Activating or deactivating individual data-gathering modules

Red Hat Enterprise Linux 8.6 z/VM guest

Each data-gathering module has a procfs entry that contains a value 1 if the module is active and 0 if the module is inactive.

About this task

The following procfs entries control the data-gathering modules:
  • /proc/sys/appldata/mem for the memory data-gathering module
  • /proc/sys/appldata/os for the CPU data-gathering module
  • /proc/sys/appldata/net_sum for the net data-gathering module

To check whether a module is active look at the content of the corresponding procfs entry.

Procedure

To activate a data-gathering module write 1 to the corresponding procfs entry. To deactivate a data-gathering module write 0 to the corresponding procfs entry.

Issue a command of this form: 
# echo <flag> > /proc/sys/appldata/<data_type>
where <data_type> is one of mem, os, or net_sum.
Note: An active data-gathering module produces APPLDATA monitor records only if the monitoring support is enabled.

Example

To find out whether memory data-gathering is active, issue: 
# cat /proc/sys/appldata/mem
0
In the example, memory data-gathering is off. To activate memory data-gathering, issue: 
# echo 1 > /proc/sys/appldata/mem
To deactivate the memory data-gathering module, issue: 
# echo 0 > /proc/sys/appldata/mem