---------- Forwarded message ---------- From: "Marco Pizzoli" <[email protected]> Date: 5 Apr 2011 14:29 Subject: Re: Tuning openldap, nss_ldap and pam_ldap To: "c0re" <[email protected]>
Hi, If it was the same problem that I had some time ago, it was due to idle connections that I gold slapd to close after x seconds. Check yours, and eventually set a keep alive parameter on your client, nss_ldap. Regards Marco On 5 Apr 2011 13:44, "c0re" <[email protected]> wrote: > > Hello openldap users! > > I've got Openldap 2.4.23 that used as authentication and authorization server for about 40-50 servers. > OS - FreeBSD 8.1. > > It's not heavy loaded. > > openldap# top -SP > last pid: 45647; load averages: 0.15, 0.15, 0.07 up 81+22:29:21 15:18:57 > 99 processes: 3 running, 80 sleeping, 16 waiting > CPU 0: 0.7% user, 0.0% nice, 0.0% system, 0.0% interrupt, 99.3% idle > CPU 1: 0.4% user, 0.0% nice, 0.7% system, 0.0% interrupt, 98.9% idle > Mem: 79M Active, 1402M Inact, 379M Wired, 84M Cache, 213M Buf, 31M Free > Swap: 4060M Total, 8K Used, 4060M Free > > PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND > 11 root 2 171 ki31 0K 32K CPU0 0 3874.8 200.00% idle > 4773 ldap 18 44 0 398M 53748K ucond 1 41.1H 0.00% slapd > > But on my servers sometimes I see in logs something like > > on FTP-server: > Mar 25 21:55:32 someftp ftpd: nss_ldap: could not search LDAP server - Server is unavailable > > Authentication works fine, no problems. But want to find out what can be wrong. > > To understand this problem I installed ldap-stats utility and made it run: > > /var/log/debug.log - it's half day openldap server usage log. > > openldap# ldap-stats -c 1000 /var/log/debug.log > > > Report Generated on Tue Apr 5 15:16:47 2011 > -------------------------------------------- > Processed "/var/log/debug.log": Apr 5 00:00:00 - Apr 5 15:17:33 > > > Operation totals > ---------------- > Total operations : 913845 > Total connections : 101226 > Total authentication failures : 2 > Total binds : 99700 > Total unbinds : 99181 > Total searches : 714964 > Total compares : 7 > Total modifications : 0 > Total modrdns : 0 > Total additions : 0 > Total deletions : 0 > Unindexed attribute requests : 0 > Operations per connection : 9.03 > > > # Uses Filter > ---------- ----------------------------------------------------------- > 615504 (&(objectClass=posixAccount)(uid=mailer-daemon)) > 90699 (&(objectClass=posixGroup)) > 6833 (&(objectClass=posixAccount)(uid=root)) > 2236 (&(objectClass=posixAccount)(uid=hiddenuser1)) > 669 (&(objectClass=posixGroup)(memberUid=root)) > 318 (&(objectClass=posixAccount)(uid=testacc)) > 87 (&(objectClass=posixGroup)(memberUid=postfix)) > 87 (&(objectClass=posixAccount)(uid=postfix)) > 81 (objectClass=posixAccount) > 68 (&(objectClass=posixAccount)(uid=debian-exim)) > 68 (&(objectClass=posixGroup)(memberUid=Debian-exim)) > 39 (&(objectClass=posixAccount)(uid=normaluser)) > 34 (&(objectClass=posixAccount)(uidNumber=7333)) > 30 (&(objectClass=posixGroup)(memberUid=hiddenuser1)) > 29 (&(objectClass=posixGroup)(memberUid=chelovek)) > 29 (&(objectClass=posixAccount)(uid=chelovek)) > 27 (&(objectClass=posixAccount)(uid=user0)) > 23 (&(objectClass=posixAccount)(uid=nobody)) > 21 (&(objectClass=posixAccount)(uid=user1)) > 18 (&(objectClass=posixAccount)(uid=user2)) > 16 (&(objectClass=posixAccount)(uid=user3)) > 15 (&(objectClass=posixAccount)(uid=user4)) > 12 (&(objectClass=posixAccount)(uid=user5)) > 11 (&(objectClass=posixAccount)(uidNumber=7330)) > 10 (&(objectClass=posixAccount)(uid=user15)) > 9 (&(objectClass=posixAccount)(uid=user16)) > 8 (&(objectClass=posixAccount)(uidNumber=7333)) > 6 (&(objectClass=posixAccount)(uid=user6)) > 5 (&(objectClass=posixAccount)(uid=user7)) > 5 (cn=defaults) > 4 (&(objectClass=posixAccount)(uidNumber=7228)) > 4 (&(objectClass=shadowAccount)(uid=user1)) > 4 (&(objectClass=posixAccount)(uid=user9)) > 4 (&(objectClass=posixAccount)(uid=user10)) > 4 (&(objectClass=posixAccount)(uid=user11)) > 3 (&(objectClass=posixAccount)(uid=user12)) > 3 (&(objectClass=posixAccount)(uid=user13)) > 3 (&(objectClass=posixAccount)(uid=user14)) > ............... > and MANY others that has 1 use in this stats. > I think this many queries from mail relay server. > * user1 and etc - just hidden real users. > > What can I do to tune nss? Can you point me in a right direction? Do not know what to look at. > If you need any additional information, logs and etc - I'll provide it. > > Thanks in advance! >
