Hi, Has anyone measured the cost of creating empty WAL segments while the database is running? Actually, when is the new file created? Just after one segment is filled up, or some time before then? What happens during WAL segment creation? If there are pending transactions to be committed, do we see a delay? I was looking at how Oracle manages this, and I was told that you can create empty segments during installation, so I'm wondering whether it might be a good addition to initdb or not: initdb -S 30 -- create 30 empty segments during initdb Regards, -- Devrim GÜNDÜZ Principal Systems Engineer @ EnterpriseDB: http://www.enterprisedb.com PostgreSQL Danışmanı/Consultant, Red Hat Certified Engineer Community: devrim~PostgreSQL.org, devrim.gunduz~linux.org.tr http://www.gunduz.org Twitter: http://twitter.com/devrimgunduz
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