PingDirectory

Slowing queries based on sample cache size

Increase the sample cache size and the idle timeout using the dsconfig tool.

About this task

The evicted-count attribute of the sample cache sets the number of entries that have been evicted from the cache caused by a lack of space. The cache might not be large enough for the query load placed on the server.

Steps

  1. To increase the size of the sample cache to the maximum size of 200000, run the following command:

    $ dsconfig set-monitoring-configuration-prop \
  --set sample-cache-max-cached-series:200000

    Some queries are so infrequent that the cached data expires because of age. The default age is 10 minutes, but this can be increased up to one hour.

  2. (Optional) If the expired-count monitor attribute is increasing between queries, consider increasing the idle timeout with the command:

    $ dsconfig set-monitoring-configuration-prop \
  --set sample-cache-idle-series-timeout:20m