Re: Spread checkpoint sync - Mailing list pgsql-hackers

From Josh Berkus
Subject Re: Spread checkpoint sync
Date
Msg-id 4CF7F826.1060301@agliodbs.com
Whole thread Raw
In response to Re: Spread checkpoint sync  (Greg Stark <gsstark@mit.edu>)
List pgsql-hackers
> Using sync_file_range you can specify the set of blocks to sync and
> then block on them only after some time has passed. But there's no
> documentation on how this relates to the I/O scheduler so it's not
> clear it would have any effect on the problem. We might still have to
> delay the begining of the sync to allow the dirty blocks to be synced
> naturally and then when we issue it still end up catching a lot of
> other i/o as well.

This *really* sounds like we should be working with the FS geeks on
making the OS do this work for us.  Greg, you wanna go to LinuxCon next
year?

--                                  -- Josh Berkus                                    PostgreSQL Experts Inc.
                        http://www.pgexperts.com
 


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