| From: | Manfred Spraul <manfred(at)colorfullife(dot)com> |
|---|---|
| To: | markw(at)osdl(dot)org |
| Cc: | pgsql-hackers(at)postgresql(dot)org, osdldbt-general(at)lists(dot)sourceforge(dot)net |
| Subject: | Re: OSDL DBT-2 w/ PostgreSQL 7.3.4 and 7.4beta5 |
| Date: | 2003-11-01 10:44:35 |
| Message-ID: | 3FA38E93.3040502@colorfullife.com |
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| Thread: | |
| Lists: | pgsql-hackers |
markw(at)osdl(dot)org wrote:
>Results from 7.4beta5
> http://developer.osdl.org/markw/dbt2-pgsql/188/
> - metric 1446.01
>
>
CPU: P4 / Xeon with 2 hyper-threads, speed 1497.51 MHz (estimated)
Counted GLOBAL_POWER_EVENTS events (time during which processor is not stopped) with a unit mask of 0x01 (count cycles when processor is active) count 100000
samples % app name symbol name
15369575 9.6780 postgres SearchCatCache
13714258 8.6357 vmlinux .text.lock.signal
10611912 6.6822 vmlinux do_sigaction
4400461 2.7709 vmlinux rm_from_queue
18% cpu time in the kernel signal handlers.
What are signals used for by postgres? I've seen the sigalarm to
implement timeouts, what else?
--
Manfred
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