David Pacheco wrote: > tl;dr: We've found that under many conditions, PostgreSQL's re-use of old > WAL > files appears to significantly degrade query latency on ZFS. The reason is > complicated and I have details below. Has it been considered to make this > behavior tunable, to cause PostgreSQL to always create new WAL files > instead of re-using old ones? I don't think this has ever been proposed, because there was no use case for it. Maybe you want to work on a patch for it? -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
