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Re: Subversion trunk (r1078338) HTTP(/WC?) performance problems?

From: Philip Martin <philip.martin_at_wandisco.com>
Date: Thu, 10 Mar 2011 15:23:56 +0000

Hyrum K Wright <hyrum_at_hyrumwright.org> writes:

> Having only tangentially followed this thread, I've got a couple of questions:
> * Do the current subversion+serf fixes solve the the large checkout
> time problem people have been seeing on trunk?

I have a mirror of the Subversion repo (mod_dav_svn 1.6). Checking out
trunk over a LAN gives onto a local disk:

real 0m8.661s 0m8.509s
user 0m3.710s 0m3.790s
sys 0m1.920s 0m2.020s

real 0m8.814s 0m8.779s
user 0m4.070s 0m4.280s
sys 0m2.710s 0m2.510s

real 0m8.186s 0m7.973s
user 0m3.850s 0m3.650s
sys 0m3.310s 0m3.410s

So 1.7 uses more CPU but is about the same elapsed time, if anything
1.7/serf is now faster than 1.6.

Network disks are still a concern. Checkout onto NFS (mounted sync):

real 1m58.342s
user 0m5.990s
sys 0m10.830s

real 7m13.181s
user 0m8.450s
sys 0m35.300s

Checkout onto NFS (mounted async):

real 1m26.692s
user 0m6.150s
sys 0m10.690s

real 6m20.883s
user 0m11.040s
sys 0m37.460s

We using a lot more CPU and elapsed time is hugely increased.

Received on 2011-03-10 16:24:27 CET

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