[svlug] Sync command slowdown

[James Sparenberg]

On Monday 24 November 2008 18:30:56 Brian J. Tarricone wrote:
> Greg Lindahl wrote:
> 
> > sync is a big club: it syncs all the files in the system instead of
> > just the ones you care about. And it can kill performance for other
> > processes if there are a lot of pages to be written out.
> 
> Though, if you're using ext3, a whole-disk sync() and a single-file 
> fsync() are sadly equivalent with certain (common?) journaling modes.
> 
> (See the not-so-recent Firefox 3 bug[1] relating to fsync() when 
> committing various sqlite databases to disk.)
> 
> 	-brian
> 
> [1] https://bugzilla.mozilla.org/show_bug.cgi?id=421482
> 
> 
> _______________________________________________
> svlug mailing list
> svlug at lists.svlug.org
> http://lists.svlug.org/lists/listinfo/svlug
> 

Ok,  Following bugs and links I found this bug in the kernel

http://bugzilla.kernel.org/show_bug.cgi?id=9546

This seems to match identically what I've got going on.  I've now setup 
the test system to where all partitions are running in the writeback 
mode, for the journal instead of the default ordered mode.  Finger 
crossed.

Again all thanks!

James