Ikai, The problem is that i am not sure when the values in the cache will be accessed. but anyways i have implemented it in such a way that if the value is not found in cache it goes to database to fetch it, but another issue there is that if you are making the database connection first time after the new jvm instance has been kicked off as it happens in Appengine, db connection takes a while, sometimes around 6-7 seconds, which is kind of slow.
Nicolas, Thats the reason i am fetching the data if not found in cache. Thanks, Rahul ---------------------------------------------------------- Rahul Juneja http://techlabs.thoughtclicks.com On Tue, Jun 1, 2010 at 9:41 PM, Ikai L (Google) <ika...@google.com> wrote: > The items will get flushed if they are not getting used. If you're using > items once every 24 hours ... you probably do not need a cache. Use the > datastore instead. Rather than prevent the items from being flushed, build > the ability to regenerate the cache into your system or don't even bother > with Memcache. > > On Tue, Jun 1, 2010 at 6:24 PM, Rahul Juneja <rahul.jun...@gmail.com>wrote: > >> Ikai, >> >> I think you are right that the cache values are expiring via LRU as >> sometimes only some elements of the cache are flushed. >> But the question is my cache only has 20-30 entries and out of that 10 >> least recently used entries are being flushed. Is there any way i can >> prevent this flushing as i don't want to flush if the cache is so small >> instead i want the cache only to flush LRU elements when the cache grows in >> size to maybe 100,000 entries. >> >> Any clues ? >> >> Thanks, >> Rahul >> >> ---------------------------------------------------------- >> Rahul Juneja >> http://techlabs.thoughtclicks.com >> >> >> On Tue, Jun 1, 2010 at 6:56 PM, Ikai L (Google) <ika...@google.com>wrote: >> >>> No, there isn't a default expiration. How are you setting values to the >>> cache? Could you be expiring the items via LRU? That is - you're not using >>> the items in the cache, instead setting other items and pushing the older, >>> unused items out? >>> >>> On Wed, May 26, 2010 at 6:43 PM, Rahul <rahul.jun...@gmail.com> wrote: >>> >>>> I have a memcache and not to mention it does live between different >>>> jvm instances when new jvm instances starts, i can access the cache >>>> but once a while i don't find any values in cache and this happened >>>> twice in last 24 hours. Is there any default expiration which is less >>>> then 24-48 hours which i am not aware of. >>>> >>>> Any help or pointers on this is appreciated. >>>> >>>> Thanks, >>>> Rahul >>>> >>>> -- >>>> 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-j...@googlegroups.com. >>>> To unsubscribe from this group, send email to >>>> google-appengine-java+unsubscr...@googlegroups.com<google-appengine-java%2bunsubscr...@googlegroups.com> >>>> . >>>> For more options, visit this group at >>>> http://groups.google.com/group/google-appengine-java?hl=en. >>>> >>>> >>> >>> >>> -- >>> Ikai Lan >>> Developer Programs Engineer, Google App Engine >>> Blog: http://googleappengine.blogspot.com >>> Twitter: http://twitter.com/app_engine >>> Reddit: http://www.reddit.com/r/appengine >>> >>> -- >>> 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-j...@googlegroups.com. >>> To unsubscribe from this group, send email to >>> google-appengine-java+unsubscr...@googlegroups.com<google-appengine-java%2bunsubscr...@googlegroups.com> >>> . >>> For more options, visit this group at >>> http://groups.google.com/group/google-appengine-java?hl=en. >>> >> >> -- >> 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-j...@googlegroups.com. >> To unsubscribe from this group, send email to >> google-appengine-java+unsubscr...@googlegroups.com<google-appengine-java%2bunsubscr...@googlegroups.com> >> . >> For more options, visit this group at >> http://groups.google.com/group/google-appengine-java?hl=en. >> > > > > -- > Ikai Lan > Developer Programs Engineer, Google App Engine > Blog: http://googleappengine.blogspot.com > Twitter: http://twitter.com/app_engine > Reddit: http://www.reddit.com/r/appengine > > -- > 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-j...@googlegroups.com. > To unsubscribe from this group, send email to > google-appengine-java+unsubscr...@googlegroups.com<google-appengine-java%2bunsubscr...@googlegroups.com> > . > For more options, visit this group at > http://groups.google.com/group/google-appengine-java?hl=en. > -- 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-j...@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.
