Dynamic page pool monitoring

The size and status of the dynamic page pool can be checked by issuing the mmdiag --pagepool command.

The command output provides the following details:
  • The minimum-allowed size of the page pool
  • The smallest size of the page pool while the daemon was running: “low watermark”
  • The current size of the page pool
  • The largest size of the page pool while the daemon was running: “high watermark”
  • The maximum allowed size of the page pool
  • The detected memory on the node
The IBM Storage Scale performance monitoring also includes the following metric for the current size of the page pool. For more information, see GPFS metrics.
  • pfs_bufm_tot_poolSizeK: Total size of the page pool.‌
Note: Due to calculations and rounding operations, the pagepool size can be initially slightly less than the minimum size.