incubator-cassandra-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Roshan <codeva...@gmail.com>
Subject Cassandra 1.0.6 data flush query
Date Fri, 22 Jun 2012 03:58:55 GMT
Hi

I am using Cassandra 1.0.6 version in our production system and noticed that
Cassandra flushing the data to SSTable and the file size is < 10MB. With
under moderate write load, the Cassandra flushing lots of memtables with
small sizes. With this compaction doing lots of compactions.

O/S - Centos 64bit Sun Java 1.6_31
VM size - 2.4GB

Following parameters change on cassandra.yaml file.

flush_largest_memtables_at: 0.45 (reduce it from .75)
reduce_cache_sizes_at: 0.55 (reduce it from .85)
reduce_cache_capacity_to: 0.3 (reduce it from .6)
concurrent_compactors: 1
memtable_total_space_in_mb: 200 
in_memory_compaction_limit_in_mb: 16 (from 64MB)
Key cache = 10000
Row cache = 0
Could someone please help me on this.

Thanks
/Roshan
  

--
View this message in context: http://cassandra-user-incubator-apache-org.3065146.n2.nabble.com/Cassandra-1-0-6-data-flush-query-tp7580733.html
Sent from the cassandra-user@incubator.apache.org mailing list archive at Nabble.com.

Mime
View raw message