3732773 - SIGSEGV occur in pchk_hash_search() when multiple DBCC CHECKSTORAGE commands are executed concurrently - SAP ASE

• Error log reports: "Current process infected with signal 11 (SIGSEGV)" in module 'pchk_hash_search' during concurrent DBCC CHECKSTORAGE.
• sp_monitorconfig "number of worker processes"  shows incorrect Num_active value.
• Issue observed after upgrade to ASE 16.1.
• A typical log sequence includes:

  Current process infected with signal 11 (SIGSEGV) at 0x0x0000000001556116 (pchk_hash_search+0x96)

  with stack functions
  pchk_hash_searc
  pchk_page_row
  pchk_ndx_page
  pchk_page
  pchk_all_pages
  pchk_scan_work
  pchk_scan_main

  Error: 9970, Severity: 20, State: 1
  DBCC cannot update the finish time in dbcc_operation_log table for this operation(opid = '13') of database 'data_govcorp'. This can be patched by executing sp_dbcc_patch_finishtime.

  Address 0x0x000000000107ac08 (prPCHK_INDEX_CHECK_IND+0x93)
  Current process (0x77d03bf) infected with signal 11 (SIGSEGV)
  SQL Text: insert dbcc_operation_log(dbid, opid, optype, suid, start, seq, id) values(16, 13, 2, 1, getdate(), null, null)
  curcmd = 317 (DBCC_CMD) program = isql

  with stack functions
  prPCHK_INDEX_CHECK_IND
  pchk_get_all_rids
  checkstorage

• SAP Adaptive Server Enterprise(ASE) 16.1

ase 16.1, dbcc checkstorage, pchk_hash_search, sigsegv, infected with 11, concurrent execution, parallelism, monitorconfig , KBA , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Problem