Platform statistics

In addition to tracking server statistics, Domino® tracks operating-system performance statistics. You can view these statistics from the Domino® Administrator, along with your Domino® statistics, which helps you with Domino® server monitoring and tuning. You can include platform statistics in any statistic monitoring task you perform with the Domino® statistics, including using them in monitoring and statistic profiles, and charting them.

There may be slight overhead incurred while running platform statistics, however the overhead is insignificant. No disk space is consumed by enabling platform statistics, since no log files are created. As with Domino® statistics, disk space is used only if you log platform statistics to the log file or to the Monitoring Results database (STATREP.NSF). The amount of disk space used depends on the frequency of capture.

By default, the Statistic Collector task continuously gathers these statistics:

  • Logical disk -- Statistics for individual disks and total percent use of all disks
  • Paging file -- Statistics that show use of paging files
  • Memory -- Statistics showing memory allocation and use, including available memory
  • Network -- Statistics for individual network adapters and cumulatively for all the network adapters on the system
  • Process -- Statistics that show the percent of CPU use, along with process ID of Domino® tasks, if the task is present. (Information for idle tasks is reported as zero.)
  • System -- Statistics on the information captured -- for example, a summary of system CPU use and queue length.

Platform statistics on partitioned servers

When collecting statistics from a partitioned server, Domino® collects platform statistics that pertain to the system as a whole, not to an individual partition. For example, memory use or CPU use statistics are the same value on a partitioned and non-partitioned server. The only statistics that are specific to a partition are those that reflect tasks, such process statistics, where one partition might run 10 tasks, while another partition runs 15 tasks.

Confirming platform statistics metrics using other performance monitoring tools

Because of the differences in sampling intervals, you cannot use native monitoring tools to confirm platform statistics. There will be discrepancies between platform statistics and those obtained using Perfmon (for Microsoft Windows) or a system command, such as this UNIX command:

iostat /vmstat/ netstat

Platform statistics for Domino® for Linux

Domino® for Linux does not require iostat, vmstat, or netstat to collect statistics.

Note: If Logical Disk statistics do not appear, ensure that the sysstat package is installed on your server.

Platform statistics for Domino® with AIX®

To obtain platform statistics for IBM® AIX®, the perfstat package is required. Ensure that the perfstat package is installed. By default, disk statistics are not automatically collected each time the server is rebooted. To enable continuous collection of disk statistics, enable the system attribute, iostat.

To determine whether iostat is enabled to allow continuous collection of disk statistics, enter the following command:

lsattr -E -l sys0 -a iostat

If a value of false is returned for the system attribute, iostat, continuous collection of disk statistics is disabled.

To enable the continuous collection of disk statistics, enter the following command:

chdev -l sys0 -a iostat=true.