I figured out the problem with the cache, so the performance (once a review
request is cached) is now acceptable.
However, I still feel like the first rendering is too slow, and I don't
know if that is just my expectations or if there might be a real
On Thursday, October 9, 2014 3:11:49 PM UTC-4, David Carson wrote:
> The SVN server, when measured independent of ReviewBoard, is fast. I can
> check out our entire tree (10GB, 20K files) in a minute. But, I agree that
> there might be some other delay between the two servers which is causing
> the overall delay.
> I have logging enabled. I even enabled log profiling, thinking this might
> help me find the problem (although it is also probably slowing down my
> system as a whole). What should I be looking for? Something like this?
> None - dcarson - /r/46/diff/1/fragment/1052/ - Generating diff file info for
> diffset id 83, filediff 1052 took 0.017383 seconds
> Also, as far as the cache goes, I do have it configured as follows, but I
> have no statistics:
> SERVER CACHE
> Cache backend:
> Statistics are not available for this backend.
> I thought this was the preferred cache configuration. Do I need something
> On Thursday, October 9, 2014 2:55:13 PM UTC-4, chri...@beanbaginc.com
>> Hi David,
>> Diff rendering itself is fairly speedy, particularly on a machine like
>> you're using. It takes a lot less time than that on some of the ones I've
>> seen with 1/4th of the RAM and a single CPU.
>> I'd investigate the SVN server. If it's taking a progressively longer
>> period of time, perhaps there's something going on there.
>> If you enable logging in Review Board and view the diff, you will see
>> several entries in the logs detailing the amount of time various
>> diff-building operations take. For instance, the amount of time it's taking
>> to fetch files from the SVN repository, the amount of time it's taking to
>> render the diff, etc. Knowing what these numbers look like will tell me a
>> Also, to check, are you using a memcached server, and if so, can you
>> confirm it is being used? (There are statistics shown for it in the
>> administration UI.)
>> Christian Hammond - chri...@beanbaginc.com
>> Review Board - https://www.reviewboard.org
>> Beanbag, Inc. - https://www.beanbaginc.com
>> -----Original Message-----
>> From: David Carson <dcca...@gmail.com>
>> Reply: revie...@googlegroups.com <revie...@googlegroups.com>>
>> Date: October 9, 2014 at 11:50:49 AM
>> To: revie...@googlegroups.com <revie...@googlegroups.com>>
>> Subject: rendering "diff view" very slow
>> > I am setting up 2.0.8 to be deployed very shortly. The only major
>> > is that the switch to the "diff view" for a review request with 10 or
>> > files is very slow. I would anticipate users wanting to switch back and
>> > forth between "review view" and "diff view" so I must figure this out
>> > before deploying.
>> > For a typical review with 20 files, each file being perhaps 2K lines
>> > and a diff that when downloaded is about 200K bytes, this is what I
>> > - click on "View Diff" in upper right corner
>> > - first file or two renders quickly
>> > - 3-10 take a few seconds each
>> > - 11-20 get progressively slower, taking 5 or more seconds
>> > - switching to diff view always takes this long, not just the first
>> > the "diff view" is rendered
>> > This seems excessively slow for the size of the files, the proximity of
>> > RB server to the SVN server (same switch!) and the size of the diff.
>> > large diffs, or for cases when it is necessary to switch back and forth
>> > between the two views, this becomes almost unusable.
>> > Any ideas what I ought to look for?
>> > I'm running:
>> > - ReviewBoard 2.0.8
>> > - CentOS 7.0
>> > - older Dell server
>> > - 16GB RAM
>> > - Intel Xeon 3GHz, 2 CPUs, 4 cores each
>> > Thanks.
>> > --
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