OS killed some of databse demons I have 2 HP servers with CntOS 6 as OS and DB2 10.5 as Database. there 2 servers are HADR. standby server suddenly rebooted and when i checked log it said that OS had killed 4 db2 demons.  


IBM.ConfigRM
ctcasd
RMCD_INFO_1_ST
GS_STOP_ST  


why this happens? why OS killed these demons?
there is no explaination in diag or other log file to be checked.
This might happen due to exhausted virtual memory on your server. OOM killer kills processes to free some memory in this case.

You can try to collect some information next time when it happens again with db2fodc -detect functionality using either predefined script or your own.

See the Threshold collection examples at the db2fodc - DB2 first occurrence data collection command link.