| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Xiaoyulei <xiaoyulei(at)huawei(dot)com> |
| Cc: | Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Many processes blocked at ProcArrayLock |
| Date: | 2014-12-03 13:05:42 |
| Message-ID: | 20141203130542.GX1737@alvh.no-ip.org |
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| Lists: | pgsql-hackers |
Xiaoyulei wrote:
> I put all the stack in attachment.
Not sure that this is really all that useful. At least I don't have the
patience to examine all this, and I'm not sure it contains the needed
info in the first place. If you were to ensure your build is using
-fno-omit-frame-pointer in cflags and then used "perf record -a -g"
while the test runs and "perf report -g" once it's finished, you'd get a
useful profile that would show who is acquiring the problematic lock and
why.
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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