[mrtg] Re: Has anyone used a RAMdisk to speed up MRTG?

Ragnar Kjørstad mrtg at ragnark.vestdata.no
Thu Jul 8 19:16:15 MEST 1999

On Thu, Jul 08, 1999 at 10:06:45AM -0500, Jim Johnson wrote:
> From what I've read in this mailing list, MRTG's major bottleneck is disk
> I/O.  What I'm thinking of doing is creating a ramdisk for the MRTG working
> directory so that all log file manipulation would take place in RAM.  I
> would then schedule another cron job to run hourly that would backup the log
> files to the physical hard disk.

I can't see that putting the data on a ramdisk is going to help.

If you have enough RAM to cache all your data anyway, they will stay in
memory and IO shouldn't be a problem. (Linux has write-back cache and
mounts filesystems async by default).

Ragnar Kjørstad
Vest Internett

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