Performance analysis and tuning

This chapter describes possibilities for performance analysis and performance tuning

oprofile

a low-overhead system-wide profiler

Locking impacts and Loadbalancing

When using a gfs-cluster with multiple nodes being used as active/active cluster with some kind of loadbalancer in front or integrated these hints might help.

Tracedump and memorydump of a clusternode

I all cases when a cluster makes problems and should be analyzed further it is very important to get a kernelstacktrace and memorydump as described below

Disable quota if you don't need quota

When mounting GFS without quota it could improve performance