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From Charles Hsiao <chs...@mrxsolutions.com>
Subject Re: Perfomance Inserting and Removing Documents
Date Fri, 21 Nov 2003 00:24:56 GMT
3.3 % of 512M is only about 15MB of memory.

With options -Xms200m -Xmx300m, you should see Xindice using at least 
200M of memory space.


On Thursday, November 20, 2003, at 04:21  PM, Charles Hsiao wrote:

> Have you looked the GC output during the test?
>
>
> On Thursday, November 20, 2003, at 03:46  PM, Jill Rhoads wrote:
>
>> Ok, I chose a slightly larger file (15k) and inserted it into Xindice 
>> 500
>> times.  (Remember I have a 2.7 Ghz Celeron and 512 Meg RAM.) Here's my
>> results:
>>
>> 1st trial:
>> Elapsed time (InsertDocument): 45.3489589691
>> Elapsed time (RemoveDocument): 7.29849600792
>>
>> 2nd trial:
>> Elapsed time (InsertDocument): 45.0858030319
>> Elapsed time (RemoveDocument): 6.85884797573
>>
>> I did notice that Java only utilized at max 38% of my CPU at any time 
>> and
>> 3.3% of my memory (512 MB).  So I started playing with Java's options 
>> and
>> here are my results with the following JAVA_OPT's set.
>>
>> -Xms100m -Xmx150m
>> Elapsed time (InsertDocument): 34.5685210228
>> Elapsed time (RemoveDocument): 8.1172440052
>>
>> -Xms200m -Xmx300m
>> Elapsed time (InsertDocument): 35.4143769741
>> Elapsed time (RemoveDocument): 8.80774796009
>>
>> -Xms200m -Xmx300m -XX:MinHeapFreeRatio=90 -XX:MinHeapFreeRatio=20
>> Elapsed time (InsertDocument): 36.0503109694
>> Elapsed time (RemoveDocument): 8.67905592918
>>
>> -Xmx500m -Xms500m
>> Elapsed time (InsertDocument): 34.4147530794
>> Elapsed time (RemoveDocument): 7.81289899349
>>
>> Not much of an improvment.  BUT it does look scarily close to what 
>> you got
>> with the smaller file which can mean that the java vm isnt' using my
>> machine any better than yours.  There should be a way to get java even
>> more streamlined, but I'm no expert at that.  Perhaps someone else has
>> some experience at optimizing the java VM.  Anyone?  I would be really
>> interested in learning how to this this myself.
>>
>> /Jill
>>
>> Don Stocks said:
>>> He he.  I'm hardly in any position to laugh.  Your box is running 8X
>> faster than my old brick! ;)
>>>
>>> I've attached a copy of the document I did my test with.  I just put 
>>> the
>> contents of this file into a variable and insert it into the database 
>> with
>>> an incrementing name (i.e. insertTest0 - insertTest499) inside a for
>> loop.
>>>  Then I did a listDocuments call and looped through the array 
>>> deleteing
>>> the documents. I timed  both loops.  My initial test was with a 
>>> document
>> about 1K in size and the inserts were taking 90 - 100 seconds.
>>>
>>> Thanks for taking a peek at it.  I'm curios to see how much of an 
>>> impact
>> the fast CPU has on performance.
>>>
>>>  - Don
>>>
>>> Jill Rhoads <jill@rhoads.nu> wrote:
>>> Can you lend out those XML files? I can test to see if the 
>>> performance
>> issues can be solved by a better processor. I have a 2.7 Celeron 
>> (don't
>> laugh) with 512 meg of DDR.
>>>
>>> Here's where my work is with the php browser, if you're interested.
>> http://www.rhoads.nu:8080/~jrhoads/2D1517/project/xindice_browser.php
>>>
>>> As you can see from the bottom of the page, I am making sure 
>>> performance
>> statistics are going to be provided.
>>>
>>> /Jill
>>>
>>> Don Stocks said:
>>>> I'm curious to know what type of performance I can expect from 
>>>> Xindice
>> when inserting and deleting documents. I am planning an application 
>> that
>>>> will be managing a lot of very small documents; perhaps several
>> thousand
>>>> a
>>>> minute. So I did some tests. I'm using PHP to communincate with 
>>>> Xindice
>> running on the localhost via XML-RPC. Here's what I found.
>>>> Inserting 500 476 byte documents: 47 seconds
>>>> Deleting 500 476 byte documents: 31 seconds
>>>> Unfortunately this is far too slow. I am running this test on my old
>> junker 333Mhz laptop w/ 128MB RAM. But inserting 500 rows with the 
>> same
>> data into PostgreSQL on the same system only takes a couple of 
>> seconds.
>> I'm just looking for hits or tips to improve performance. I also want 
>> to
>>>> validate Xindice as an appropriate choice for my data store. The 
>>>> native
>> XML storage is really what I need.
>>>> Thanks, Don
>>>> ---------------------------------
>>>> Do you Yahoo!?
>>>> Protect your identity with Yahoo! Mail AddressGuard
>>>
>>>
>>>
>>> ---------------------------------
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>>
>>
>>
>>
>>
>>
> Charles Hsiao
>
> MRX Solutions Corp.
> Smart Practice, Smart Solutions
>
> http://www.mrxsolutions.com
>
>
>
Charles Hsiao

MRX Solutions Corp.
Smart Practice, Smart Solutions

http://www.mrxsolutions.com



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