SymptomsParallels Virtuozzo Containers for Windows server with Symantec Endpoint Protection installed periodically freezes.
CausePVA Agent collects resource usage statistics for containers and stores it in binary files under \vz\PVA\Agent\Data\tmp\perfdata.
Symantec Endpoint Protection consumes a lot of CPU power while trying to find virus signatures in these files, which ultimately leads to the freeze.
directory and all subdirectories from Symantec Endpoint Protection scanning.
NOTE: This solution may be also applicable to other antiviral solutions, supported by Parallels Virtuozzo Containers.