Re: Wait free LW_SHARED acquisition - Mailing list pgsql-hackers

From Peter Geoghegan
Subject Re: Wait free LW_SHARED acquisition
Date
Msg-id CAM3SWZQh8Cpmc36RSwKyhDzw9Hks_vxyWANYwmCE7kq6KQMaDw@mail.gmail.com
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In response to Wait free LW_SHARED acquisition  (Andres Freund <andres@2ndquadrant.com>)
Responses Re: Wait free LW_SHARED acquisition
List pgsql-hackers
On Thu, Sep 26, 2013 at 3:55 PM, Andres Freund <andres@2ndquadrant.com> wrote:
> We have had several customers running postgres on bigger machines report
> problems on busy systems. Most recently one where a fully cached
> workload completely stalled in s_lock()s due to the *shared* lwlock
> acquisition in BufferAlloc() around the buffer partition lock.

That's unfortunate. I saw someone complain about what sounds like
exactly the same issue on Twitter yesterday:

https://twitter.com/Roguelazer/status/382706273927446528

I tried to engage with him, but was unsuccessful.

-- 
Peter Geoghegan



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