Last modified: 2011-06-04 07:17:01 UTC

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Bug 29034 - Slowness in accessing English Wikipedia
Slowness in accessing English Wikipedia
Status: RESOLVED FIXED
Product: Wikimedia
Classification: Unclassified
General/Unknown (Other open bugs)
unspecified
All All
: High normal (vote)
: ---
Assigned To: Nobody - You can work on this!
:
Depends on:
Blocks:
  Show dependency treegraph
 
Reported: 2011-05-18 08:39 UTC by Derk-Jan Hartman
Modified: 2011-06-04 07:17 UTC (History)
8 users (show)

See Also:
Web browser: ---
Mobile Platform: ---
Assignee Huggle Beta Tester: ---


Attachments
Traceroute outputs (3.44 KB, text/plain)
2011-05-18 13:11 UTC, Simon Walker
Details

Comment 1 Simon Walker 2011-05-18 13:11:01 UTC
Created attachment 8553 [details]
Traceroute outputs

It's not as bad today as it was last night, but I'm still getting 30s page load times on pages a week or two ago were loading in 2-3s.

Here's a couple of tracert outputs for you, first for en.wikipedia.org, then bits.wikimedia.org
Comment 2 SlimVirgin 2011-05-18 18:52:58 UTC
It took me 15 minutes to make one edit today. First, I couldn't get the page to open, then preview wouldn't work, then when I tried to save I got numerous error messages.

This started for me on May 16 when I couldn't get into Wikipedia at all for about an hour, then some pages opened, but my watchlist wouldn't. Then when it did open, the page loaded with bits at the top missing.

Early today was slightly faster, then a few hours ago it went back to being very slow again.
Comment 3 Krinkle 2011-05-18 18:56:48 UTC
This could have a million and one different causes.

* Servers could've had a cache problem
* Could be related to geolocation and nearest datacenter
* Problems at your provider
* Anything on your computer
* Anything in between.

Marking INVALID.

See also "[Wikitech-l] Large number of users unable to access WMF wikis" from earlier this month.[1]


--
Krinkle

[1] http://lists.wikimedia.org/pipermail/wikitech-l/2011-May/
Comment 4 Derk-Jan Hartman 2011-05-18 20:01:22 UTC
The issue is real, and affecting many people.

Ignoring it is not nice towards the many users who are experiencing it.
Comment 5 Atama 2011-05-18 22:13:13 UTC
This issue is affecting people in all parts of the US, in the UK, Australia, and Hong Kong, and those are only the places I know about who have spoken out at the Village Pump. I don't think it has to do with geolocation. It has been happening for at least a week. I've taken a break from editing Wikipedia because it is just too frustrating at this point.
Comment 6 Robert Myers 2011-05-20 07:25:47 UTC
I'm having the very same issues (in Australia), at times you only get the background image loaded or just half the page. I'm not having the issues on Commons, just Wikipedia. Just to get a page fully loaded sometimes takes five or more refreshes. Frustrating is an understatement, but this has been occurring for the last four to five days.
Comment 7 Erik Moeller 2011-05-20 21:27:06 UTC
[Also posting to Bugzilla]

According to the ops team, there are a number of separate and unrelated ops issues that have come up in the last few days:

1) Not all users are experiencing slowness, but a subset of users are. There's no definite smoking gun, but the most likely cause are ongoing issues with one of our routers in Tampa. The router will have to be taken down for maintenance to fix this issue, and order to perform this maintenance operation with minimal disruption, we need to have key ops engineers on standby to deal with any issues that may arise. My understanding is that the best available maintenance window is Tuesday next week.

2) There was a software deployment on May 18 which caused an application server overload; it was reverted the same day.

3) The mobile servers are currently intermittently overloaded, throwing internal server errors, and servers to provide additional capacity have been racked today.

4) In case you're looking at it, ganglia.wikimedia.org is not displaying correct server status information (as of yesterday); it's in the process of being fixed.

We're still in the process of setting up a new primary data center location in Ashburn, VA, which will give us higher site reliability in general, and also create the possibility of safe failover in maintenance or emergency situations.
Comment 8 Étienne Beaulé 2011-05-24 21:21:41 UTC
This is the cause that I found.  It is that wikipedia's bandwidth is getting closer and closer to the maximum.  It makes that page load is taking more time and edits are even harder.
Comment 9 Étienne Beaulé 2011-05-24 21:27:19 UTC
(In reply to comment #5)
> This issue is affecting people in all parts of the US, in the UK, Australia,
> and Hong Kong, and those are only the places I know about who have spoken out
> at the Village Pump. I don't think it has to do with geolocation. It has been
> happening for at least a week. I've taken a break from editing Wikipedia
> because it is just too frustrating at this point.

Hey! Globalize!  Canada is affected too.
Comment 10 Nemo 2011-06-04 07:17:01 UTC
[[wikitech:Planned Maintenance 24May2011]]: «The team performed the operation successfully - the upgrades and reboots on those network gears went smoothly and the servers and sites came back up on scheduled. We believe we have also addressed the lag in the page load caused by the network routing problem.»
And nobody is complaining any longer.

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