Joyent uses OpenSolaris zones for its accelerators. At some point I needed to verify the physical memory size of one of these zones but was unable to use the webmin tool that Joyent provides. This seemingly simple operation was actually pretty tricky to figure out. Here are the steps I followed:
$ sudo rcapadm -E
state: enabled
memory cap enforcement threshold: 0%
process scan rate (sec): 15
reconfiguration rate (sec): 60
report rate (sec): 5
RSS sampling rate (sec): 5
$ rcapstat -z 1 1
id zone nproc vm rss cap at avgat pg avgpg
46 foo - 0K 0K 2048M 0K 0K 0K 0K
$ sudo rcapadm -D
state: disabled
memory cap enforcement threshold: 0%
process scan rate (sec): 15
reconfiguration rate (sec): 60
report rate (sec): 5
RSS sampling rate (sec): 5
$
rcapadm seems to be a resource management tool. I’m not sure if there’s an impact to leaving it running, but I disabled it just in case.
