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Re: Serious WAPL performance problems
On Tue, Oct 23, 2012 at 06:51:18PM +0200, Edgar Fuß wrote:
> Tracing that svn update (both ktrace and tcpdump) reveals the unusual thing
> does ist creating some 2,500 .lock files scattered around the directory tree
> only to unlink all of them just seconds later.
Also look for sync calls. The likely problem is that it requires a lot
of WAPBL transactions and unlike softdep, WAPBL forces a cache flush.
To verify this, try setting vfs.wapbl.flush_disk_cache=0 on the server.
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