enable housekeepr GC
As per SAP's 'optimizing performance with SAP Sybase ASE' document released in Oct 2013 by Chris Baker enable,
housekeepr GC should be 5 for OLTP and 4 for batches (OLAP i think)
My current environment (ASE 15.7SP122 on AIX 7.1) is combination of OLTP and OLAP and the configured value is "5" .
Let me know if you think it is wrong and should try something else...