Performance hint: oracle's JDBC is full of trace(), OracleLog.print()

When someone writes OracleLog.print("some stuff"+variable+"other stuff") or print(...), And even if the log mode is false, the VM would compute "the some tuff"+variable+"other stuff" before calling print() or trace().
So like this :
public synchronized Connection getConnection(String s, String s1)
throws SQLException
makeURL();
trace("User us " + s + "URL is " + m_url);
Connection connection = DriverManager.getConnection(m_url, s, s1);
return connection;
So I noticed that the oracle's JDBC code has many of these (I decompiled it:) even though most of the traces are between "if(OracleLog.TRACE)" which is fine.
So you imagine that for a heavy OLTP application, oppening and closing connections very often (even with the cached data source, there are a lot of trace() without the "if(log)") leads to calling trace() often, without useless computing...
Riad

Similar Messages

Horrible performance with Oracle JDBC

Hi All,
I've been running into a problem with Oracle's JDBC driver it looks like. Queries are taking about 1 - 2 seconds to run, when they should take around 100 ms or less. Even "select sysdate from dual" takes 1.5 seconds or so.
I am using connection pooling (Both C3P0 and Apache DBCP seem to yield about the same results). I have tried a few different Oracle drivers (the 10g ones seem to be the fastest). I'm using the Thin Client.
I'm pretty much out of ideas at this point, and was wondering if anyone else had run into similar problems and could offer any advice.
Thanks.

Is this a general error?Do you experience this problem in a specific workstation or generally?Do you have a quick response using sqlplus? Have you checked that the delay is during query execution?There may be a chance that you don't get immediately a connection from the pool.

How to improve performance of Oracle Forms Server ?

Recently we converted our Application which was Developed in Forms 5.0 and Reports 3.0 into Forms6i to host that on to Web. We also loaded ORACLE 9iAS (on Windows NT 4 with service pack 3) from "Enterprise Edition" option by selecting Oracle Database Cache, Forms Server and Reports Server, HTTP Server(on port 80),Oracle Web Cache. Everything loaded succesfully including Caches.
Forms server is working perfectly and we were able to run our Application in Browser, but performance is the issue. We thought the caches will improve the performance, but it seems they are not at all working. When we run a report or form the Database cache is not giving any statistics whether a particular Query is a Hit or Miss though the cache is running. We got a doubt and searched in FAQ's and we found the following questions.
Oracle9iAS Web Cache Frequently Asked
Questions February 2001
Does Oracle9iAS Web Cache work with applications that use Oracle9iAS Forms?
Not in the 1.x release of Oracle9iAS. Integration between Oracle9iAS Web Cache and Oracle9iAS Forms will be addressed at a future date.
Oracle9iAS Database Cache
Does the Cache work with Oracle Forms and Portal in Oracle9i AS?
Since Oracle Forms and Portal utilize read/write PL/SQL stored procedures, these components cannot take advantage of the Cache. This support is being considered for a future version.
After coming to know that Caches doesnot boost the performance of Oracle Forms and reports. We have the following queries.
1) Clarify whether the above are True.
2) Apart from DB and Web Cache is there any other way where in we can improve the performance of Oracle Forms and Reports in Forms Server including the start up time.
3) What is the ideal configuration required for each tier (iAS Server,Database Server and Client) to host Forms on to Web considering our application as Medium scale.
(Presently our configuration are,
Application Server Configuration : Windows NT 4 with service pack 3,256 MB RAM,1 GB Virtual memory and 4GB free space and almost the same configuration is being used for
Database Configuration.
Client Configuration : Windows 98 with 64MB RAM).
4) Is there any way to track the performance and know the problem areas like TRACE.
Gopi Kumar
null

