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best version for server?

DISCUSSION Larry McVoy 4 participants 4 messages Oct 7, 2002

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We're not sure if it is something we've done or just increased usage, but bkbits.net is getting hammered lately. We see load averages in ~15-20 range pretty regularly. It's got some nasty characteristics from the point of view of server/VM system, tons of data and not really any good working sets. I'm running 2.4.5 on it and that clearly has to go. I am going to try the rmap kernel but I'm open to other suggestions.

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Larry McVoy            	 lm at bitmover.com           http://www.bitmover.com/lm 
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Larry McVoy wrote:

| We're not sure if it is something we've done or just increased usage, but
| bkbits.net is getting hammered lately.  We see load averages in ~15-20
| range pretty regularly.  It's got some nasty characteristics from the
| point of view of server/VM system, tons of data and not really any good
| working sets.  I'm running 2.4.5 on it and that clearly has to go.  I am
| going to try the rmap kernel but I'm open to other suggestions.

I've been running 2.4.17 + O(1) patch for a while on a pretty heavily loaded server (dual CPU) and it works like a charm.

I've put 2.4.19+O(1) on the test machine, it seems to behave OK.

2.4.1[7,9] have Andrea's VM BTW.

I think I still have the sources of the 2.4.17 O(1) patch... somewhere, if you want to try, just email me.

Cheers,

- --

F. CAMI
- ---------------------------------------------------------- ~ "To disable the Internet to save EMI and Disney is the moral equivalent of burning down the library of Alexandria to ensure the livelihood of monastic scribes."
~ - John Ippolito (Guggenheim)
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#2 lore raw
In reply to Larry McVoy
Quoted 5 lines · Larry McVoy

We're not sure if it is something we've done or just increased usage, but bkbits.net is getting hammered lately. We see load averages in ~15-20 range pretty regularly. It's got some nasty characteristics from the point of view of server/VM system, tons of data and not really any good working sets.

There are a few things that could help here:

1) Andrew Morton's io scheduler patch (read-latency2), which is in the -rmap kernel

2) reducing the number of outstanding IO commands in the 3ware controller/driver, so akpm's io scheduler gets a chance to do its work

3) better readahead, if possible...

regards,

Rik

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#3 lore raw
In reply to Larry McVoy
Quoted 6 lines · Larry McVoy

We're not sure if it is something we've done or just increased usage, but bkbits.net is getting hammered lately. We see load averages in ~15-20 range pretty regularly. It's got some nasty characteristics from the point of view of server/VM system, tons of data and not really any good working sets. I'm running 2.4.5 on it and that clearly has to go. I am going to try the rmap kernel but I'm open to other suggestions.

I think your being slashdotted..

Gerhard

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Gerhard Mack

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<>< As a computer I find your faith in technology amusing.