A description of the possible cluster states:
ST_INIT: cluster configured and down
ST_JOINING: node joining the cluster
ST_VOTING: Inter-node decision state for an event
ST_RP_RUNNING: cluster running recovery program
ST_BARRIER: clstrmgr waiting at the barrier statement
ST_CBARRIER: clstrmgr is exiting recovery program
ST_UNSTABLE: cluster unstable
NOT_CONFIGURED: HA installed but not configured
RP_FAILED: event script failed
ST_STABLE: cluster services are running with managed resources (stable cluster) or cluster services have been "forced" down with resource groups potentially in the UNMANAGED state (HACMP 5.4 only)
Wednesday, June 4, 2014
Monday, February 3, 2014
I have seen this happening when we run DB2 on AIX. Sometimes a stopped instance won't release the shared memory segment, not even with ipcrm. Here's what can be done under this situation:
1) Use the new -S option on ipcs to obtain the shared memory segment ID.
# ipcs -mS
m 131075 0x00001a4c --rw------- root system
2) Verify that the svmon command is installed on the system. If not,
install from the AIX installation CDs.
$ lslpp -l perfagent.tools
3) Use the svmon command to find all processes attached to the shared
# svmon -S 0x2b85 -l
Vsid Esid Type Description LPage Inuse Pin Pgsp Virtual
2b85 3 work shared memory segment - 656 0 0 656
This shared memory segment has only one process attached.
To remove this shared memory segment, you must first kill the process that is attached to the segment.
# kill 10862
# ipcrm -m 131075
For memory information, we use the command svmon.
svmon shows the total usage of physical and paging memory.
Command to display top ten processes and users
svmon -P -v -t 10 | more
Displaying top CPU_consuming processes:
ps aux | head -1; ps aux | sort -rn +2
Displaying top memory-consuming processes:
ps aux | head -1; ps aux | sort -rn +3 | head
Displaying process in order of priority:
ps -eakl | sort -n +6 | head
Displaying the process in order of time
ps vx | head -1;ps vx | grep -v PID | sort -rn +3
Displaying the process in order of real memory use
ps vx | head -1; ps vx | grep -v PID | sort -rn +6
Displaying the process in order of I/O
ps vx | head -1; ps vx | grep -v PID | sort -rn +4