A couple of questions for you:
1) What version of IAS are you using?
2) What's the version of Forms&Reports and
3) What version of patch are you using if any
for forms&Reports?
4) What applications are you running on the
machine where Forms&Reports is installed?
(I mean non-Oracle applications?)
The problem could be that, the base addresses
of the DLL's in Forms&Reports could be having base address conflicts with some other application's DLL's.
Forms and Reports needs to be fully rebased to achieve full performance on NT. Before release of Forms and Reports, Oracle rebases all DLLs. Rebasing assigns unique base addresses to all of the DLL's in use by an executable. A properly based DLL will load at its preferred base address, greatly improving the efficiency of memory utilization and the runtime performance of the executable.
Multiple utilities are available on NT to verify proper rebasing of DLLs. HandleEx v4.0 is one such freeware from Sysinternals and is available at www.sysinternals.com. Some others are "depends.exe" that's part of the MS Visual Studio or msinfo32.exe that comes with Office 2000 on NT.
If after running any of these utilities you discover that the DLL's ar not properly rebased, you need to contact Oracle worldwide support.
If you find that rebasing is not the problem, then please post your feedback again. Hope this helps.

Oracle 8i jdbc/Tomcat connection issues

Tomcat 4.1.8
Oracle 8i JDBC Driver
I have been able to create the DataSource as a global resource and as a local resource inside the context of the application.
The code hangs when it attempts to create a connection. I have been able to connect to the database and perform the necessary query in a standalone application to ensure that I actually can connect.
JSP Code:
<html>
<head>
<title>VTW App</title>
</head>
<body>
<%
vtw.VTWApp tst = new vtw.VTWApp();
tst.init();
%>
<h2>Results</h2>
<%= tst.getList() %>
</body>
</html>
Java Code (Class called by JSP):
package vtw;
import javax.naming.*;
import javax.sql.*;
import java.sql.*;
public class VTWApp {
String list = "EMPTY";
public void init() {
try{
Context ctx = new InitialContext();
if(ctx == null )
throw new Exception("Boom - No Context");
System.out.println("Context Created ...");
DataSource ds =
(DataSource)ctx.lookup(
"java:comp/env/jdbc/oracleDB");
if (ds != null) {
          System.out.println("DataSource Created ...");
Connection conn = ds.getConnection();
System.out.println("Connection Pulled");
if(conn != null) {
               System.out.println("Connection Good");
               Statement st = conn.createStatement();
               String query = "";
               query += "select grpid, to_char(min(dtlastendtime),'mm-dd-yyyy hh24:mi:ss') ";
               query += "from calc_table where equipmentsernum in (";
               query += "'888000','888001'";
               query += ") group by grpid";
               ResultSet rs = st.executeQuery(query);
               if(rs != null) {
                    list = "";
                    while(rs.next()) {
                         list += (rs.getString(1) + "," + rs.getString(2));
               rs.close();
               conn.close();
               System.out.println("Connection Closed");
          } else {
               System.out.println("Connection Not Established");
}catch(Exception e) {
e.printStackTrace();
public String getList() { return list; }
}

I figured out the issue ...
In the server.xml file the resource & resource params needed to be modified..
1. Set type to oracle.jdbc.pool.OracleDataSource
2. Set factory to oracle.jdbc.pool.OracleDataSourceFactory
3. In the Java code cast the context lookup to an OracleDataSource instead of a java.sql.DataSource
Oracles DataSource does not subclass the jdbc DataSource for its OracleDataSource class everything works fine now.
<Resource name="jdbc/mydb" scope="Shareable" type="oracle.jdbc.pool.OracleDataSource"/>
<ResourceParams name="jdbc/mydb">
<parameter>
<name>validationQuery</name>
<value></value>
</parameter>
               <parameter>
                    <name>factory</name>
                    <value>oracle.jdbc.pool.OracleDataSourceFactory</value>
               </parameter>
<parameter>
<name>driverClassName</name>
<value>oracle.jdbc.driver.OracleDriver</value>
</parameter>
<parameter>
     <name>url</name>
     <value>jdbc:oracle:thin:@server.company.com:1521:dbname</value>
</parameter>
<parameter>
<name>password</name>
<value>guest</value>
</parameter>
               <parameter>
                    <name>maxWait</name>
                    <value>10000</value>
               </parameter>
               <parameter>
                    <name>maxActive</name>
                    <value>100</value>
               </parameter>
<parameter>
<name>user</name>
<value>guest</value>
</parameter>
<parameter>
<name>maxIdle</name>
<value>2</value>
</parameter>
</ResourceParams>

