In my FC7, using Firefox, if for example, I access www.google.com, I get an essentially instantaneous response. If I then close the browser, reopen it, and again try to access google, there is a long delay, perhaps a minute before I get the response. (I note that my browser is set to delete all private on closing.) During this delay, the browser reports that it is looking up the URL. If I then wait a few minutes I can repeat the whole scenario.
I suspect that something similar may be happening with my Pan news reader.
Any suggestions?
Thanks, Mike.
On Tue, Oct 28, 2008 at 9:00 AM, Mike -- EMAIL IGNORED m_d_berger_1900@yahoo.com wrote:
In my FC7, using Firefox, if for example, I access www.google.com, I get an essentially instantaneous response. If I then close the browser, reopen it, and again try to access google, there is a long delay, perhaps a minute before I get the response. (I note that my browser is set to delete all private on closing.) During this delay, the browser reports that it is looking up the URL. If I then wait a few minutes I can repeat the whole scenario.
I suspect that something similar may be happening with my Pan news reader.
Any suggestions?
It seems your DNS lookup is intermittently slow. I'd log into the router/web gateway (192.168.1.1 in your browser or so) and run the DNS lookup diagnostic test - if it is shows similar behaviour, you will know it's a problem with your internet provider. I used to see such problems in the past and IIRC they always cleared up upon talking to the provider.
Peter
For once, a reason not to ignore mail from the guy named e-mail ignored.
On Tue, 28 Oct 2008 09:11:50 -0700, Peter Langfelder wrote:
[...]
It seems your DNS lookup is intermittently slow. I'd log into the router/web gateway (192.168.1.1 in your browser or so) and run the DNS lookup diagnostic test - if it is shows similar behaviour, you will know it's a problem with your internet provider. I used to see such problems in the past and IIRC they always cleared up upon talking to the provider.
Peter
I actually have two routers, and in neither could I find the DNS test you mention. However, on the same LAN I have three MSWin boxes, two XP and one 2k, and none of these have exhibited the same problem. Does this not rule out the provider?
Mike.
Mike -- EMAIL IGNORED wrote:
In my FC7, using Firefox, if for example, I access www.google.com, I get an essentially instantaneous response. If I then close the browser, reopen it, and again try to access google, there is a long delay, perhaps a minute before I get the response. (I note that my browser is set to delete all private on closing.) During this delay, the browser reports that it is looking up the URL. If I then wait a few minutes I can repeat the whole scenario.
I suspect that something similar may be happening with my Pan news reader.
Any suggestions?
Thanks, Mike.
Does this happen with any other browsers? I know Pan can be really sluggish at times, so I tend to discount that app as far as network reaction times go.
Does opera or Konqueror do that? I haven't seen this problem in FF on my Fedora boxes.
I actually have two routers, and in neither could I find the DNS test you mention. However, on the same LAN I have three MSWin boxes, two XP and one 2k, and none of these have exhibited the same problem. Does this not rule out the provider?
I'm not sure - IIRC Windows uses a local DNS cache so it doesn't go through a DNS server every time. You can clear the DNS cache and try it again on Windows to make sure.
On my router (Westell something) the DNS test is under the Advanced->Diagnostics tab.
Peter
On Tue, 28 Oct 2008 14:05:03 -0400, Mark Haney wrote:
Mike -- EMAIL IGNORED wrote:
[...]
Does this happen with any other browsers? I know Pan can be really sluggish at times, so I tend to discount that app as far as network reaction times go.
Does opera or Konqueror do that? I haven't seen this problem in FF on my Fedora boxes.
[...]
Well I am not conversant with Konqueror, but I tried it. The first few tries were very slow, but now it takes only a few seconds -- still, not as fast as Firefox. Repetition does not slow Konqueror, but them I don't know how to get it to delete its data.
The most interesting finding is this. After having been away from the box for a few hours, I tried Konqueror a few times as described above. I then tried Firefox. It was instantaneous on the first try. On subsequent tries it was very slow, as previously described. In other words, it seems that the DNS queries of Konqueror do not interact with those of Firefox.
FWIW, I also tried "dig www.google.com". Repeated digs all respond immediately.
In summery, it appears at this time that the repeated DNS problem (if it is really that) is isolated to Firefox. Most peculiar.
Thanks for your thoughts. Mike.
On Tue, 28 Oct 2008 11:55:29 -0500, George Yanos wrote:
For once, a reason not to ignore mail from the guy named e-mail ignored.
[...]
Thanks for your appreciation. Of course, I have several e-mail addresses. The yahoo address is used only for newsgroups. Every few weeks I log on and delete all of the large number of messages without looking at them. This, of course, substantially reduces the spam I get at my other e-mail addresses.
Mike.
On 10/28/2008 08:19 PM, Mike -- EMAIL IGNORED wrote:
In summery, it appears at this time that the repeated DNS problem (if it is really that) is isolated to Firefox.
