With Greenplum Building Blocks(GBB), you may notice that the root partition uses more space than would be expected and it grows significantly over time.
Greenplum Building Blocks (GBB)
Performance Co-Pilot (PCP) is used for monitoring, visualizing, storing, and analyzing system-level performance measurements. It allows the monitoring and management of real-time data, and logging and retrieval of historical data.
The historical data is stored in /var/log/pcp. The amount of data stored in the directory can grow quite large.
Check the size of the /var/log/pcp directory: du -skx /var/log/pcp/
PCP is turned on by default when a GBB cluster is installed. It is not required by Greenplum and can be disabled if it is not required.
See RedHat documentation on Configuring performance monitoring with PCP by using RHEL system roles for details on how to disable it or reduce the amount of historical data saved.