Re: high pending compactions

2014-07-15 Thread Chris Lohfink
:49 AM, S C wrote: > > Thank you all for valuable suggestions. Couple more questions, > > How to check the compaction queue? MBean/C* system log ? > What happens if the queue is full? > > From: colinkuo...@gmail.com > Date: Mon, 9 Jun 2014 18:53:41

Re: high pending compactions

2014-07-14 Thread Greg Bone
2:14 PM, S C wrote: > Thank you all for quick responses. > -- > From: clohf...@blackbirdit.com > Subject: Re: high pending compactions > Date: Mon, 9 Jun 2014 14:11:36 -0500 > To: user@cassandra.apache.org > > Bean: org.apache.cassandra.db.Compac

RE: high pending compactions

2014-06-09 Thread S C
Thank you all for quick responses. From: clohf...@blackbirdit.com Subject: Re: high pending compactions Date: Mon, 9 Jun 2014 14:11:36 -0500 To: user@cassandra.apache.org Bean: org.apache.cassandra.db.CompactionManager also nodetool compactionstats gives you how many are in the queue + estimate

Re: high pending compactions

2014-06-09 Thread Chris Lohfink
il.com > Date: Mon, 9 Jun 2014 18:53:41 +0800 > Subject: Re: high pending compactions > To: user@cassandra.apache.org > > As Jake suggested, you could firstly increase > "compaction_throughput_mb_per_sec" and "concurrent_compactions" to suitable > values

RE: high pending compactions

2014-06-09 Thread S C
Thank you all for valuable suggestions. Couple more questions, How to check the compaction queue? MBean/C* system log ?What happens if the queue is full? From: colinkuo...@gmail.com Date: Mon, 9 Jun 2014 18:53:41 +0800 Subject: Re: high pending compactions To: user@cassandra.apache.org As Jake

Re: high pending compactions

2014-06-09 Thread Colin Kuo
As Jake suggested, you could firstly increase "compaction_throughput_mb_per_sec" and "concurrent_compactions" to suitable values if system resource is allowed. From my understanding, major compaction will internally acquire lock before running compaction. In your case, there might be a major compac

RE: high pending compactions

2014-06-08 Thread S C
How to check if there are any "stuck compactions"? > Date: Sun, 8 Jun 2014 12:43:45 -0400 > From: wkat...@cs.rutgers.edu > To: user@cassandra.apache.org > Subject: Re: high pending compactions > > Have you verified that these aren't "stuck compactions"

Re: high pending compactions

2014-06-08 Thread William Katsak
Have you verified that these aren't "stuck compactions"? e.g. even under no load, they don't go away? -Bill On 06/08/2014 12:32 PM, Jake Luciani wrote: 2&3 On Sunday, June 8, 2014, S C mailto:as...@outlook.com>> wrote: I am using Cassandra 1.1 (sorry bit old) and I am seeing high pe

Re: high pending compactions

2014-06-08 Thread Jake Luciani
2&3 On Sunday, June 8, 2014, S C wrote: > I am using Cassandra 1.1 (sorry bit old) and I am seeing high pending > compaction count. "pending tasks: 67" while active compaction tasks are > not more than 5. I have a 24CPU machine. Shouldn't I be seeing more > compactions? Is this a pattern of high