--On Wednesday, April 22, 2009 10:52 AM +0200 "SAGNIMORTE Thomas (CAMPUS)" thomas.sagnimorte@oxylane-group.com wrote:
Hi,
I am using hdb backend.
Here is the gdb backtrace Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 1140881728 (LWP 31250)] 0x0000003c024082e9 in pthread_mutex_lock () from /lib64/libpthread.so.0
Hi Thomas,
This is not a backtrace, this just tells us where the segfault is being recorded from in gdb. What we need is the output of "thr apply all bt" inside gdb after this happens.
Thanks!
I set entry cache to 100000, idlcache to 10000 and dncache to 10000.
Seems reasonable.
--Quanah
-----Original Message----- From: Quanah Gibson-Mount [mailto:quanah@zimbra.com] Sent: Tuesday, April 21, 2009 6:58 PM To: SAGNIMORTE Thomas (CAMPUS); openldap-technical@openldap.org Subject: Re: Segfault during Auth Benchmark request
--On Tuesday, April 21, 2009 6:24 PM +0200 "SAGNIMORTE Thomas (CAMPUS)" thomas.sagnimorte@oxylane-group.com wrote:
Hi,
I am working on building and benchmarking OpenLDAP v2.4.16 for a large
entries directory (actual test: 2 000 000 but final objective 10 000 000 users).
I use SLAMD to test authentication in order to evaluate what is the maximum number of authentication I can do on my server. So I try to do
5 authentications per 5ms during 5min.
My OpenLDAP 2.4.16 is install on the X86 two core 2.8Ghz server with 4Go of memory.
I set 3Go in cache of DB_Config and I have look a lot on how configure
properly slapd.
Is it normal because I have reach system limits or can I change some parameter to optimize slapd performance?
Do some people have some figures about slapd performance with large entries directory on standard server?
Where is the gdb backtrace of your segfault?
Which slapd backend are you using? bdb? hdb? something else? Did you properly tune the entry cache, idlcache, and dncache?
--Quanah
--
Quanah Gibson-Mount Principal Software Engineer Zimbra, Inc
Zimbra :: the leader in open source messaging and collaboration
--
Quanah Gibson-Mount Principal Software Engineer Zimbra, Inc -------------------- Zimbra :: the leader in open source messaging and collaboration