Thanks Amit, I understand now. Is there a way to know/predict how many prealocated segments will there be in a certain moment? What does it deppend on?
On Fri, May 24, 2013 at 12:46 PM, Amit Langote <amitlangot...@gmail.com>wrote: > > I didn't quite understand what you mean by that... But anyways so do you > > people think this sequence number overlap is "normal" ? > > There is "no overlap" at all. The newer segments that you see are > "pre-allocated" ones. They have not been written to yet. > > From the "ls -l pg_xlog" output that you sent, it can be seen that > segments starting from 000000010000000E000000A8 through > 00000001000000100000007E have been pre-allocated (at that point of > time) and 000000010000000E000000A7 is currently being written to. Just > look at the modified times in your "ls -l" listing. > 000000010000000E000000A7 has May 22 15:32 (the latest writes seem to > have happened to this segment) whereas pre-allocated ones seem to have > around May 22 12:05 to 12:15 (which are yet to be written to). > > Does that help? > > -- > Amit Langote >
