Unable to set kernel parameters using Reource Control

Question

HI,
I'm trying to install DB2 8.2 on solaris 10.the problem i'm encountering in installation is unable to set MSGMAX and MSGMNB kernel parameters. I tried setting the new replacement parameter process.max-msq-qbytes through projects->Resource Control from the management console.but still uinable to set the parameters.
Can anyone help me in setting the above kernel parameters.
Its not possible to set it thru /etc/system.
thanx
guru

Answer 1

I finally had some time to find the actual syntax for tuning process.max-msq-qbytes and process.max-msg-messages. prctl will change those paramaters for an existing process.
As a proof of concept I changed process.max-msg-messages to a 64k. process 2221 is my shell.
prctl -n process.max-msg-messages  -r -v 64k 2221
bash-3.00# prctl 2221
process: 2221: -csh
NAME    PRIVILEGE       VALUE    FLAG   ACTION                       RECIPIENT
process.max-port-events
        privileged      65.5K       -   deny                                 -
        system          2.15G     max   deny                                 -
process.max-msg-messages
        privileged      64.0K       -   deny                                 -
        system          4.29G     max   deny                                 -
process.max-msg-qbytes
        privileged      64.0KB      -   deny                                 -
        system          4.00GB    max   deny                                 -And now to make this persist across reboots...
So long as I'm experimenting, I'll use projadd and add a new project which just includes me and not the rest of the users in the group staff.
bash-3.00# projadd -p 115 -U testuser \
-K "process.max-msg-messages=(priv,64K,deny)" \
-K "process.max-msg-qbytes=(priv,64K,deny)" \
user.me This creates the following /etc/project:
(note the last line is all on one line in the real file minus the \.)
placer% cat /etc/project
system:0::::
user.root:1::::
noproject:2::::
default:3::::
group.staff:10::::
user.me:115::testme::\
process.max-msg-messages=(priv,64000,deny);process.max-msg-qbytes=(priv,65536,deny)After a reboot I checked the values by loging in under my user and running prctl.
placer% prctl $$
process: 419: -csh
NAME    PRIVILEGE       VALUE    FLAG   ACTION                       RECIPIENT
process.max-port-events
        privileged      65.5K       -   deny                                 -
        system          2.15G     max   deny                                 -
process.max-msg-messages
        privileged      64.0K       -   deny                                 -
        system          4.29G     max   deny                                 -
process.max-msg-qbytes
        privileged      64.0KB      -   deny                                 -
        system          4.00GB    max   deny                                 -
process.max-sem-ops
        privileged        512       -   deny                                 -
        system          2.15G     max   deny                                 -
...Solaris 10 has different tunables and default values from 8 and 9. It's default tunables should be good for most applications per a given system's hardware. There are some great blog articles, and discussions on opensolaris.org and blogs.sun.com on tuning that explain the intent of tuning and why we shouldn't have to tune.
Cheers,
~~sa