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Strange latency from Squid 2.5 to Squid 2.6

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Hi!

I've changed my old server gateway/proxy with Squid 2.5 STABLE14, with
a new Proxy server with Squid 2.6.STABLE18 (Ubuntu 8.04LTS).

Now I have low reply from some text-page (CGI-BIN) of intra-vpn site.

Also "tcpdump" show a latency not present with old squid or directly
without new proxy!

Heare a dump with 4 sec of wait for reply.

---
09:30:40.015121 IP 192.168.1.1.48747 > xxx.x.xxx.xx.80: . ack 1 win 92
<nop,nop,timestamp 22828170 191332533>
09:30:40.015176 IP 192.168.1.1.48747 > xxx.x.xxx.xx.80: . 1:1339(1338)
ack 1 win 92 <nop,nop,timestamp 22828170 191332533>
09:30:40.015192 IP 192.168.1.1.48747 > xxx.x.xxx.xx.80: P
1339:1505(166) ack 1 win 92 <nop,nop,timestamp 22828170 191332533>
09:30:40.092647 IP xxx.x.xxx.xx.80 > 192.168.1.1.48747: . ack 1339 win
25422 <nop,nop,timestamp 191332540 22828170>
09:30:40.093435 IP xxx.x.xxx.xx.80 > 192.168.1.1.48747: . ack 1505 win
25422 <nop,nop,timestamp 191332540 22828170>
09:30:40.141038 IP xxx.x.xxx.xx.80 > 192.168.1.1.48747: . 1:1339(1338)
ack 1505 win 25422 <nop,nop,timestamp 191332544 22828170>
09:30:40.141050 IP 192.168.1.1.48747 > xxx.x.xxx.xx.80: . ack 1339 win
137 <nop,nop,timestamp 22828183 191332544>
09:30:40.141174 IP 192.168.1.1.3128 > 192.168.1.208.1576: P
901:2357(1456) ack 4707 win 17520
09:30:40.339741 IP 192.168.1.208.1576 > 192.168.1.1.3128: . ack 2357 win 17520

09:30:44.327382 IP xxx.x.xxx.xx.80 > 192.168.1.1.48747: FP
1339:1701(362) ack 1505 win 25422 <nop,nop,timestamp 191332964
22828183>
09:30:44.327448 IP 192.168.1.1.48747 > xxx.x.xxx.xx.80: F 1505:1505(0)
ack 1702 win 179 <nop,nop,timestamp 22828601 191332964>
09:30:44.327470 IP 192.168.1.1.3128 > 192.168.1.208.1576: P
2357:2719(362) ack 4707 win 17520
09:30:44.385912 IP xxx.x.xxx.xx.80 > 192.168.1.1.48747: . ack 1506 win
25422 <nop,nop,timestamp 191332970 22828601>
09:30:44.407011 IP 192.168.1.208.1576 > 192.168.1.1.3128: .
4707:6167(1460) ack 2719 win 17158
09:30:44.407030 IP 192.168.1.1.3128 > 192.168.1.208.1576: . ack 6167 win 20440
09:30:44.407041 IP 192.168.1.208.1576 > 192.168.1.1.3128: P
6167:6411(244) ack 2719 win 17158
09:30:44.407051 IP 192.168.1.1.3128 > 192.168.1.208.1576: . ack 6411 win 23360
09:30:44.407210 IP 192.168.1.1.53914 > xxx.x.xxx.xx.80: S
2661713311:2661713311(0) win 5840 <mss 1460,sackOK,timestamp 22828609
0,nop,wscale 6>
09:30:44.407437 IP 192.168.1.208.1576 > 192.168.1.1.3128: P
6411:6431(20) ack 2719 win 17158
09:30:44.407452 IP 192.168.1.1.3128 > 192.168.1.208.1576: . ack 6431 win 23360
---

These policy are alredy present:
..
hierarchy_stoplist cgi-bin ?
acl QUERY urlpath_regex cgi-bin \?
cache deny QUERY
..

What can I do?
Thanks!

Best Regards

---
Sim

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