VRM memory high usage

Remind you VRM01 memory was rising to near 80%:

Portal has an alarm VM Memory Usage Exceeds the Threshold, alarm object is VRM01

• Analysed details information from Linux OS memory usage.
• For details refer to http://www.cnblogs.com/panfeng412/p/3467558.html

      Memory Usage Mechanism

Virtual Resources Management (FusionCompute) collected memory information from OS Kernal which included free, buffers and cached memory status, VRM OS selected cached+ and slab information stored in Cached from memory, if slab is in high usage then FusionCompute will reported in high memory usage. 

As shown in the figure:

 The picture shown above is descripting VRM is a component that manage physical resources from host, if high memory alarm occurs it wouldn't affect operation of guest VM on hosts.

Solution 1: The high memory usage alarm of VRM01 could be ignored.

Solution 2: Release the memory space in system

Login VRM server as root user, run the following command:

    Sync

    Echo 3> /proc/sys/vm/drop_caches

     Wait for 10 minutes and logon to FusionManager Portal check if the alarm is cleaned automatically.

Solution 3: Version upgrade will be released in future.