From derby-user-return-14089-apmail-db-derby-user-archive=db.apache.org@db.apache.org Sun Dec 18 19:37:13 2011 Return-Path: X-Original-To: apmail-db-derby-user-archive@www.apache.org Delivered-To: apmail-db-derby-user-archive@www.apache.org Received: from mail.apache.org (hermes.apache.org [140.211.11.3]) by minotaur.apache.org (Postfix) with SMTP id C4ADE98E9 for ; Sun, 18 Dec 2011 19:37:13 +0000 (UTC) Received: (qmail 4301 invoked by uid 500); 18 Dec 2011 19:37:13 -0000 Delivered-To: apmail-db-derby-user-archive@db.apache.org Received: (qmail 4260 invoked by uid 500); 18 Dec 2011 19:37:13 -0000 Mailing-List: contact derby-user-help@db.apache.org; run by ezmlm Precedence: bulk list-help: list-unsubscribe: List-Post: List-Id: Reply-To: "Derby Discussion" Delivered-To: mailing list derby-user@db.apache.org Received: (qmail 4253 invoked by uid 99); 18 Dec 2011 19:37:13 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 18 Dec 2011 19:37:13 +0000 X-ASF-Spam-Status: No, hits=2.2 required=5.0 tests=HTML_MESSAGE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: local policy) Received: from [148.87.113.117] (HELO rcsinet15.oracle.com) (148.87.113.117) by apache.org (qpsmtpd/0.29) with ESMTP; Sun, 18 Dec 2011 19:37:03 +0000 Received: from ucsinet21.oracle.com (ucsinet21.oracle.com [156.151.31.93]) by rcsinet15.oracle.com (Switch-3.4.4/Switch-3.4.4) with ESMTP id pBIJagZc021886 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Sun, 18 Dec 2011 19:36:42 GMT Received: from acsmt357.oracle.com (acsmt357.oracle.com [141.146.40.157]) by ucsinet21.oracle.com (8.14.4+Sun/8.14.4) with ESMTP id pBIJafWH025232 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Sun, 18 Dec 2011 19:36:42 GMT Received: from abhmt118.oracle.com (abhmt118.oracle.com [141.146.116.70]) by acsmt357.oracle.com (8.12.11.20060308/8.12.11) with ESMTP id pBIJafqv011464 for ; Sun, 18 Dec 2011 13:36:41 -0600 Received: from [192.168.0.199] (/84.215.180.161) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Sun, 18 Dec 2011 11:36:41 -0800 Message-ID: <4EEE4075.5080104@oracle.com> Date: Sun, 18 Dec 2011 20:35:17 +0100 From: Kristian Waagan User-Agent: Mozilla/5.0 (X11; SunOS i86pc; rv:6.0.2) Gecko/20111003 Thunderbird/6.0.2 MIME-Version: 1.0 To: derby-user@db.apache.org Subject: Re: [Unloading class org.apache.derby.exe.acf81e0010x0134x5183xd9d0x00001de8a8587] References: <61D0213B7E5F7B4EBBF5F8D74D43F248025AE68A@bdc.almusbah.com> In-Reply-To: <61D0213B7E5F7B4EBBF5F8D74D43F248025AE68A@bdc.almusbah.com> Content-Type: multipart/alternative; boundary="------------050605070507030709070105" X-Source-IP: ucsinet21.oracle.com [156.151.31.93] X-CT-RefId: str=0001.0A090209.4EEE40CB.0010,ss=1,re=0.000,fgs=0 This is a multi-part message in MIME format. --------------050605070507030709070105 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit On 12/18/11 03:18 PM, Sameer Alwosaby wrote: > > Dear > > When My application save records in java db , I received this > > [Unloading class > org.apache.derby.exe.acf81e0010x0134x5183xd9d0x00001de8a8587] > [ snip - more unloading messages ] > [Unloading class > org.apache.derby.exe.acf81e0010x0134x5183xd9d0x00001de8a85856] > > Please What is the problem ? and what is solution ? > Hi Sameer, I don't think this is a problem in itself. The messages above look like JVM debug messages to me. Derby compiles SQL queries into Java byte code, and this code is written to classes with names like above. Note that you should be using prepared statements where possible, otherwise Derby may be generating more Java classes than necessary (hurting performance). Hope this helps, -- Kristian > Thanks > --------------050605070507030709070105 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit On 12/18/11 03:18 PM, Sameer Alwosaby wrote:

Dear

When My application  save records in java db ,  I received this

 

 

[Unloading class org.apache.derby.exe.acf81e0010x0134x5183xd9d0x00001de8a8587]

[ snip - more unloading messages ]

[Unloading class org.apache.derby.exe.acf81e0010x0134x5183xd9d0x00001de8a85856]

 

 

Please What is the problem ? and what is solution ?


Hi Sameer,

I don't think this is a problem in itself. The messages above look like JVM debug messages to me.

Derby compiles SQL queries into Java byte code, and this code is written to classes with names like above.
Note that you should be using prepared statements where possible, otherwise Derby may be generating more Java classes than necessary (hurting performance).


Hope this helps,
--
Kristian

Thanks

 


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