Calculating the Optimal Log Stream Size
Filtering by using the IMS POLICY from the Guardium appliance occurs in the IMS Control region, therefore only DLI calls that are to be audited are written to the log stream(s).
For most users, the size of the log stream that is provided with the LS_SIZE parameter of the AUILSTR2/3 log stream definition member (LS_SIZE(100)) is appropriate to use when auditing accesses to sensitive data or when auditing DLI calls performed by a group, or groups, of users who have access to all databases for diagnostic purposes.
- during product testing, or
- when the number of audited DLI calls exceed twenty-five thousand DLI calls per second, or
- when the audited DLI calls include large concatenated key or large segment fields, which can occur when the IMS POLICY includes the +DATA keyword in the TARGET/DB INCLUDE filter statement