Good afternoon, there is not one switch to turn off the audit all together through a cluster property. It can be accomplished by changing the Manage Log/Audit Sinks -> Click Manage Audit Sink button -> uncheck "Save audit records to Gateway database" -> Check Output audit records via audit sink policy-> Click the Configure button -> Create a custom audit sink. In the audit sink policy remove everything in the policy and add back in a Continue processing assertion. This procedure will stop writing audits out to the database. If you want to remove the audit from being written to logs you will need to remove the Audit category from each of the log sinks as well.
One other note that is you want to only exclude certain audits from being written to the log or db then you can add in the cluster wide property audit.auditDetailExcludeList and add in the audit code with a space to delimit it.
Sincerely,
Stephen Hughes
Director, CA Support