Re: speed limit
On 8/16/07, Jen mlists [EMAIL PROTECTED] wrote: Is it possible to write speed limit module (for file downloading) by modperl rather than using Apache's official module? Yes, you have the full Apache API available to you from mod_perl. If you look on CPAN, you may find something like this already. - Perrin
Re: speed
On Sat, 20 Aug 2005, Octavian Rasnita wrote: Hi, I have made a site using mod_perl with ModPerl::Registry. It works much faster than using a simple cgi script, but it still works slow sometimes and I would like to change some things. There are 3 situations: 1. The page is displayed pretty fast (less than a second) 2. The same kind of page is displayed very slow (more than 20 seconds) 3. The same kind of page, sometimes is still Opening page... for tens of seconds, and after that appears a 404 Not Found error. If I refresh that page immediately after that, it is displayed very fast with no problem. Please tell me how I can test: - Why that 404 error appears - Why sometimes it takes so long to display the same kind of page other times displays much faster - How can I test where the script hangs, which part of the script is so slow I assume, for the delay problem, you've ruled out correlations with a (momentary) high server load? Does the script involve a database connection that may sometimes be a bottleneck? Does anything useful appear in the error log? The Apache ab program may be useful in this regard. At least for linux, the Apache::DB module (see especially Apache::SmallProf) may help in tracking down where the script is spending most of its time. If these don't help, can you post a minimal script, and configuration, which illustrates the problem? -- best regards, randy kobes
Re: speed
Randy Kobes wrote: At least for linux, the Apache::DB module (see especially Apache::SmallProf) may help in tracking down where the script is spending most of its time. Actually, I'm thiking you mean Apache::DProf just make sure you look it EARLY enough as Perrin has said before to other posters. -- END What doesn't kill us can only make us stronger. Nothing is impossible. Philip M. Gollucci ([EMAIL PROTECTED]) 301.254.5198 Consultant / http://p6m7g8.net/Resume/ Senior Developer / Liquidity Services, Inc. http://www.liquidityservicesinc.com http://www.liquidation.com http://www.uksurplus.com http://www.govliquidation.com http://www.gowholesale.com
Re: speed
From: Randy Kobes [EMAIL PROTECTED] Subject: Re: speed I assume, for the delay problem, you've ruled out correlations with a (momentary) high server load? No. Unfortunately not. The server has no load, because it is a test server and I am the only user. It works locally, so the internet connection speed is not an issue either. Does the script involve a database connection that may sometimes be a bottleneck? Yes it involves a MySQL connection, but that MySQL database and that server is not used by someone else so I don't understand why some pages show so fast while others so slow. Tddy
Re: speed
Octavian Rasnita wrote: Yes it involves a MySQL connection, but that MySQL database and that server is not used by someone else so I don't understand why some pages show so fast while others so slow. Could be that MySQL has the queries cached in memory for some pages which would be a substantial speed increase. Other times, these queries might not be cached. Depending on how much memory you have available for the DB and how often the queries get used determines whats currently in the cache. -- END What doesn't kill us can only make us stronger. Nothing is impossible. Philip M. Gollucci ([EMAIL PROTECTED]) 301.254.5198 Consultant / http://p6m7g8.net/Resume/ Senior Developer / Liquidity Services, Inc. http://www.liquidityservicesinc.com http://www.liquidation.com http://www.uksurplus.com http://www.govliquidation.com http://www.gowholesale.com
Re: speed
On Mon, 2005-08-22 at 20:47 +0300, Octavian Rasnita wrote: No. Unfortunately not. The server has no load, because it is a test server and I am the only user. It works locally, so the internet connection speed is not an issue either. Sounds like an HTTP browser-compatibility problem to me. IE is notorious for having SSL problems that leave the connection stuck or slow. Try a different browser to test if that could be the problem. - Perrin
Re: speed
From: Philip M. Gollucci [EMAIL PROTECTED] Octavian Rasnita wrote: Yes it involves a MySQL connection, but that MySQL database and that server is not used by someone else so I don't understand why some pages show so fast while others so slow. Could be that MySQL has the queries cached in memory for some pages which would be a substantial speed increase. Other times, these queries might not be cached. Depending on how much memory you have available for the DB and how often the queries get used determines whats currently in the cache. I don't think this is the problem, because that site shows more articles, and each article has a counter that appears on the page. I am trying only articles that have the counter 0, so nobody visited that page so MySQL couldn't make a cache of that specific query. Thank you. Teddy
Re: speed
Octavian Rasnita wrote: I don't think this is the problem, because that site shows more articles, and each article has a counter that appears on the page. I am trying only articles that have the counter 0, so nobody visited that page so MySQL couldn't make a cache of that specific query. My best guess is bench mark each section: DB time, PERL time, bandwith, SSLtime and see which one it is -- END What doesn't kill us can only make us stronger. Nothing is impossible. Philip M. Gollucci ([EMAIL PROTECTED]) 301.254.5198 Consultant / http://p6m7g8.net/Resume/ Senior Developer / Liquidity Services, Inc. http://www.liquidityservicesinc.com http://www.liquidation.com http://www.uksurplus.com http://www.govliquidation.com http://www.gowholesale.com
Re: speed
Please tell me how I can test: - Why that 404 error appears - Why sometimes it takes so long to display the same kind of page other times displays much faster - How can I test where the script hangs, which part of the script is so slow I'd look into your apache error logs you can also do a print STDERR crap on certain blocks of code and tail -f /var/log/apache/mp_errorlog (thats my error log for modperl) then look to see where stuff is hanging
