Solaris zone memory on the fly

Zone Memory

Setting memory parameter for running zones

You can change memory parameter for running zones. But remember to make it persistent by changing zone config file, too. So I do it always in advance.

Change setting in the config file

# zonecfg -z myzone
zonecfg:myzone> select capped-memory
zonecfg:myzone:capped-memory> info
capped-memory:
        [swap: 10G]
zonecfg:myzone:capped-memory> set swap=16G
zonecfg:myzone:capped-memory> set physical=16G
zonecfg:myzone:capped-memory> set locked=10G
zonecfg:myzone:capped-memory> info
        physical: 16G
        [swap: 16G]
        [locked: 10G]
zonecfg:myzone:capped-memory> end
zonecfg:myzone> verify
zonecfg:myzone> commit
zonecfg:myzone> exit
#

Change settings for the running zone

First take a look

# zlogin myzone prtconf | grep Memory
prtconf: devinfo facility not available
Memory size: 65536 Megabytes

# prctl -t privileged -i zone myzone
zone: 1: myzone
NAME    PRIVILEGE       VALUE    FLAG   ACTION                       RECIPIENT
zone.max-swap
        privileged     10.0GB       -   deny                                 -
zone.cpu-shares
        privileged          1       -   none                                 -

Set the new values

# rcapadm -z myzone -m 16G
# prctl -n zone.max-swap -v 16g -t privileged -r -e deny -i zone myzone
# prctl -n zone.max-locked-memory -v 16g -t privileged -r -e deny -i zone myzone

Prove values

# zlogin myzone prtconf | grep Memory
prtconf: devinfo facility not available
Memory size: 16384 Megabytes

# prctl -t privileged -i zone myzone
zone: 1: myzone
NAME    PRIVILEGE       VALUE    FLAG   ACTION                       RECIPIENT
zone.max-swap
        privileged     16.0GB       -   deny                                 -
zone.cpu-shares
        privileged          1       -   none                                 -

Done.