Re: High CPU usage during repair

2013-02-11 Thread aaron morton
What machine size? m1.large If you are seeing high CPU move to an m1.xlarge, that's the sweet spot. That's normally ok. How many are waiting? I have seen 4 this morning That's not really abnormal. The pending task count goes when when a file *may* be eligible for compaction, not when

Re: High CPU usage during repair

2013-02-11 Thread Tamar Fraenkel
Thank you very much! Due to monetary limitations I will keep the m1.large for now, but try the throughput modification. Tamar *Tamar Fraenkel * Senior Software Engineer, TOK Media [image: Inline image 1] ta...@tok-media.com Tel: +972 2 6409736 Mob: +972 54 8356490 Fax: +972 2 5612956

High CPU usage during repair

2013-02-10 Thread Tamar Fraenkel
Hi! I run repair weekly, using a scheduled cron job. During repair I see high CPU consumption, and messages in the log file INFO [ScheduledTasks:1] 2013-02-10 11:48:06,396 GCInspector.java (line 122) GC for ParNew: 208 ms for 1 collections, 1704786200 used; max is 3894411264 From time to time,

Re: High CPU usage during repair

2013-02-10 Thread aaron morton
During repair I see high CPU consumption, Repair reads the data and computes a hash, this is a CPU intensive operation. Is the CPU over loaded or is just under load? I run Cassandra version 1.0.11, on 3 node setup on EC2 instances. What machine size? there are compactions waiting. That's

Re: High CPU usage during repair

2013-02-10 Thread Tamar Fraenkel
Hi! Thanks for the response. See my answers and questions below. Thanks! Tamar *Tamar Fraenkel * Senior Software Engineer, TOK Media [image: Inline image 1] ta...@tok-media.com Tel: +972 2 6409736 Mob: +972 54 8356490 Fax: +972 2 5612956 On Sun, Feb 10, 2013 at 10:04 PM, aaron morton