Splunk Enterprise Security

oplogSize default value control


I am working with ES Splunk & want to increase the oplogSize from 1Gig to 2Gig..

From KVStore hammer .conf talk:

1GB even works fine for a while with
premium apps — until it doesn't


the default Serverconf file does not seem to have oplogSize setting at all. So how is the 1Gig limit enforced?

oplogSize = <integer>
* The size of the replication operation log, in MB, for environments
  with search head clustering or search head pooling.
  In a standalone environment, 20% of this size is used.
* After the KV Store has created the oplog for the first time, changing this
  setting does NOT affect the size of the oplog. A full backup and restart
  of the KV Store is required.
* Do not change this setting without first consulting with Splunk Support.
* Default: 1000MB (1GB)
0 Karma


The default is active regardless. You should contact support on the correct steps on increasing opLog in a search head cluster. There is a very very specific order you have to do things to not wipe out your kvstore contents and it can be done without a backup and restore. I would recommend 10GB in an active ES environment.

Get Updates on the Splunk Community!

NEW! Log Views in Splunk Observability Dashboards Gives Context From a Single Page

Today, Splunk Observability releases log views, a new feature for users to add their logs data from Splunk Log ...

Last Chance to Submit Your Paper For BSides Splunk - Deadline is August 12th!

Hello everyone! Don't wait to submit - The deadline is August 12th! We have truly missed the community so ...

Ready, Set, SOAR: How Utility Apps Can Up Level Your Playbooks!

 WATCH NOW Powering your capabilities has never been so easy with ready-made Splunk® SOAR Utility Apps. Parse ...