Re: Lot of pending tasks for writes

2011-04-12 Thread Peter Schuller
> It does appear that I am IO bound. Disks show about 90% util. Well, also pay attention to the average queue size column. If there are constantly more requests waiting to be serviced than you have platters, you're almost certainly I/O bound. The utilization number can be a bit flaky sometimes, al

Re: Lot of pending tasks for writes

2011-04-12 Thread mcasandra
been able to do in parallel because of io issues. -- View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Lot-of-pending-tasks-for-writes-tp6263462p6266706.html Sent from the cassandra-u...@incubator.apache.org mailing list archive at Nabble.com.

Re: Lot of pending tasks for writes

2011-04-12 Thread Peter Schuller
> I am just running simple test in 6 node cassandra 4 GB heap, 96 GB RAM and > 12 core per host. I am inserting 1M rows with avg col size of 250k. I keep > getting "Dropped mutation" messages in logs. Not sure how to troubleshoot or > tune it. Average col size of 250k - that sounds to me like you'

Re: Lot of pending tasks for writes

2011-04-12 Thread mcasandra
Can someone please help? -- View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Lot-of-pending-tasks-for-writes-tp6263462p6266213.html Sent from the cassandra-u...@incubator.apache.org mailing list archive at Nabble.com.

Lot of pending tasks for writes

2011-04-11 Thread mcasandra
is message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Lot-of-pending-tasks-for-writes-tp6263462p6263462.html Sent from the cassandra-u...@incubator.apache.org mailing list archive at Nabble.com.