Set Advanced Parameter to Control Resources for Index Update
You can set the advanced configuration parameter,
CSN.Indexing.Level, to control the CPU and memory use of an indexing
job and, thereby, manage the impact that the indexing job has on available
resources. A value of "high" indicates that the server is dedicated
to IBM® Cognos® searching and indexing, whereas a value
of "low" indicates that the server runs indexing jobs in the background.
Note, as a general guideline, the resources that an indexing job uses depends on the number of available CPUs on the server.