I have been running into some huge memory spikes, and was wondering if its normal, or if anyone has seen it before.

Archtecture: OpenLDAP 2.4.21 Running on RH4 Ulimit open files upped to 4096

Masters: auth01.cmc, auth01.inflow Running n-way multimaster

Slaves: rsa01.inflow, rsa02.inflow, rsa03.cmc, rsa04.cmc Syncrepl running off both masters refreshAndPersist with retry=²60 +²

Here is a graph of the spikes we are seeing on auth01.cmc and auth01.inflow

It also looks like the slave servers are only connecting to auth01; when looking at netstat on the auth boxes, I see:

From auth01.phil:

tcp 0 0 auth01. inflow:ldap rsa04.cmc:46851 ESTABLISHED tcp 0 0 auth01.inflow:ldap rsa01.inflow:61648 ESTABLISHED tcp 0 0 auth01.inflow:ldap rsa01.inflow:61686 ESTABLISHED tcp 0 0 auth01.inflow:ldap rsa01.inflow:61683 ESTABLISHED tcp 0 0 auth01.inflow:48882 rsa02.inflow.:ldap ESTABLISHED tcp 0 109500 auth01.inflow:ldap rsa03.cmc:45798 ESTABLISHED tcp 0 0 auth01.inflow:ldap rsa02.inflow.:8773 ESTABLISHED

From auth01.cmc:

tcp 0 0 auth01.cmc:ldap rsa02.inflow:8885 ESTABLISHED tcp 1 0 auth01.cmc:24310 rsa03.cmc:ldap CLOSE_WAIT tcp 0 0 auth01.cmc:ldap rsa01.inflow:61657 ESTABLISHED

With refreshAndPersist, shouldn¹t each slave be connected to each host configured in syncRepl, and keep that connection?

This is a pretty big issue ­ today we had a master crash; got:

Mar 18 14:39:43 auth01 slapd[17498]: bdb(dc=comcast,dc=com): malloc: 16422: Cannot allocate memory Mar 18 14:39:43 auth01 slapd[17498]: bdb(dc=comcast,dc=com): malloc: 32000: Cannot allocate memory Mar 18 14:39:43 auth01 slapd[17498]: bdb(dc=comcast,dc=com): PANIC: Cannot allocate memory Mar 18 14:39:43 auth01 slapd[17498]: bdb(dc=comcast,dc=com): PANIC: fatal region error detected; run recovery Mar 18 14:39:43 auth01 slapd[17498]: slap_graduate_commit_csn: removing 0x9b5d3ec8 20100318143943.437380Z#000000#001#000000 Mar 18 14:39:43 auth01 slapd[17498]: bdb(dc=comcast,dc=com): uniqueMember.bdb: write failed for page 35805 Mar 18 14:39:43 auth01 slapd[17498]: bdb(dc=comcast,dc=com): uniqueMember.bdb: unable to flush page: 35805

These boxes have 8gig ram; I am trying to figure out if this is normal and I just need to up the ram.

Thanks for any help in advance.