Re: Openldap2.4.16 performance issue

["Dieter Kluenter" <dieter@dkluenter.de>]

"Singh, Devender (GE Capital, consultant)" <Devender.Singh2@ge.com> writes:

> Hi All,
>
> I need help for openldap slapd 200% cpu utilization issue.
>
> I have configured three openldap servers(2 Masters and 1 Slave). I have
>
> configure PEN load balancer for failover setup on 2 master openldap servers.It
>
> means application server first of all hit the loadbalancer port and than PEN LB
>
> will forwad that request to Master 1 or 2 openldap server.
>
> Hardware configuration on all boxes:
>
> OS: RHEL5(x86_64)
>
> RAM: 2GB
>
> Number of CPU: 2(Intel(R) Xeon(R)2.00GHz)
>
> Number of BDB databases: 2
>
> Databse1: 
>
> Number of users : 830000
>
> Number of dns: 830000
>
> Database2:
>
> Number of users: 2000
>
> Number of dns: 800000
>
> My Application1 using Databse1 and Application2 using Databse2.
>
> Application2 just authenticating the users and store last 10 password history
>
> only, It means Application1 is not using openldap too much.
>
> In Application2(90% dependent on openldap) every user have 1000+ sub leafs
>
> entries. when I want to do major changes(number of leafs write) into this, it.s
>
> got hanged and got socket closed error in application logs and CPU utilization
>
> goes 200% and RAM 52%. My DB_CONFIG file is below:

Most likely to many concurrent write operations. You should move the
db logfiles onto a different disk.

-Dieter

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Dieter Klünter | Systemberatung
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