Someone has just talked about the heap size in this mail list, says that bigger heap size will result into a longer GC phase, that could probably be one of the reason not using larger heap size.
But I have really heard of some others using Cassandra with some 60 gigabytes of heap size. 從我的 BlackBerry® 無線裝置 -----Original Message----- From: Ramesh Natarajan <rames...@gmail.com> Date: Mon, 3 Oct 2011 21:47:08 To: <user@cassandra.apache.org> Reply-To: user@cassandra.apache.org Subject: Cassandra JVM heap size I was reading an article @ http://www.acunu.com/products/choosing-cassandra/and it mentions cassandra cannot benefit from more than 8GB allocated to JVM heap. Is this true? Are these cassandra installations with larger heap sizes? We are planning to have a cluster of 6 nodes with each node running with about 100 GB or so RAM. Will this be a problem? thanks Ramesh from http://www.acunu.com/products/choosing-cassandra/ Memory Ceiling Cassandra typically cannot benefit from more than 8GB of RAM allocated to the Java heap, imposing a hard limit on data size. Taking advantage of big servers with lots of memory or many disks is no problem for Acunu. Thereʼs no memory ceiling for Acunu and as a result, no data ceiling either. Need to use larger servers? Go ahead.
