Re: Row caching + Wide row column family == almost crashed?

2012-12-04 Thread aaron morton
I responded on your other thread. Cheers - Aaron Morton Freelance Cassandra Developer New Zealand @aaronmorton http://www.thelastpickle.com On 4/12/2012, at 5:31 PM, Yiming Sun yiming@gmail.com wrote: I ran into a different problem with Row cache recently, sent a message

Re: Row caching + Wide row column family == almost crashed?

2012-12-04 Thread Yiming Sun
Yup, got it. Thanks Aaron. On Tue, Dec 4, 2012 at 4:47 AM, aaron morton aa...@thelastpickle.comwrote: I responded on your other thread. Cheers - Aaron Morton Freelance Cassandra Developer New Zealand @aaronmorton http://www.thelastpickle.com On 4/12/2012, at

Re: Row caching + Wide row column family == almost crashed?

2012-12-04 Thread Mike
Thanks for all the responses! On 12/3/2012 6:55 PM, Bill de hÓra wrote: A Cassandra JVM will generally not function well with with caches and wide rows. Probably the most important thing to understand is Ed's point, that the row cache caches the entire row, not just the slice that was read

Re: Row caching + Wide row column family == almost crashed?

2012-12-03 Thread aaron morton
Disabling row caching on this new column family has resolved the issue for now, but, is there something fundamental about row caching that I am missing? What cache provider were you using ? Check the row_cache_provider setting in the yaml file. If you were using the

Re: Row caching + Wide row column family == almost crashed?

2012-12-03 Thread Bill de hÓra
A Cassandra JVM will generally not function well with with caches and wide rows. Probably the most important thing to understand is Ed's point, that the row cache caches the entire row, not just the slice that was read out. What you've seen is almost exactly the observed behaviour I'd expect

Re: Row caching + Wide row column family == almost crashed?

2012-12-03 Thread Yiming Sun
I ran into a different problem with Row cache recently, sent a message to the list, but it didn't get picked up. I am hoping someone can help me understand the issue. Our data also has rather wide rows, not necessarily in the thousands range, but definitely in the upper-hundreds levels. They

Row caching + Wide row column family == almost crashed?

2012-12-02 Thread Mike
Hello, We recently hit an issue within our Cassandra based application. We have a relatively new Column Family with some very wide rows (10's of thousands of columns, or more in some cases). During a periodic activity, we the range of columns to retrieve various pieces of information, a

Re: Row caching + Wide row column family == almost crashed?

2012-12-02 Thread Edward Capriolo
Row cache has to store the entire row. It is a very bad option for wide rows. On Sunday, December 2, 2012, Mike mthero...@yahoo.com wrote: Hello, We recently hit an issue within our Cassandra based application. We have a relatively new Column Family with some very wide rows (10's of