redo record is at 0/80AE7B0; undo record is at 0/0; shutdown FALSE
2006-03-03 10:31:17 [1588] LOG: next transaction ID: 238250; next OID: 238096
2006-03-03 10:31:17 [1588] LOG: database system was not properly shut down; automatic recovery in progress
2006-03-03 10:31:17 [1588] LOG: redo starts at 0/80AE7F0
2006-03-03 10:31:17 [1588] LOG: record with zero length at 0/80B2978
2006-03-03 10:31:17 [1588] LOG: redo done at 0/80B2954
2006-03-03 10:31:20 [1588] LOG: database system is ready