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Buffer Utilization

Useful Statistics to Monitor

Statistic

Meaning

Possible action

Buffer utilization ratio

Indicates the ratio of the number of pages requested to the number read; values less than 2 indicate a problem with the buffer size or with the design of the database

  • Increase the number of buffer pages
  • Reassign files to buffers

Forced writes

Indicates the number of times CA IDMS/DB had to write a buffer page to storage in order to read a database page

  • Increase the number of buffer pages
  • Reassign files to buffers
  • Issue COMMITs more frequently in update jobs

Buffer waits

Indicates the number of times the buffer was requested but was not available

  • Increase the number of buffer pages
  • Reassign files to buffers

Where the Statistics are Reported