We're experiencing problems when downloading files; sometimes the downloads are retrieved quickly, sometimes slowly.
In IE it's always slow, in FF or Chrome it tends to vary.
Our setup is: webcache -> http-server -> weblogic.
The downloaded files are not cached by webcache.
It's a local setup, so files are downloaded over LAN and when quick, an 8mb file s retrieved in a second.
When slow a download comes in at 100kb/s, and it seems to come in at 1mb bursts every 10 sec.
When the webcache is bypassed, and we download from the httpserver or weblogic directly, there's never a slowdown.
So it seems webcache is interfering somehow.
I've set the event log to debug mode, and the only difference between a quick and a slow download is this line.
[2011-02-02T15:18:35+01:00] [webcache] [TRACE:32] [WXE-14046] [backend] [ecid: 653466200783,0:1] Origin server response is being throttled.
Does anyone have some info on what's going on here and if/how it can be disabled ?
I can't find any info on this feature anywhere other than this page where something similar is mentioned:
Caveat --- while the workarounds may alleviate some of the performance issues to some degree, they do not fix the problem. Despite extensive configuration and testing (including the "workarounds"), we have been unable to match the performance of WebCache 10g, especially with large file downloads.