performance - How to change the size of the off-heap in neo4j? -

does know parameters can affect size of off-heap memory?
in neo4j documentation, said size of off-heap memory can modified dbms.pagecache.memory parameter.
tried changing size of parameter, when check off-heap memory jconsole, size same.
ps: i'm working free version of neo4j.

neo4j <= 2.1.x uses called mmio cache first level cache. uses mapped memory capabilities provided operating system. on unix style oses file buffer cache off heap on windows it's on heap. verbose description including config settings refer http://neo4j.com/docs/2.1.8/configuration-caches.html#_file_buffer_cache.

in neo4j 2.2 cache layer's implementation changed page cache. page cache off heap on oses. it's configuration has been reduced on setting:

dbms.pagecache.memory     

so you've used 2.2 config option on 2.1 instance. either use set of options 2.1 or upgrade.