Hi, I'm running Cassandra with a very small dataset so that the data can exist on memtable only. Below are my configurations:
In jvm.options: -Xms4G -Xmx4G In cassandra.yaml, memtable_cleanup_threshold: 0.50 memtable_allocation_type: heap_buffers As per the documentation in cassandra.yaml, the *memtable_heap_space_in_mb* and *memtable_heap_space_in_mb* will be set of 1/4 of heap size i.e. 1000MB According to the documentation here ( http://docs.datastax.com/en/cassandra/3.0/cassandra/configuration/configCassandra_yaml.html#configCassandra_yaml__memtable_cleanup_threshold), the memtable flush will trigger if the total size of memtabl(s) goes beyond (1000+1000)*0.50=1000MB. Now if I perform several write requests which results in almost ~300MB of the data, memtable still gets flushed since I see sstables being created on file system (Data.db etc.) and I don't understand why. Could anyone explain this behavior and point out if I'm missing something here? Thanks, Preetika