A couple of things first. There is a daemon, nscd that causes DNS to cache locally. Additionally, is your Linux system using a static IP, and if so, how does it have DNS configured, through the router or locally. Then on Windows, bring up a comand prompt and run "ipconfig /all", and look at the name servers.
If nscd is not running, manually start it:"sudo service nscd start" You could also start it with the system service menu also.
Also, your name servers are in /etc/resolv.conf
This list should be similar to your Windows ones. It is possible that your primary name server could be offline, or far away. Since your Windows systems do not exhibit this problem, it is probably something unique to the way you have F9 configured.
You also might be able to use ping to trouble shoot the problem. Remember, with firefox, and other browsers you are possibly hitting a number of different web servers so that by not caching DNS locally, it is costing you.
On Fri, Oct 31, 2008 at 02:49:46PM -0400, Jerry Feldman wrote:
On 10/28/2008 08:19 PM, Mike -- EMAIL IGNORED wrote:
In summery, it appears at this time that the repeated DNS problem (if it is really that) is isolated to Firefox.
A couple of things first. There is a daemon, nscd that causes DNS to cache locally. Additionally, is your Linux system using a static IP, and if so, how does it have DNS configured, through the router or locally. Then on Windows, bring up a comand prompt and run "ipconfig /all", and look at the name servers.
If nscd is not running, manually start it:"sudo service nscd start" You could also start it with the system service menu also.
Also, your name servers are in /etc/resolv.conf
This list should be similar to your Windows ones. It is possible that your primary name server could be offline, or far away. Since your Windows systems do not exhibit this problem, it is probably something unique to the way you have F9 configured.
You also might be able to use ping to trouble shoot the problem. Remember, with firefox, and other browsers you are possibly hitting a number of different web servers so that by not caching DNS locally, it is costing you.
Good stuff.
If it is 'only' Firefox look at the network setup of both. It is common for ISPs and even wireless hot spots to insert a caching server or proxy in the mix.
Check your broswer setup Mozilla-->edit-->preferences-->network-->connection-->Settings-->Configure-Proxies....
There are four choices in mozilla.... Compare and contrast -- take notes prior to changing anything.
On Fri, 31 Oct 2008 14:49:46 -0400, Jerry Feldman wrote:
On 10/28/2008 08:19 PM, Mike -- EMAIL IGNORED wrote:
In summery, it appears at this time that the repeated DNS problem (if it is really that) is isolated to Firefox.
A couple of things first. There is a daemon, nscd that causes DNS to cache locally. Additionally, is your Linux system using a static IP, and if so, how does it have DNS configured, through the router or locally. Then on Windows, bring up a comand prompt and run "ipconfig /all", and look at the name servers.
If nscd is not running, manually start it:"sudo service nscd start" You could also start it with the system service menu also.
Also, your name servers are in /etc/resolv.conf
This list should be similar to your Windows ones. It is possible that your primary name server could be offline, or far away. Since your Windows systems do not exhibit this problem, it is probably something unique to the way you have F9 configured.
You also might be able to use ping to trouble shoot the problem. Remember, with firefox, and other browsers you are possibly hitting a number of different web servers so that by not caching DNS locally, it is costing you.
-- Jerry Feldman gaf@blu.org Boston Linux and Unix PGP key id: 537C5846 PGP Key fingerprint: 3D1B 8377 A3C0 A5F2 ECBB CA3B 4607 4319 537C 5846
Thanks for this; starting nscd solved the problem. Firefox is now fine, and I may have also improved pan, but I'll have to wait for a weekday daytime (at -0500) to be sure, because at other times there is less of a problem.
FYI, My name server primary is set to my router which, in turn, is set to nameservers from my provider (Verizon). The secondary is also set to one provided by Verizon. Also my WAN and all my LAN IP addresses are static.
Mike.
On Fri, 31 Oct 2008 16:24:30 -0700, Nifty Fedora Mitch wrote:
On Fri, Oct 31, 2008 at 02:49:46PM -0400, Jerry Feldman wrote:
[...]
Good stuff.
Yes, it solved the problem
If it is 'only' Firefox look at the network setup of both. It is common for ISPs and even wireless hot spots to insert a caching server or proxy in the mix.
Check your broswer setup Mozilla-->edit-->preferences-->network-->connection-->Settings-- Configure-Proxies....
There are four choices in mozilla.... Compare and contrast -- take notes prior to changing anything.
-- T o m M i t c h e l l Found me a new hat, now what?
FYI, the Linux Firefox is set to "Direct connection to the Internet", and on WinXP, it is "No Proxy", which I guess is the same thing.
Thanks for your help. Mike.
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George Yanos -
Jerry Feldman -
Mark Haney -
Michael D. Berger -
Nifty Fedora Mitch -
Peter Langfelder