2117327 - Error 691, "Encountered invalid logical page '0' while accessing database ... object 'sysgams' ..." and stack trace on large databases - SAP ASE

• Error log reports ASE error 691:
  
  Encountered invalid logical page '0' while accessing database 'tempdb' (2), object 'sysgams' (14), index 'sysgams' (0), partition 'sysgams_14' (14). This is an internal system error. Please contact SAP Technical Support.
  
  
• Alternatively, errors 690 or 692 may be reported instead:
  
  
           690       20      2
           Pageno in lk_pglocked (%u) different from lockobj (%u).     
  
            
           692       20      2
           Uninitialized logical page '%u' was read while accessing %S_PTNINFO. Please contact Sybase Technical Support.
  
  
• A stack trace including the modules am_op() and pg_ptndeall() may also be reported
• Data modification language (DML) -- ie: INSERT, UPDATE, DELETE -- was being executed by the process involved
• The database involved is over 64GB on a 2K-page server, 128GB on a 4K-page server
• ALTER DATABASE cannot expand the database device with no error message, when the database size exceeds 64 GB in 2 k page size

• SAP Adaptive Server Enterprise (ASE) 15.7
• SAP Adaptive Server Enterprise (ASE) 16.0

KBA , global allocation map , vldb , gam page , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Bug Filed