How to turn on multithreading in AIX server ?

Today we will look how yo turn on multithreading on AIX server.

The steps are quite easy to work out and the specialty of AIX server is that everything can be done online.

Enable multithreading in LPAR – say 8 SMT threads

1. Check current stat

#lparstat -i



2. Turn on Multi-threading

# smtctl -m on


3. Change SMT threads to 8. Usually this is set to 4.

# smtctl -t 8


4. Make the changes persistent by having them saved in System PROM.

# bosboot -a
## Check the changed settings in smtctl
# smtctl

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