Hi,

after a bit of a calamity involving an unexpected upgrade to rrdtool 1.2
I decided to make the move to 0.8.3, after the upgrade the load average
on the server went from around 2 to around 20.

I spent the best part of 2 days trying to fix my installation of JFF, 
and now have a monitoring solution that works again.  The problem was 
related to rrdtool thrashing the disk to within an inch of it's life, a 
vmstat 1 10 was showing a bi value of consistently 20,000.  I fixed the 
problem by tweaking the readahead value on the disk with a "blockdev 
--setra 64 /dev/sdb1"

I'm not sure if anyone else has seen similar problems, or whether this 
solution would help them, but I thought I'd best throw this out there in 
case anyone else is struggling.

Cheers

Martin





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