Hello ralphch ,

What's your system ?
If Unix, run vmstat and iostat and see what's going on during heavy load (5 seconds sampling time is a good start, monitor a long run of your system with both busy and idle state if you can).

I'm guessing that since you read files, disk access may be limiting (then stripe or raid or scsi or fddi or ramdisk or ... ) . But since it's always the same files it may very well be that they are already cached into ram after the first access so disk performance could be dismissed from being a problem. sar will give you some cache hit stats.

It's important to monitor this data because an hardware upgrade may very well be completly useless !

In reply to Re: Speeding up large file processing by ZlR
in thread Speeding up large file processing by ralphch

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