Share this page

# PPM cache overview

This topic introduces PPM cache.

In this topic:

## About PPM cache

PPM administrators can tune PPM caches such as table component, request type search fields, and validation values, from the <PPM_HOME>/conf/cache.conf directory. You can view its cache statistics in the CacheManager Statistics report in Server Tools of PPM Workbench.

There is another type of caches in PPM (the Hibernate second level cache). However, this is an internal cache that cannot be configured or tuned. Its configuration is defined in the <SERVER_HOME>\deploy\itg.war\WEB-INF\conf\ehcache.xml directory and it should not be tampered with.

## Cache statistics report

This section introduces the CacheManager Statistics report.

The CacheManager Statistics report includes the following information for each cache:

- Hits, misses, and hit rate (the higher the hit rate, the better)

- The number of cache flushes

  Cache flushes are broken down by the categories "old", "idle", "soft reference reclaimed", and "max cache size reached"

- The average load time to load an object from database when it is not in the cache

- The number of staleness checks performed

- The maximum cacheable objects (cache size), cached object count, and maximum idle time

- Whether the cache is distributed or not

  If it is distributed, removing an object from the cache in any node of the PPM cluster will send a message to all the other cluster nodes to remove that object from their caches.

## See also

- Configure and tune caches

https://admhelp.microfocus.com PPM 8942
Tips to improve your search results... OpenText™ Project and Portfolio Management Help Center PPM Help 26.2-26.3 All View Local Help Center View Online Help Center Version: