I know runstats should be done on SYSIBM.SYS* tables after the database backup from v8 restored in v9.5. do you normally run reorg and runstats on SYSIBM.SYS* tables in production?

if you do should it be done on regular basis (like we do it weekly on application tables) or only when there are any changes done to database/tables/etc? or in what cases should it be done?

our applications are OLTP.

thank you

I think this would depend on the amount of changes done to the catalog tables. You can use reorgchk to help you decide when to reorg them.