14 aug 2007 kl. 00.17 skrev lucene user:
What if my concern is more in terms of having a large number of
requests per
second? When should I start to be worried and start thinking about
more than
low end hardware?
I have served one request every 10th millisecond, 24/7 on a single
machine
with a corpus similar to yours using Lucene, Solaris, dual core and
8GB RAM.
If you follow the recommendations available on the Wiki you do not
need to
worry about Lucene. You might need to consider tweaking your JVM with
some
memory related parameters though. Heap per thread, et c.
http://wiki.apache.org/lucene-java/BasicsOfPerformance
--
karl
Thanks!
On 8/12/07, karl wettin <[EMAIL PROTECTED]> wrote:
12 aug 2007 kl. 14.01 skrev lucene user:
Do you know if 290k articles and 234 million words is a large
lucene index
or a medium one? Do people build them this big all the time?
If the calculator in my head works you have 300k documents at 4k text
each.
I say your corpus is borderline small.
--
karl
Thanks!
On 8/12/07, karl wettin <[EMAIL PROTECTED]> wrote:
12 aug 2007 kl. 09.03 skrev lucene user:
If I have an index with 111k articles and 90 million words
indexed,
how much
RAM should I have to get really fast access speeds?
If I have an index with 290k articles and 234 million words
indexed, how
much RAM should I have to get really fast access speeds?
Define really fast.
I say you need 1.3x as much RAM as the size of your FSDirectory to
ensure that the file system cache is never flushed out. But it also
depends on user load. Each thread consumes RAM and CPU.
In order to really find out, setup the benchmarker to run on your
index, and limit the amount of memory your file system chache
and JVM
is allowed.
Any other advice about sizing a server?
What other info do you need to have to help size the server?
Sizing?
Does it matter if the server has a 64 bit processor?
In a 64 bit environment a reference to an instance consumes
twice as
much RAM as in a 32 bit environment. It should not affect a file
centric Lucene store (Directory), Your OS and your application that
use Lucene might be consuming some more resources though. Again,
benchmark.
Speed of processor important?
Yes.
Speed of disks?
May or may not be intersting depending on how much RAM you have.
--
karl
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