On Sat, 29 Jul 2000, Hamid Reza Shahriari wrote:
> I'm using Poly 2.2.9 on Linux with Polymix-2 workload.
> I had so many errors like as:
> #errno count count% explanation
> 32 195 1.08 "Broken pipe"
> 104 3 0.02 "Connection reset by peer"
> 257 2327 12.84 "foreign reply"
> 261 15604 86.07 "connection closed before sending headers"
> I used verbose level 10 and saw that most foreign replies are due to
> cache error pages that imply connection idle timeout.
> Are they due to HTTP race conditions or due to OS overload?
It is most likely the former. Polygraph 2.5.4 can tell the difference
(race conditions are handled by retrying a transaction rather than
reporting an error).
One simple, albeit imperfect, way to test is to disable persistent
connections on Polygraph or proxy side and see if those errors go away.
> Can I use Poly 2.5.4 with Polymix-2 without change?
If you are talking about changing workload files, you most likely will
need to do some adjustments. For example, the PolyMix-2 workload does
not have "file name extensions" in URLs while PolyMix-3 has them (in a
contents.pg file, shared by other workload files). For public tests, you
must use 2.2.9 for PolyMix-2. For in-house, custom tests, you can try to
use current versions.
> (Alex, It seems that a search facility for polygraph mails archive
> like as squid-users can be very useful. Some questions may repeat
> many times.)
Yes, we know and are [still] working on it. Unfortunately, it is hard to
find a decent search engine that meets our criteria. For example, I am
not really satisfied with HtDig or swish-e. Off-list suggestions are
This archive was generated by hypermail 2b29 : Tue Jul 10 2001 - 12:00:14 MDT