On Thu, Jul 10, 2003 at 02:17:41PM -0400, Shah, Vineel wrote: > On my system, I saw a speedup of 10x when I went from an FSDirectory to a > RAMDirectory (loaded the whole index into RAM.) This was also true in terms of > scalability -- .1 searches/sec went to 8 searches/sec under load (10 threads, no > delay between requests.) The index was ~250,000 records in about > 200mb on disk. > > The search was conducted by a JSP through a Lucene 1.3 dev release (I forget which > one) running under Tomcat. RedHat Linux 6.3 on an Intel machine (I didn't know the > mhz, sorry.) > > vineel >
That is another case. The ram directory is MUCH faster than the fs directory because you spare billions of SYSTEM CALLS that are needed when accessing the FS (even if it is buffered and resides in the memory). A system call is very expensive. incze --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
