The following error message occurs in the logfile
Error: “11/24/2008 10:51:05 Event: Error updating a Domino Domain Monitoring event document (NoteID 0xF2AA): Event correlation cache is full. You can increase its size via the NOTES.INI setting EVENT_CORRELATION_POOL_SIZE”
Even with the maximum configured pool size, the above error can still be generated. A frequent root cause for this error is having verbose logging enabled. DDM cannot keep up with events being logged at a high rate. There are many configuration settings that will enable verbose logging. For example, values for LOG_MAILROUTING > 20 can cause the router to log scores of messages every second. It is strongly recommended that all variations of verbose logging be used only while debugging a specific situation. After debugging is complete, disable the verbose logging options.
Domino creates cached documents that are 2MB in size and the server allows a maximum of 200 cached documents by default. Since 2MB x 200 is greater than the maximum allowable pool size, the error can occur unless additional parameters are enacted to control the document size and/or the maximum number of cached documents. The following notes.ini parameters are available for these purposes.
DDM_MAX_NOTE_CACHE (number of documents in the cache)
DDM_MAX_DOCSIZE_MB (size in megabytes of documents in the cache)
To ensure that the Event Correlation cache will not be exhausted when configured to the maximum 100MB size, use these parameters so that the following formula is true:
DDM_MAX_NOTE_CACHE x DDM_MAX_DOCSIZE_MB <= 100
Important: After you have set the parameters, you have to restart the event task!