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From Michael Kjellman <mkjell...@barracuda.com>
Subject Re: Why my Cassandra is compacting like mad
Date Mon, 15 Oct 2012 15:11:14 GMT
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 <owenzhang1990@gmail.com<mailto:owenzhang1990@gmail.com>>
Reply-To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <user@cassandra.apache.org<mailto:user@cassandra.apache.org>>
Date: Monday, October 15, 2012 8:02 AM
To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" <user@cassandra.apache.org<mailto: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.

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