Where/what is all the disk activity?

[lgaetz (Lorne Gaetz)]

Not sure if there is something useful for you here:

Tuning freePBX Kernel Virtual Memory Parameters

We migrated freePBX 2.5.1 to a freePBX 13 HA Cluster. The system only handles voicemail and IVRs for a large Cisco Call Manager installation. It has over 5000 extensions and voicemails and over 300 IVRs. The legacy freePBX 2.51 handles about 200 concurrent calls on a 16 core system with 32G RAM, and has never had audio issues. Each node of the new freePBX 13 HA cluster has 32 cores and 64G RAM. While load testing the system prior to roll out, we found that with a load over 100 calls we were…