 | | | free command | free command 2006-01-18 - By Jussi Silvennoinen
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> We've been using "free" command to collect memory info thorugh scripts.
> Recently some of our
> machines having RHEL Update 2 were upgraded to RHEL Update 6. After the
> upgrade,
> the memory info returned by the "free" command is lower than what it used to
> report
> in RHEL U2. The difference is in the order of 100 MB.
>
> For eg. On one of our machine which has 16GB, the "free -m" command used to
> report 15893 MB of RAM
> when the machine used to have RHEL Update2. Now when the machine has been
> upgraded
> to RHEL Update6, the "free -m" command reports the memory as 15709 MB.
>
> This difference in memory does not do much harm except that it defeats the
> purpose of some scripts used in monitoring.
Naturally you wouldn't use hardcoded values in monitoring scripts?
Instead pick the values on the fly and determine appropriate action.
I suspect it's one of the gazillion kernel changes between U2 and U6 which
is responsible for this. Chances of reverting it are practically nil.
--
Jussi
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