Re: [PERFORM] Performance on Win32 vs Cygwin
Tom Lane <[email protected]>
| Newsgroups | gmane.comp.db.postgresql.devel.win32,gmane.comp.db.postgresql.performance |
|---|---|
| Message-ID | <[email protected]> |
"Merlin Moncure" <[email protected]> writes: > I'm pretty certain that previous to 8.0 no win32 based postgesql > properly sync()ed the files. Win32 does not have sync(), and it is > impossible to emulate it without relying on the application to track > which files to sync. 8.0 does this because it fsync()s the files > individually. Therefore, benchmarking fsync=on on 8.0 to a <8.0 version > of windows is not apples to apples. This includes, by the way, the SFU > based port of postgresql because they didn't implement sync() there, > either. This is all true, but for performance testing I am not sure that you'd notice much difference, because the sync or lack of it only happens within checkpoints. regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 1: subscribe and unsubscribe commands go to [email protected]