W dniu 03.02.2011 17:42, Gerrard Geldenhuis pisze: > Hi Daniel, > I am getting 1200 conn/sec on very old hardware so maybe something else is wrong. > > The very first thing to do is to run logconv.pl script which will come installed with 389. It has a flag for recommendations which I suggest you enable or just enable every flag. > > Sample command: > logconv.pl /var/log/dirsrv/slapd-<hostname>/access -efcibaltnxrgjyp > > I don't yet understand all the errors that this tool reports but it is a good start. > > One other thing, I disabled log buffering at one stage to debug something. I forgot about this and then ended up debugging why the server was so slow until I realized that is what I had done. So make sure you have logbuffering enabled. > > dn: cn=config > changetype: modify > replace: nsslapd-accesslog-logbuffering > nsslapd-accesslog-logbuffering: on I've buffered logs, there's no problem with IO (below). Are you sure that you have 1200 tcp connections/s to LDAP server? If you've not mistaken connections/s with binds/s, then please tell me what have you done to get this result? # vmstat 5 procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu------ r b swpd free buff cache si so bi bo in cs us sy id wa st ..... 2 0 105388 15396 28320 6051316 0 0 10 573 5685 7408 24 4 72 0 0 2 0 105388 16012 28312 6050872 0 0 1 718 5891 7812 25 4 72 0 0 1 0 105388 16276 28328 6050336 0 0 8 662 5773 7518 24 4 72 0 0 4 0 105388 16464 28308 6050100 0 0 2 546 5577 7392 24 4 72 0 0 4 0 105388 15424 28324 6051228 0 0 6 665 5724 7480 23 4 73 0 0 > Regards > >> -----Original Message----- >> From: 389-users-bounces at lists.fedoraproject.org [mailto:389-users- >> bounces at lists.fedoraproject.org] On Behalf Of Daniel Fenert >> Sent: 03 February 2011 16:30 >> To: General discussion list for the 389 Directory server project. >> Subject: Performance tuning - where to begin? >> >> Hi, >> >> I have performance problem on 389-ds server and don't really know where >> to start fine tuning. >> >> My current setup is master (2xQuadCore, 8GB RAM), few read-only slaves. >> It works (more or less) without problems, but I would like to migrate to >> multi master (2 master servers). >> >> To check if one master will handle the whole load, I've tried switching >> clients from slaves to master one by one. >> >> After switching clients from third slave, I've encountered weird problem >> - master was about 50% busy (looking at the cpu, no IO waits), but there was >> problem with new connections. >> Looking at the network level - there was SYN from client, but no ACK until >> one or two retransmissions of SYN. >> >> I've tried increasing thread number (from 30 to 60), but problem still exists. >> >> The problem is near 400-500 connections/second. My whole load is >> ~750conn/sec. Looking at the CPU usage, this server should handle the load. >> It works stable with load ~300conn/sec. >> >> There are plenty of configuration options, where should I look first? >> >> -- >> Daniel Fenert >> -- >> 389 users mailing list >> 389-users at lists.fedoraproject.org >> https://admin.fedoraproject.org/mailman/listinfo/389-users > ________________________________________________________________________ > In order to protect our email recipients, Betfair Group use SkyScan from > MessageLabs to scan all Incoming and Outgoing mail for viruses. > > ________________________________________________________________________ > -- > 389 users mailing list > 389-users at lists.fedoraproject.org > https://admin.fedoraproject.org/mailman/listinfo/389-users
