Subject: Re: [Firebird-devel] [FB-Tracker] Created:
(CORE-5419) Index garbage collection on varchar
column causes server to hang



12.01.2017 10:24, Alex Peshkoff wrote:
> On 01/11/17 23:35, Vlad Khorsun wrote:
>
>>>> I do it easily. AST thread is blocked at
>>>> Database::Sync::lock on syncMutex.enter() despite of a lot of checkouts in
>>>> worker
>>>> thread.
>>> Hmm... From posix POV that's a bug but certainly windows calls may have
>>> different rules. May be it makes sense to increase thread's priority
>>> when it's going to deliver AST?
>> I did it in AstContextHolder - not helps. I see blocked thread with
>> highest priority...
>> I plan to try to change syncMutex by Event or Mutex (currently it is
>> Critical Section)
>> and see if it helps

Mutex seems to fix the issue

>
> Crazy question: is syncMutex lock counter == 0 after checkout in
> rescheduler?

Yes.

Regards,
Vlad

------------------------------------------------------------------------------
Developer Access Program for Intel Xeon Phi Processors
Access to Intel Xeon Phi processor-based developer platforms.
With one year of Intel Parallel Studio XE.
Training and support from Colfax.
Order your platform today. http://sdm.link/xeonphi
Firebird-Devel mailing list, web interface at
https://lists.sourceforge.net/lists/listinfo/firebird-devel

...



Programming list archiving by: Enterprise Git Hosting