Używam Ubuntu 12.04, Chromium 18.0.1025.151 (Developer Build 130497 Linux) Ubuntu 12.04, Firefox 12.0, ale mam słabą prędkość przeglądania. Przeglądarka zawsze wyświetla „Oczekiwanie na aaa.bbb.com” u dołu przeglądarki. Jak mogę to debugować i znaleźć przyczynę? Łączę się z siecią 3G za pośrednictwem sieci Bluetooth PAN urządzenia z systemem Android. Niektóre statystyki poniżej.
$ dig asdsa.com
; <<>> DiG 9.8.1-P1 <<>> asdsa.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 39878
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 13, ADDITIONAL: 13
;; QUESTION SECTION:
;asdsa.com. IN A
;; ANSWER SECTION:
asdsa.com. 307707 IN A 200.31.91.194
;; AUTHORITY SECTION:
com. 34662 IN NS e.gtld-servers.net.
com. 34662 IN NS a.gtld-servers.net.
com. 34662 IN NS k.gtld-servers.net.
com. 34662 IN NS h.gtld-servers.net.
com. 34662 IN NS g.gtld-servers.net.
com. 34662 IN NS l.gtld-servers.net.
com. 34662 IN NS j.gtld-servers.net.
com. 34662 IN NS c.gtld-servers.net.
com. 34662 IN NS b.gtld-servers.net.
com. 34662 IN NS m.gtld-servers.net.
com. 34662 IN NS d.gtld-servers.net.
com. 34662 IN NS f.gtld-servers.net.
com. 34662 IN NS i.gtld-servers.net.
;; ADDITIONAL SECTION:
a.gtld-servers.net. 50538 IN A 192.5.6.30
a.gtld-servers.net. 59333 IN AAAA 2001:503:a83e::2:30
b.gtld-servers.net. 40208 IN A 192.33.14.30
b.gtld-servers.net. 45531 IN AAAA 2001:503:231d::2:30
c.gtld-servers.net. 45531 IN A 192.26.92.30
d.gtld-servers.net. 45526 IN A 192.31.80.30
e.gtld-servers.net. 45526 IN A 192.12.94.30
f.gtld-servers.net. 40177 IN A 192.35.51.30
g.gtld-servers.net. 35936 IN A 192.42.93.30
h.gtld-servers.net. 40177 IN A 192.54.112.30
i.gtld-servers.net. 45526 IN A 192.43.172.30
j.gtld-servers.net. 45526 IN A 192.48.79.30
k.gtld-servers.net. 35936 IN A 192.52.178.30
;; Query time: 227 msec
;; SERVER: 127.0.0.1#53(127.0.0.1)
;; WHEN: Wed Jun 6 22:40:19 2012
;; MSG SIZE rcvd: 499
$ ping google.com
PING google.com (74.125.236.199) 56(84) bytes of data.
64 bytes from maa03s17-in-f7.1e100.net (74.125.236.199): icmp_req=1 ttl=54 time=173 ms
64 bytes from maa03s17-in-f7.1e100.net (74.125.236.199): icmp_req=2 ttl=54 time=162 ms
64 bytes from maa03s17-in-f7.1e100.net (74.125.236.199): icmp_req=3 ttl=54 time=228 ms
64 bytes from maa03s17-in-f7.1e100.net (74.125.236.199): icmp_req=4 ttl=54 time=236 ms
64 bytes from maa03s17-in-f7.1e100.net (74.125.236.199): icmp_req=5 ttl=54 time=162 ms
64 bytes from maa03s17-in-f7.1e100.net (74.125.236.199): icmp_req=6 ttl=54 time=215 ms
64 bytes from maa03s17-in-f7.1e100.net (74.125.236.199): icmp_req=7 ttl=54 time=218 ms
64 bytes from maa03s17-in-f7.1e100.net (74.125.236.199): icmp_req=8 ttl=54 time=232 ms
64 bytes from maa03s17-in-f7.1e100.net (74.125.236.199): icmp_req=9 ttl=54 time=212 ms
^C
--- google.com ping statistics ---
9 packets transmitted, 9 received, 0% packet loss, time 8007ms
rtt min/avg/max/mdev = 162.119/204.385/236.105/28.286 ms
Czy istnieje także przeglądarka, która zapewnia więcej informacji podczas wczytywania strony?
Edycja: więcej informacji z odpowiedzi @izx
$ curl -w "@curl-timing.cfg" -o /dev/null -s http://www.google.com/
DNS lookup : 0.363
Connect to server (TCP) : 0.512
Connect to server (HTTP/S) : 0.000
Time from start until transfer began: 0.512
Time for redirection (if any) : 0.000
Total time before transfer started : 0.749
Total time : 0.749
Size of download (bytes) : 221
Average d/l speed (bytes/s) : 294.000
$ curl -w "@curl-timing.cfg" -o /dev/null -s http://india.gov.in
DNS lookup : 0.351
Connect to server (TCP) : 0.526
Connect to server (HTTP/S) : 0.000
Time from start until transfer began: 0.526
Time for redirection (if any) : 0.000
Total time before transfer started : 0.770
Total time : 1.643
Size of download (bytes) : 34346
Average d/l speed (bytes/s) : 20905.000
netstat -an
aby zobaczyć, jakie możesz mieć otwarte połączenia ograniczające przepustowość, nie będąc tego świadomym (takie jak mechanizm automatycznej aktualizacji Ubuntu, zapomniany klient torrentów itp.)