hi,Erick. thanks at first. I had watched the status of JVM at runtime helped by "jconsole" and "jmap". 1,When the "Xmx" was not assigned, then, the "Old Gen" area was full whose size was up to 1.5Gb and whose major content are instances of "String" , when the whole size of heap was up to the maximum ( about 2GB), the JVM run gc() ,which wasted the CPU time,then, the performance was degraded sharply, which was from 100,000 docs per minute to 10,000 docs per minute, as a examination, i assigned "Xmx=1024m" purposely, the amount was down to 1000 docs per minute. 2,When assigned "Xmx=4096m", i found that the "Old Gen" was up to 2.1 GB and the all size of JVM was up to 3GB, but, the performance with 100,000 docs per minute can attained. During all of the test above, i only adjust the setting of client, which connect to the identical solr server and i empty the "data" directory of solr home before every test. By the way, i know the client code was very ugly occupied so many heap too, but, i wan`t permitted to promote them before i obtain a benchrank using solrj 3.5 as much as which the old version did using solrj 1.4. B.R murphy
On Fri, Apr 6, 2012 at 5:54 AM, Erick Erickson <erickerick...@gmail.com>wrote: > "What's memory"? Really, how are you measuring it? > > If it's virtual, you don't need to worry about it. Is this > causing you a real problem or are you just nervous about > the difference? > > Best > Erick > > On Wed, Apr 4, 2012 at 11:23 PM, a sd <liurx...@gmail.com> wrote: > > hi,all. > > I have write a program which send data to solr using the "update" > > request handler, when i adopted server & client library ( namely solrj ) > > with version 4.0 or 3.2, jvm`s heap size was up to 1.0 G about, but > ,when i > > transfer the all of them to solr 3.5 ( both server and client libs), the > > size of heap was top to 3.0G ! There are the same server configuration > and > > the identical program. What`s wrong with the new version of solrj 3.5 , i > > had looked the source code, there is no difference between solrj 3.2 and > > solrj 3.5 where my program may invoke. How can i do to decrease the > memory > > cost by solrj 3.5? > > Any advice will be appreciated! > > murphy >
