Re: Creating objects in the database

The objects are created in a single transaction.

-----Original Message-----
From: Klaus Wuestefeld [mailto:[email protected]] 
Sent: Friday, February 06, 2009 11:04 PM
To: Open discussion about the Prevayler project.
Subject: Re: [Prevayler-discussion] Creating objects in the database

Also: Are you creating 20000 objects in a single transaction or in
20000 separate transactions?


On Fri, Feb 6, 2009 at 6:49 PM, Klaus Wuestefeld
<[email protected]> wrote:
> Are you doing SCADA or OLTP?
>
>
> On Fri, Feb 6, 2009 at 3:24 PM, William Pietri <[email protected]>
wrote:
>> Khayundi, Peter wrote:
>>
>> I am doing some timings with the Prevayler database. I inserted 20000
items
>> into the database and timed this operation. The experiment was
repeated 10
>> times. The resulting times differ widely and have a high standard
deviation.
>> Does anybody have an explanation as to why the same experiment should
have
>> such widely different timings?
>>
>>
>>
>> Hi, Peter. My first two guesses: other IO on the same disk and Java
garbage
>> collection. You can reduce problems with the first by using a
separate disk,
>> and with the latter by giving Java lots more RAM than necessary.
There are
>> also assorted tunings you can do, but those depend on OS and JDK
version.
>>
>>
>> William
>>
>> --
>> William Pietri - [email protected] - +1-415-643-1024
>> Agile consulting, coaching, and development: http://www.scissor.com/
>> We'd love feedback on our new blog: http://agilefocus.com/
>>
>>
>>
>>
>>
>>
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>

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