[appengine-java] Re: Cache stops returning results under heavy load

2009-12-08 Thread Martin Caslavsky
Sorry, it is dmczum. FYI redeploy of the app helps for a few hours. Martin On Dec 8, 2:20 am, "Ikai L (Google)" wrote: > Martin, > > Can you provide your app ID? I'm not able to look up czumdm. > > On Sun, Dec 6, 2009 at 4:40 PM, Martin Caslavsky wrote: > > > > > Hi, > > > my java app (czumdm) w

[appengine-java] Re: Cache stops returning results under heavy load

2009-12-09 Thread Martin Caslavsky
Yes, cache maps Strings (URLs) to byte[] blobs (RSS feed content). Martin On Dec 10, 12:13 am, "Ikai L (Google)" wrote: > What kind of objects are you storing the cache? Are you storing large binary > objects? > > On Tue, Dec 8, 2009 at 12:23 AM, Martin Caslavsky wrote: > > > > > Sorry, it is dm

[appengine-java] Re: Cache stops returning results under heavy load

2009-12-14 Thread Martin Caslavsky
There are only several objects in the cache (up to 10), each about 10kb. But there is also a bigger one (about 260kb) which I suspect of source of problems. I am afraid I am not able to reproduce the problem. Dec 7: 2600 pageviews, cache occasionally does not work (at least one time started to wor

[appengine-java] Re: Cache stops returning results under heavy load

2009-12-24 Thread jacek.ambroziak
I believe I am experiencing a similar issue. I am using two applications with identical (search engine) code servicing searches against indexes stored in Datastore. To speed up access to index blobs I am using memcache. Experimentally, I enabled billing for one of these apps to check if I would ge

Re: [appengine-java] Re: Cache stops returning results under heavy load

2009-12-09 Thread Ikai L (Google)
What kind of objects are you storing the cache? Are you storing large binary objects? On Tue, Dec 8, 2009 at 12:23 AM, Martin Caslavsky wrote: > Sorry, it is dmczum. > FYI redeploy of the app helps for a few hours. > > Martin > > On Dec 8, 2:20 am, "Ikai L (Google)" wrote: > > Martin, > > > > Ca

Re: [appengine-java] Re: Cache stops returning results under heavy load

2009-12-10 Thread Ikai L (Google)
There are limits to the size of your cache, but Memcache LRU expiration should be pushing out older items, not newer items that are going into the cache. Also, a deploy should not be causing this to occur. What steps can be taken to reproduce this? What are the size of the blobs, and what load can

Re: [appengine-java] Re: Cache stops returning results under heavy load

2009-12-15 Thread Ikai L (Google)
Martin, Let us know if there's a pattern. I'd like to be able to track this down. On Mon, Dec 14, 2009 at 2:58 AM, Martin Caslavsky wrote: > There are only several objects in the cache (up to 10), each about > 10kb. But there is also a bigger one (about 260kb) which I suspect of > source of prob