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Re: multiple access bog down on HP-UX 11i

From: Ryan Hunt <rhunt_at_hp.com>
Date: 2003-11-13 02:00:53 CET

So I have some more information on this problem.

I have say 9 checkouts occurring simultaneously. Load is up to around
10. Each process has about 9-10% CPU, and has a state of run. Files
are being written to the clients at about 30MB per min.

As soon as I start an import for a 10th simultaneous svnserve process
all process assume the sleep state and drop down to 1% CPU or less.
Load drops to 1-2.

The import is killed mid stream. All remaining svnserve processes
performing the checkouts remain in sleep state. While in sleep state
files are written to the clients at a rate that nonexistent.

Any ideas on why this might occur and how to prevent it?

-Ryan

On Tuesday, November 11, 2003, at 05:35 PM, Ryan Hunt wrote:

> I am running my repository on an HP-UX 11i system using the svn+ssh
> access method.
>
> When 2 separate users start 4 simultaneous checkouts each for a total
> of 8 checkouts, and a 3rd user initiates an import, the import grinds
> to a halt, and the checkouts proceed at a rate of .5MB per hour.
>
> Each transaction ranges in total size from 200MB to 2.5GB with the
> largest file size being 600MB.
>
> After all the transactions are canceled and another transaction is
> initiated the same slow pace is achieved.
>
> To revive the speed a reboot is required.
>
> Load never goes above 1.5, and no resources seem over taxed: disk I/O,
> memory, CPU all seem fine.
>
> Does anyone have any ideas or suggestions to allow multiple
> simultaneous large transactions??
>
> Ryan
>
>
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Received on Thu Nov 13 01:58:54 2003

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