the rompe blog

This PDF (mirror) contains loads of general information about performance tuning for Linux systems. It is neither new nor does it offer secret knowledge, but I have learned some little details by reading through it.

While searching for bottlenecks I found the sysstat package very useful. It logs system performance data from /proc that you can browse later using the accompanying command line tools or a GUI frontend named isag which draws nice graphs with GNUPlot.
Debian Packages:

• sysstat - sar, iostat and mpstat - system performance tools for Linux
• isag - Interactive System Activity Grapher for sysstat

If you want to tune the performance of an OpenLDAP server, these are some links you may like to check:

• Quick guide to LDAP - Performance Tuning
• A paper from the competent guys at metaconsultancy
• Big (500 pages) PDF about configuring and using LDAP, including a section about performance tuning
• OpenLDAP Faq-O-Matic: Performance Tuning
• Short, Redhat centric guide with generic tuning tips