[appengine-java] Re: Weird performance problem last 3 days or so
To clarify: yes, I do realize the message means my data store is empty: so I need a new theory of why it took 80 seconds to get a home page this morning. On Mar 23, 8:01 am, mdt wrote: > No, I haven't. Interesting idea. I have convinced myself, however, > that it is a data store problem. We use the data store currently just > to store subscription email addresses, which we use outside the app. > Every time someone subscribes, performance tanks, I note the address > and clear out the data store, and performance goes back to normal. > OTOH, this morning I can't clear out the data store because of: > > "Oops! We couldn't retrieve your list of Kinds. Please try again > later." > > Obviously, we don't need to be using the data store for this (we had > plans to use it more), so my next project is to stop using it > altogether. > > Sigh! Thanks for the suggestion, though. > > On Mar 15, 2:59 pm, WillSpecht wrote: > > > > > > > > > Has anyone tried deploying a different app to the slow appid then > > redploying the old app? -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Weird performance problem last 3 days or so
No, I haven't. Interesting idea. I have convinced myself, however, that it is a data store problem. We use the data store currently just to store subscription email addresses, which we use outside the app. Every time someone subscribes, performance tanks, I note the address and clear out the data store, and performance goes back to normal. OTOH, this morning I can't clear out the data store because of: "Oops! We couldn't retrieve your list of Kinds. Please try again later." Obviously, we don't need to be using the data store for this (we had plans to use it more), so my next project is to stop using it altogether. Sigh! Thanks for the suggestion, though. On Mar 15, 2:59 pm, WillSpecht wrote: > Has anyone tried deploying a different app to the slow appid then > redploying the old app? > -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
Re: [appengine-java] Re: Weird performance problem last 3 days or so
In case it helps you I'll point out that my "strategy" of deploying the same code under a different appid continues to work, and this morning I switched the domain over to the other appid. This new deployment continues to be lightning fast. The appid I'm using is not new, but has never been used for this app before. I'll also re-emphasize that the new instance has no data in the persistent store, while the other one has a little data that it never uses (long story). -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Weird performance problem last 3 days or so
Some more information on this -- looking through the logs I didn't occur to me to expand the entries for the long latency queries, but when I did I found: The process handling this request unexpectedly died. This is likely to cause a new process to be used for the next request to your application. (Error code 203) -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Weird performance problem last 3 days or so
Actually, I overstated things. The app actually now uses persistence VERY LITTLE, and only on one page. But the persistent store on the second deployment is empty. It would be strange if this was the problem, but it could be. Thanks again! -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Re: Weird performance problem last 3 days or so
The app doesn't use persistence at all: all the data it uses is read from resource files ... and I believe these to be identical in both cases. ( The app did use persistence and the cache API up to about 6 weeks ago, but no longer. ) A couple of pages use an HTTP callout to an RSS feed, but the problems appears with _all_ the pages. Most pages use Google charts in some way, but I don't believe resulting latency would show up on the server, and the two deployments make identical chart requests. I'm sure we'll hit the wall with our primitive approach sometime, but for now it works quite well. Except when it doesn't 8-). Thanks for your idea, though! -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
[appengine-java] Weird performance problem last 3 days or so
For the last couple of days our app performance has tanked, with requests that used to take a second or so taking up to 30 seconds. Since we've made "minor changes" that "probably aren't the cause" something gave me the idea of deploying the same code under a separate name, and comparing the two. That is, let's say we have foo.appspot.com normally, I deployed the SAME code as bar.appspot.com. The foo deployment crawls, and the bar deployment is fine. So it's as if the production app name has gotten messed up somehow. (Yes, I also tried yet another new deployment under the old app name). The two deployments, AFAIK, differ only in that the production version is linked to a custom domain name, but I've reproduced this problem using the appspot.com domain only, so it's clearly not a DNS problem (also, I see the really long latencies in the appengine logs). We've been using app engine for Java successful for this app for six months, so we're not complete novices, but could still be doing something dumb. Any ideas how to diagnose this? Any help appreciated: this is threatening a venture that was just barely getting off the ground. Oh, I thought of deleting the app and recreating, but I'm afraid I'll have trouble recreating it and then have to go messing with DNS mapping. Thanks in advance! -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to google-appengine-java@googlegroups.com. To unsubscribe from this group, send email to google-appengine-java+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
