Thanks. Are you saying that if we run low on memory, the MMapDirectory will stop using it? The least used memory will be removed from the OS automatically? Isee some paging. Wouldn't paging slow down the querying?
My index is 10gb and every 8 hours we get most of it in shared memory. The memory is 99 percent used, and that does not leave any room for other apps. Other implications? Sent from my mobile device 720-256-8076 On Jul 19, 2012, at 9:49 AM, "Uwe Schindler" <u...@thetaphi.de> wrote: > Read this, then you will see that MMapDirectory will use 0% of your Java Heap > space or free system RAM: > > http://blog.thetaphi.de/2012/07/use-lucenes-mmapdirectory-on-64bit.html > > Uwe > > ----- > Uwe Schindler > H.-H.-Meier-Allee 63, D-28213 Bremen > http://www.thetaphi.de > eMail: u...@thetaphi.de > > >> -----Original Message----- >> From: William Bell [mailto:billnb...@gmail.com] >> Sent: Tuesday, July 17, 2012 6:05 AM >> Subject: How to setup SimpleFSDirectoryFactory >> >> We all know that MMapDirectory is fastest. However we cannot always use it >> since you might run out of memory on large indexes right? >> >> Here is how I got iSimpleFSDirectoryFactory to work. Just set - >> Dsolr.directoryFactory=solr.SimpleFSDirectoryFactory. >> >> Your solrconfig.xml: >> >> <directoryFactory name="DirectoryFactory" >> class="${solr.directoryFactory:solr.StandardDirectoryFactory}"/> >> >> You can check it with http://localhost:8983/solr/admin/stats.jsp >> >> Notice that the default for Windows 64bit is MMapDirectory. Else >> NIOFSDirectory except for WIndows.... It would be nicer if we just set it >> all up >> with a helper in solrconfig.xml... >> >> if (Constants.WINDOWS) { >> if (MMapDirectory.UNMAP_SUPPORTED && Constants.JRE_IS_64BIT) >> return new MMapDirectory(path, lockFactory); >> else >> return new SimpleFSDirectory(path, lockFactory); >> } else { >> return new NIOFSDirectory(path, lockFactory); >> } >> } >> >> >> >> -- >> Bill Bell >> billnb...@gmail.com >> cell 720-256-8076 > >