Getting started with oracle and jdbc

i have downloaded ojdbc14.zip from oracle.com
it's documentation only tells you about the api and the packages and nothing about how to configure it.
how do i get started? where do i unzip those files and what to do next?
please help

"The Old oracle.jdbc.driver Package Will Go Away Soon
If you still have existing applications that use the
old oracle.jdbc.driver
package, now is the time to convert your code."
And who is so foolish as to use concrete types
instead of java.sql and javax.sql interfaces or embed
driver class names in their code? Well, anybody who's more interested in optimal performance than being generic, and willing to put up with the headaches of that, such as providers of high-performance OR mapping tools or someone tuning a very heavily used bit. Or anybody working in a committed Oracle-only shop. It's not a one-size-fits-all world...
Again, Oracle is evolving the standard. No, the standard is Sun's java.sql interface.Yea, Sun evolved Java, and Oracle is recommending the use of Datasources to keep step with that evolution...
This still
works, but Oracle is shifting away from <sid> and
using <service name> instead. The alternate syntax
for the URL is:
String url=jdbc:oracle:thin:@<host>:<port>/<database>
This has been true for as long as Oracle has had a
thin, type IV JDBC driver. The URL syntax hasn't
changed.
Yes it has and Oracle says it has, here:
http://download-west.oracle.com/docs/cd/B14117_01/java.101/b10979/urls.htm#BEIJFHHB
Wherein it is written, in Section 3.2.1 of the Oracle� Database JDBC Developer's Guide and Reference, the sesction on the several supported URL formats for Oracle 10.1
Notes:
* Oracle Service IDs are no longer supported at 10g Release 1 (10.1).
They go on to list three URL styles supported:
Oracle Net connection descriptor - like an entry in tnsnames.ora (ick!)
Thin-style service name - the most common, what was quoted above.
LDAP syntax - for having an LDAP service resolve the database for you
However, in the old 8.1.7 JDBC documentation, here:
http://download-east.oracle.com/docs/cd/A87860_01/doc/java.817/a83724/basic1.htm#1006213
Oracle lists support for:
Net8 connection descriptor - Net8 is the old name for Oracle Net
Thin-style sid name - what was quoted in the post to which I first responded.
Thin-style sid name syntax has a colon between the port and the sid; thin-style service name syntax has a forward slash between the port and the service name. SIDs and service names are not the same thing, although they serve the same purpose in a URL (connecting you to the right instance) and often have the same value. However, a SID for a database is set at DB creation time, is unique to the DB, and cannot be changed easily. Multiple service names can be configured for a database, and they can easily be changed (if you're the DBA). Oracle is providing an additional leval of abstraction by moving to service names, to support additional features and choices. While many installations don't need all that and have in essence ignored the distinction bewteen SID and service name, some multi-database projects can benefit from it.
>
StuDerby, I think you should look into this a bit
more. Your advice is far from optimal, IMO.
Yeah, I could've taken the time to write a more generic, newbie friendly repsonse; instead, I lifted directly from the Oracle documentation that was cited earlier since newbies seem to have an aversion to reading documentation.

