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Posted to user@cassandra.apache.org by Jacob Schneider <ja...@gmx.at> on 2011/11/02 16:59:57 UTC

Java Heap Exc.; Memtable; Right config?

hey,

i have a question and need help...
Description:


I am using cassandra 1.* (3GB ram;4Cors) with 1 node (at first). I am saving different sizes (0.01mb – 600mb) of files and indexes in the db and i want to know whats the best size of a value in a column. If the optimal size is smaller then the filesize, i just split it in more columns.

 Problem:


I writed a test to find this size, but i am getting java heap excp. all the time, if i am writing/reading to much values in a row (without pause).

How i can fix this problem? i allready read (http://wiki.apache.org/cassandra/MemtableThresholds) and also the cassandra – FAQ

And i know there is no streaming L

 

Would help to decrese the flashsize of the memtable? (whould slow the reading right?)

 

Thanks for help or links:D

headgrowe