Re: Serious WAPL performance problems

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

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 
> it 
> 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.

Joerg