Just did one quick test, it takes about 24 s to spin up an instance. I guess all this code we've written has added about 10 s of startup time. So far it hasn't been a problem because we reserve instances.
Oh there's one other trick that we do. We map /_ah/warmup to a servlet that exercises as much of our stack as possible. We use Spring 3.0.x. Our lib folder shows 47 individual JARs (including our own). Yikes! On Apr 10, 6:12 am, Tomas <tomas.ada...@gmail.com> wrote: > Hi, I've done all of those already and nothing helps. > > As I said - the simplest MVC with just minimal spring libraries (excluding > jpa/jdo app engine lib) with one JSP with only htm in it tak 13+ secs to > startup. > > I've spent two days trying to optimize everything (annotations support, > scanning, repacking to bigger jars) but nothing helps. > > 1) what version of spring do you use (maybe the 3.1 is causing troubles) > 2) how many other libraries did you have in your application > > Thanks. > > > > > > > > On Monday, 9 April 2012 17:48:35 UTC+12, jon wrote: > > > Our app is also Spring-based. We did some optimisation about a year > > ago. Don't really remember how quickly we got our app to start. I > > think it was in the ballpark of the 13s result you got. 50s is too > > long. > > > Here's what we've done: > > * combine our own classes into one JAR > > * reduce dependencies as much as possible (exclude unnecessary JPA/JDO > > dependencies if you're not using them) > > * turn off Spring autoscan (we list Controllers explicitly, but we do > > use annotations inside the Controllers) > > * use static instead of dynamic JSP includes when possible > > * turn on JSP precompilation > > * there may be a few other things I'm forgetting > > > On Apr 8, 6:16 pm, Tomas <tomas.ada...@gmail.com> wrote: > > > Hi guys, > > > > I've decided to convert my servlet/jdo based app engine app to spring > > mvc > > > (the current app is starting to limit me on doing quick > > > changes/improvements in the code and as I have quite good experience > > with > > > spring on standard non cloud platforms I've decided to give it a go). > > > > So I've put together project including: > > > > - Spring + Spring MVC + Apache Velocity > > > - ehcache + spring-annotations for ehcache + own decorators/interceptors > > > for appengine memcached > > > - objectify > > > - some other util classes ie jsoup, commons (util, baens, logging, > > codec), > > > gdata > > > > The lib directory contains ~42MB of jars (including appengine libraries > > > which makes ~25MB) > > > > After deploy, the app takes 50+ seconds to start (sometime the first > > > request get killed after 60 seconds and another app is started) - I've > > read > > > some articles about speeding up the spring on gae and decided to do > > another > > > little test. I've created testing app containing only spring + spring > > mvc > > > with one controller (no other beans, but had to keep the annotation scan > > > enabled for mvc mapping - but disabled the component scan). The > > controller > > > simply forwards to JSP file with text. Deployed and the page got > > displayed > > > after 13 seconds. > > > > I knew the Spring with all proxies and scanning is not optimal for GAE > > but > > > I wasn't expecting this at all - it seems like the app have issues with > > > simple loading the libraries as I can see how the memory of instance is > > > growing by 1 MB per second. I've tried to: > > > > 1) merge jars into 3-4 bigger ones > > > 2) disable annotations (just for the test as with new spring mvc its > > quite > > > hard to do some better mapping only in xml) > > > 3) lazy load some spring beans > > > > And I can save like 5-10 secods from those 50+ seconds of my startup - > > is > > > it really so bad for everyone or is there some magic setting? > > > > Whats your normal startup time of your spring based app? -- 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 google-appengine+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
