Size of DBC

[Jeff_Traigle]

Glance shows the amount of RAM used for the buffer cache in the Memory Stats screen. Is there any way to determine this for systems that don't have Glance installed? sar -b only gives buffer activity, not size. Nothing in vmstat seems to show it either.

[Sridhar Bhaskarla · Accepted solution]

Hi,

See if you have /usr/contrib/Q4/bin/kmeminfo. Run it and it should give you buffer cache usage in 'pages'. Multiply with 4 to get the usage in KB.

-Sri

[Sundar_7]

You can query the kernel symbol bufpages using adb

# echo "bufpages/D" | adb -k /stand/vmunix /dev/kmem

the output is in pages.

[Tom Danzig]

Yet one more way:

sysdef | awk '/bufpages/{printf("%.2f MB\n",$2*.004096)}'

[Jeff_Traigle]

Cool. Thanks. No kmeminfo on my systems. What bundle would this be a part of? (Of course, I'm working with 11.00 so maybe that's an 11i tool.)

[Sridhar Bhaskarla]

It's part of Q4. You should have gotten with the fileset OS-Core.Q4. This comes with 11.0 and I believe it was there on 10.20 too.

-Sri

[Jeff_Traigle]

Hmmm. Ok. This load was put together long before I showed up on the scene. Guess it wasn't something they included in the build.

[Jeff_Traigle]

All done