Operating system and syntax UNIX / Windows 
-secsize n
Use with Maximum value Minimum value Single-user default Multi-user default
DBS 32768 0 - 512
n
The size, in number of cache entries, of the primary and secondary security caches.

For best performance, you should set Security cache size (-secsize) large enough that all your existing records fit in the primary cache. Pick the value for –secsize based on available shared memory and the size of the _sec-authentication-domain table. Each entry consumes approximately 450 bytes. For example, if –secsize is 512, roughly 512 * 450 = 0.25 Mb is allocated for the primary cache, and also the secondary cache, for a total of 0.5 Mb. If memory is not an issue, pick a value close the number of records in _sec-authentication-domain.

If you set the value between 1 and 12, it is automatically increased to 13.

You can set Security cache size (-secsize) to 0 (zero) if you never intend to enable use of the security cache on your database.

The Security Cache Size (-secsize) parameter may be modified while your database is online using PROUTIL INCREASETO.