I use default option for compaction: in_memory_compaction_limit_in_mb: 64 multithreaded_compaction: false compaction_throughput_mb_per_sec: 16 compaction_preheat_key_cache: true
I aborted Cassandra after a timeout query; my Cassandra is 1.2beta-2 I don't what hardware information may help On Mon, Oct 15, 2012 at 11:19 PM, Michael Kjellman <mkjell...@barracuda.com>wrote: > And to clarify my reply, this was a loop in compactions on > system-schema_columns specifically. > > From: Michael Kjellman <mkjell...@barracuda.com> > Reply-To: "user@cassandra.apache.org" <user@cassandra.apache.org> > Date: Monday, October 15, 2012 8:11 AM > To: "user@cassandra.apache.org" <user@cassandra.apache.org> > Subject: Re: Why my Cassandra is compacting like mad > > I had a similar bug with 1.1.5 but I couldn't reproduce it so I didn't > file a bug. I did a rolling restart of my nodes and things went back to > normal. > > From: Manu Zhang <owenzhang1...@gmail.com> > Reply-To: "user@cassandra.apache.org" <user@cassandra.apache.org> > Date: Monday, October 15, 2012 8:02 AM > To: "user@cassandra.apache.org" <user@cassandra.apache.org> > Subject: Why my Cassandra is compacting like mad > > My Cassandra is compacting like mad (look at the following messages) after > I restart it after a timeout query. It won't stop until I kill the process. > > > INFO 22:57:41,839 Compacting > [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1258-Data.db')] > INFO 22:57:42,077 Compacted to > [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db,]. > 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s. > Time: 238ms. > INFO 22:57:42,079 Compacting > [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1259-Data.db')] > INFO 22:57:42,309 Compacted to > [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db,]. > 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.018149MB/s. > Time: 230ms. > INFO 22:57:42,311 Compacting > [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1260-Data.db')] > INFO 22:57:42,574 Compacted to > [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db,]. > 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.015872MB/s. > Time: 263ms. > INFO 22:57:42,576 Compacting > [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1261-Data.db')] > INFO 22:57:42,814 Compacted to > [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db,]. > 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.017539MB/s. > Time: 238ms. > INFO 22:57:42,816 Compacting > [SSTableReader(path='/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1262-Data.db')] > INFO 22:57:43,070 Compacted to > [/home/manuzhang/cassandra/data/system/schema_columns/system-schema_columns-ia-1263-Data.db,]. > 4,377 to 4,377 (~100% of original) bytes for 3 keys at 0.016434MB/s. > Time: 254ms. > > ---------------------------------- > 'Like' us on Facebook for exclusive content and other resources on all > Barracuda Networks solutions. > Visit http://barracudanetworks.com/facebook > > > ---------------------------------- > 'Like' us on Facebook for exclusive content and other resources on all > Barracuda Networks solutions. > Visit http://barracudanetworks.com/facebook > >
