Hi, While the system is idle, we skip duplicate checkpoints for some reasons. But when wal_level is set to hot_standby, I found that checkpoints are wrongly duplicated even while the system is idle. The cause is that XLOG_RUNNING_XACTS WAL record always follows CHECKPOINT one when wal_level is set to hot_standby. So the subsequent checkpoint wrongly thinks that there is inserted record (i.e., XLOG_RUNNING_XACTS record) since the start of the last checkpoint, the system is not idle, and this checkpoint cannot be skipped. Is this intentional behavior? Or a bug?
Regards, -- Fujii Masao NIPPON TELEGRAPH AND TELEPHONE CORPORATION NTT Open Source Software Center -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
