> In case of WAL per database, the operations done on a shared catalog from a > backend would need flushing system WAL and database WAL to ensure such > transaction commit. Otherwise only flushing database WAL would do.
I don't think that is a good idea. If you want databases separated you should install more than one instance. That gives you way more flexibility. Imho per database WAL is a deficiency, not a feature. Andreas PS: problem with mmap was, that it has no attached process count ---------------------------(end of broadcast)--------------------------- TIP 6: Have you searched our list archives? http://archives.postgresql.org