hi greg the random "blips" might be GAE starting a new interpreter for your app. the duration depends on how many python imports you have, so lazy- loading them can be helpful in reducing this delay
cheers brian On Dec 8, 11:34 pm, Greg <[EMAIL PROTECTED]> wrote: > I uploaded my first real app yesterday, and have had seventy people > hit it. Everything seems to be working like a charm, but those nasty > little average CPU warnings got me worried. My app uses memcache > aggressively, does very few datastore writes, and no page does > extensive processing, so I was surprised to see any warnings. > According to a post I found, I can have two requests of over 1000Mc a > minute, before Appengine starts raising quota exceptions. It also said > that the dashboard figure included datastore megacycles which aren't > included in the quota calculations, and that the log gives accurate > calculations. > > So I did some analysis of the logs. Out of more than 700 non-static > requests, there were 9 high CPU warnings. The URLs that triggered > warnings were pretty diverse, including some that do very little work, > and other hard working pages haven't figured yet. Four were for the > same URL, which logged four events, and in each case there was a long > (0.5 to 1sec) delay between two of the events - but two different > events each time. In one case it was after the request has started but > before the first event, and in another it was between the second and > third events, etc. I.e. the delay was not always at the same part of > the code - it wasn't datastore or memcache calls that caused it. > > I don't have enough data to be completely certain, but it seems that > there are fairly random 0.5 to 1 second "blips" that occasionally hit > my application, and cause CPU warnings. I could imagine these are > caused by the OS or other applications, and my concern is that my > application could get quota exceptions that are not caused by external > factors. And when billing arrives, I'll get charged for them instead. > > Questions: > 1. Has anyone else seen this behaviour? Is everyone getting occasional > CPU warnings, and is anyone getting actual quota exceptions because of > them? > > 2. Has Google any idea what is causing the blips? > > Apart from this, I've enjoyed app engine - once little niggles like > this are ironed out, it is going to be a great platform. Can't wait > for it to come out of preview. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to google-appengine@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en -~----------~----~----~----~------~----~------~--~---
