I'm pretty sure not. The words "virtual memory address space" is important here, that's not physical memory...
Best Erick On Mon, Nov 14, 2011 at 11:55 AM, Yongtao Liu <y...@commvault.com> wrote: > Hi all, > > I saw one issue is ram usage keep increase when we run query. > After look in the code, looks like Lucene use MMapDirectory to map index file > to ram. > > According to > http://lucene.apache.org/java/3_1_0/api/core/org/apache/lucene/store/MMapDirectory.html > comments, it will use lot of memory. > NOTE: memory mapping uses up a portion of the virtual memory address space in > your process equal to the size of the file being mapped. Before using this > class, be sure your have plenty of virtual address space, e.g. by using a 64 > bit JRE, or a 32 bit JRE with indexes that are guaranteed to fit within the > address space. > > So, my understanding is solr request physical RAM >= index file size, is it > right? > > Yongtao > > > ******************Legal Disclaimer*************************** > "This communication may contain confidential and privileged > material for the sole use of the intended recipient. Any > unauthorized review, use or distribution by others is strictly > prohibited. If you have received the message in error, please > advise the sender by reply email and delete the message. Thank > you." > *********************************************************
