[squid-users] very slow squid response
Antony.Stone at squid.open.source.it
Tue Sep 19 10:34:37 UTC 2017
On Tuesday 19 September 2017 at 11:18:34, Iraj Norouzi wrote:
> hi everybody
> i setup squid on ubuntu and centos
> with tproxy and wccp for 6 gb/s traffic
What hardware are you using for that sort of traffic flow?
> but when i try to test squid with 40 mb/s traffic
How are you generating "40 mb/s traffic"? I'm assuming that your Internet
connection is 6Gbps as stated above, so how are you restricting this down to
40Mbps for testing?
> it response very slow
> while when i use direct browsing i can browse websites very fast
Is the direct traffic still being routed through the Squid server (you say
you're using tproxy, so I assume this is an intercept machine with the traffic
going through it between client and server)?
> i used tcpdump for tracing connections arrive time and there was no problem,
Arrival time where? From the origin server to Squid? From Squid to the
client? What are you actually measuring?
> i used watch -d for tracing packets match by iptables rules and it was ok,
Please be more specific - what did you measure and what does "OK" mean?
Did you compare with and without Squid in place to see what differs?
> i also used iptables trace command for tracing matching iptables rules,
> there was no problem except i had latency on arriving packets on iptables
> rule while tcpdump captured packets fast, it happened when my browsing was
> so slow, at some times that my browsing was fast there was no latency on
> iptables trace log.
That description is too vague to know exactly what you were measuring and what
results you got.
> i also used tcp and linux enhancement configurations
> but nothing happened.
> wccp send packets very well and tcpdump show capturing packets too but
> browsing with squid is very slow.
Firstly, please define "slow" - do you mean it takes a long time for new web
pages / images / etc to appear (but once they start, they arrive quickly), or
do you mean that a continuous stream of data (a "download") arrives more
slowly when going through Squid than going direct (and if so, what are the
Secondly, what are you trying to achieve with Squid - what is its purpose in
> please help me.
Please help us - give us more details about the hardware you're running this
on, the version of Squid you're using, what WCCP routing / filtering you're
doing, the measurements you've made and the results you got.
We all get the same amount of time - twenty-four hours per day.
How you use it is up to you.
Please reply to the list;
please *don't* CC me.
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