The JCmon is a monitoring program, mainly
used to
·
Display
list of the processes
·
Enable,
disable, restart and debugging the specific process
·
Shutdown
a specific J2EE instance
1. To start the JCmon,
login with <SID>adm and execute the below command:
·
jcmon
pf=/usr/sap/<SID>/sys/profile/<SAPSID><INSTANCE_ID><HOST>
2. It will display the
below 4 choices on the JControl Main Menu
===================================================
JControl Monitor Program - Main Menu
===================================================
0 : exit
------------------------------------------------------------
10 : Cluster Administration Menu
------------------------------------------------------------
20 : Local Administration Menu
------------------------------------------------------------
30 : Shared Memory Menu (Solid Rock, experimental)
------------------------------------------------------------
command
=> 20
From Basis Administrative perspective, most
important command is 20, which displays
the status of the below:
1. dispatcher
2. Server0
3. SDM
Idx
|
Name
|
PID
|
State
|
Error
|
Restart
|
0
|
dispatcher
|
8028
|
Running
|
0
|
yes
|
1
|
server0
|
7508
|
Running
|
0
|
yes
|
2
|
SDM
|
15804
|
Running
|
0
|
yes
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
JCMon Monitoring tool can be used to
administrate the processes and JCmon main menu provides the following functions.
0:
Exit
Returns
back to the main menu
1:
Refresh list
Refreshes
the process list and the menu
2:
Shutdown instance
Invokes
the shutdown of the specified J2EE instance
3:
Enable process
Enables
and starts a process, which is switched off. (Restart == no)
4:
Disable Process
Stops
a running process and switches off the restart flag
5:
Restart Process
Restarts
the specified process
6:
Enable bootstrapping on restart
7:
Disable bootstrapping on restart
8:
Enable Debugging
Checks
if the specified process is running in debug mode. If not and the process is
configured for debugging, JControl will restart the process in debug mode
9:
Disable Debugging
If
the process is running in debug mode, JControl will restart the process and
switch off the debug mode
10:
Dump stack trace
The
specified process gets an event to invoke the dump of the stack trace of the
Java VM. The stack trace is stored in the stderr<n> output file in the work directory
11:
Process list
Displays
the status and additional information about all the processes
12:
Port list
Displays
a list with detailed information about the ports used by the J2EE Engine
13:
Activate debug session
Activates
the debug session for the specified process. To activate a debug session:
·
The
process must be running in debug mode.
·
The
process must be “Load Balance Restricted”
14:
Deactivate debug session
Deactivates
the debug session. The process will be restarted or stopped – this depends on
the process configuration
15:
Increment trace level
This
increments the trace level for the developer trace file of the specified
process (dev_<component name>)
16:
Decrement trace level
This
decrements the trace level for the developer trace file of the specified
process (dev_<component name>)
17:
Enable process restart
18:
Disable process restart
- - - - - - - -- - - -- - - -Continue-
- - -- - - -- - - -- - - -
40
: Enable bootstrapping for all processes with specified process type
41 : Enable bootstrapping for all processes excluding specified process type
- - - - - - - -- - - -- - - -Continue-
- - -- - - -- - - -- - - -
98:
Synchronize instance properties
99:
Extended process list on/off
