[google-appengine] Too much contention on these datastore entities. please try again.
Hi guys, I know there are other threads with this topic, but they are a little old. I can't seem to code my way out of this error: update point error too much contention on these datastore entities. please try again. I'm only reading and writing to a small data store entity a few times a second. But I still get swamped with these errors in my logs. I'm trying to move the data being accessed into memcache and decrease my load on the datastore, but i'm surprised i need to do this. I'm just updating an object with three statistics based on incoming data. A lot of these errors are coming from a task that is saving data and updating the stats. Is is possible that the task queue is trying to write simultaneously and causing the error? My app id is nimbits1. Ben -- 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.
Re: [google-appengine] Too much contention on these datastore entities. please try again.
Sharding: http://code.google.com/appengine/articles/scaling/contention.html On Oct 5, 2011, at 11:01 AM, Benjamin wrote: huh. It must be that the task queue is attempting several writes in second. I could use some guidance on the best way to handle this kind of demand. I was considering maintaining the statistics in memcache and then having them trickle back into the datastore using a cron task so i can control the frequency. On Oct 5, 10:47 am, Simon Knott knott.si...@gmail.com wrote: I believe that the advised write-rate for a single entity group is 1 write per second. -- 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. -- 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.
