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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Very unfortunate for them that the new e-petition site was launched at just the same time as all the excitement about the death penalty debate was happening. I would hazard a guess that this alone would have sparked many more visits to their site than I think they would have expected prior to go-live.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Once the team have nailed their performance problems then hearing from them what happened, how they fixed it, what they’ve learnt etc would make a really interesting future LRUG talk/case study. Any chance of that happening? <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>FWIW ref the original question – I support James Harrison’s view of keeping an eye on your slow pages and your slow queries and always always making them faster, before they become the bottleneck. I really like the new relic monitoring (<a href="http://www.newrelic.com">www.newrelic.com</a>) and you apparently get it for free with a number of hosting companies. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>With the types of apps that I tend to do I have always found getting half a dozen people with a few browsers to hammer the site (perhaps running on a number of VMs) gives you a great indication of where your bottlenecks are going to be. Dunno if I dare mention it on this list but I’ve also got HP LoadRunner for some of our load tests currently (long story). <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>a<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> <a href="mailto:chat-bounces@lists.lrug.org">chat-bounces@lists.lrug.org</a> <a href="mailto:[mailto:chat-bounces@lists.lrug.org]">[mailto:chat-bounces@lists.lrug.org]</a> <b>On Behalf Of </b>Mickael Riga<br><b>Sent:</b> 05 August 2011 09:47<br><b>To:</b> James Cumming; London Ruby Users Group<br><b>Subject:</b> Re: [LRUG] e-petitions site<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hello,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Well, the simple use of `ab` utility already gives a lot of informations.<o:p></o:p></p></div><div><p class=MsoNormal>The most difficult thing is to predict your success and what is gonna be a "high" level.<o:p></o:p></p></div><div><p class=MsoNormal>Anyway it will always be harder to build a high volume website in Ruby and especially in Ruby on Rails.<o:p></o:p></p></div><div><p class=MsoNormal>I am sure that most of the time, the really high consuming bit could be placed in a separate faster middleware dedicated to a specific task.<o:p></o:p></p></div><div><p class=MsoNormal>Things like APIs I mean.<o:p></o:p></p></div><div><p class=MsoNormal>But like you, I don't know what went wrong in that case.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>mig<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On 5 Aug 2011, at 09:17, James Cumming wrote:<o:p></o:p></p></div><p class=MsoNormal><br><br><o:p></o:p></p><div><div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Hi All<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Newspapers this morning report that the e-petitions site crashed on launch, due to high volume (1,000 visitors a minute registering proposals) . Just wondering if it would be worth while investigating this further as to why this happened and how to avoid something like this happening in future RoR projects. <o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>What's the best to test a site for high volume?<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Cheers<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> <o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><i><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>James Cumming, CFA</span></i><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p></o:p></span></p></div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p></div></div><p class=MsoNormal>_______________________________________________<br>Chat mailing list<br><a href="mailto:Chat@lists.lrug.org">Chat@lists.lrug.org</a><br><a href="http://lists.lrug.org/listinfo.cgi/chat-lrug.org">http://lists.lrug.org/listinfo.cgi/chat-lrug.org</a><o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p></div></div></body></html>