Re: Compaction bringing a node to its knees

2010-06-08 Thread Jonathan Ellis
I'm curious, did this help at all? On Sat, May 29, 2010 at 3:03 PM, Jonathan Ellis wrote: > You could try setting the compaction thread to a lower priority.  You > could add a thread priority to NamedThreadPool, and pass that up from > CompactionExecutor constructor.  According to > http://www.ja

Re: Compaction bringing a node to its knees

2010-05-29 Thread Jonathan Ellis
You could try setting the compaction thread to a lower priority. You could add a thread priority to NamedThreadPool, and pass that up from CompactionExecutor constructor. According to http://www.javamex.com/tutorials/threads/priority_what.shtml you have to run as root and add a JVM option to get

Compaction bringing a node to its knees

2010-05-29 Thread James Golick
I just experienced a compaction that brought a node to 100% of its IO capacity and made its responses incredibly slow. It wasn't enough to make the node actually appear as down, though, so it slowed down the operation of the cluster considerably. The CF being compacted contains a lot of relativel