Adding Memory to a Solaris Zone on the fly

Well good morning and god bless everyone. This is a quick tutorial on how to Add memory to a Solaris Zone on the fly while its running without a reboot, Solaris Zones is some pretty cool technology well enough chatter from me lets get to it.

prctl, rcapadm can modify a running zone. and the zonecfg defines the resource parameters of the zone when it boots.

So in order to make changes dynamically you will have to do the following:
1. Update the zonecfg.
2. Use the prctl, rcapadm commands to modify the zone while it is online. make sure that everything matches the changes you've made to the zonecfg.

Below are the detail steps to add the capped-memory  to the running zone container.

zonecfg -z blah 
zonecfg:blah; select capped-memory
zonecfg:blah:capped-memory> info 
capped-memory:
physical: 1G
[swap: 2G]
[locked: 512M]
zonecfg:blah:capped-memory> set physical=2g
zonecfg:blah:capped-memory> set swap=3g
zonecfg:blah:capped-memory> info 
capped-memory:
physical: 2G
[swap: 3G]
[locked: 512M]
zonecfg:blah:capped-memory> end
zonecfg:blah> exit


Modify the zones running settings:

blah:/
# rcapadm -z blah -m 2048m

blah:/
# sleep 60

blah:/
# rcapstat -z 1 1 

blah:/
prctl -n zone.max-swap -v 3g -t privileged -r -e deny -i zone blah

Verify that the settings have taken effect

zlogin -C blah 

Then run the top command 

#top -c 

Well its about that time, i hope you enjoyed and really got something out of this tutorial. 
 until next time i wish you nothing but happiness and success.