Re: tstile lockup

[Lars Heidieker <lars%heidieker.de@localhost>]

On 11/23/2012 05:06 PM, Edgar Fuß wrote:
>> Try running `svn ...' as `lockstat -T rwlock svn ...'.  By chance we get more
>> information on lock congestion.
> Ouch! I overlooked this post of yours until a colleague asked me about it.
> 
> Elapsed time: 18.33 seconds.
> 
> -- RW lock sleep (reader)
> 
> Total%  Count   Time/ms          Lock                       Caller
> ------ ------- --------- ---------------------- ------------------------------
> 100.00       1  11696.42 fffffe8419e266f8       wapbl_begin+54
> 
> Does that help?
> 

Hi,

there is one rw_lock that is taken in read mode in wapbl_begin and that
lock is hold in writer mode across log flushing.
So while flushing a transaction further scheduling of transaction data
is on hold, that might be the cause.

Lars

-- 
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die Wahrheit ist, dass sie noch nicht einmal oberflächlich sind.

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   [ Die Fröhliche Wissenschaft Buch 3, 126 ]