Oracle 7 JDBC driver

Hi,
I want to connect to an Oracle 7 database over JDBC. When I go to the download page, it only gives me Oracle 8 and higher download options, even though the documentation index lists an Oracle7 driver.
Does anyone know where I can get it from?
Regards,
Kelsey Grant

Jin Yu (guest) wrote:
: Is there a column limitation in Oracle 7 JDBC drivers ? We are
: not able to retrieve more than 11 columns in a SELECT
statement.
: Could someone get back to us on this ?
: Thanking you in advance
: Jin Yu
Hi!
I tried to use the JDBC driver to connect to Oracle 7. But had
some trouble with it.
Could you give me some hints on how to load the driver, set up
the url for database, etc?
By the way, we use JBuilder.
Thanks.
null

Using Hints Oracle

Hi All,
I have a statement which selects from WB2_V_MKPF_MSEG2
SELECT
MBLNR MJAHR ZEILE_I BWART_I MATNR_I WERKS_I LGORT_I CHARG_I SHKZG_I MENGE_I MEINS_I UMMAT_I UMWRK_I UMLGO_I UMCHA_I
FROM WB2_V_MKPF_MSEG2 INTO TABLE ITAB_MSEG
FOR ALL ENTRIES IN ITAB_BATCH WHERE
      MATNR_I = ITAB_BATCH-MATNR AND WERKS_I = STRC_T001L-WERKS AND LGORT_I IN S_LGORT1 AND
      BWART_I IN ('311', '312') AND CHARG_I = ITAB_BATCH-CHARG AND BUDAT IN R_BUDAT %_HINTS ORACLE
      '&SUBSTITUTE VALUES&' ORACLE '&max_blocking_factor 20&'.
When I observed the trace, I found 2 different execution plans (I had executed the report multiple times)
First -
1. Index Range Scan MKPF~BUD
2. Table Access by Index Rowid MKPF
3. Index Range Scan MSEG~0
4. Table Access by Index Rowid MSEG
Second -
1. Index Range Scan MSEG~M
Index M contains the following fields - MATNR, WERKS, LGORT, BWART, SOBKZ, CHARG
2.Table Access by Index Rowid MSEG
3. Index Range Scan MKPF~BUD
4. Table Access by Index Rowid MKPF
The report running with second execution plan takes less time when compared to first. Though Optimizer is selecting a execution plan which goes through Index in both cases it is unable to select the Best Optimal Plan in all the cases ie Second.
I tried to use Hints,
ORACLE 'INDEX("MSEG" "MSEG~M" "MSEG^M")'
but the optimizer is not considering, still I get the First Execution Plan.
I could observe that Hints are working when I use a single table ie either MKPF or MSEG. But when I use View it is not working.
Is it possible to influence Optimizer to consider first MSEGM and then MKPFBUD using Hints
Can any one help me on this.
Regards,
Vipin.

Hi,
> Can you tell the Syntax for LEADING Hint and USE_NL Hint to influence the order of Selection ie first MSEGM and then MKPFBUD.
sure, this hint:
%_HINTS ORACLE 'LEADING(T2)'
         ORACLE 'USE_NL(T1)'.
will start with MSEG - T2 (alias from view) and use nested loop to access MKPF - T1 (alias from view)
> And I have one more doubt, when I am going through Oracle Performance Tuning Guide 10g for hints, I found this
>
>
> Oracle does not encourage the use of hints inside or on views (or subqueries). This
> is because you can define views in one context and use them in another. Also, such
> hints can result in unexpected execution plans. In particular, hints inside views or
> on views are handled differently, depending on whether the view is mergeable into
> the top-level query.
>
>
> Can you please give me your advice on this.
hm i think this means that you should not hint IN the view itself because it may be used
from many different call positions.
you didn't hint in the view, you hinted your query that access the view.
Another query without hint may use a different execution plan.
Kind regards,
Hermann

Oracle 8i JDBC to connect to 9i DB?

We are having a big Java application that uses Oracle8i as underlying DB. It uses Oracle 8i JDBC for that. Now, we have to extend this application with a module that writes certain things into another DB. However, this DB is on Oracle 9i.
Q: Can we access a 9i DB using the 8i JDBC driver? If yes, is there a special configuration for the JDBC or the 9i DB?
Note: switching the 9i to "8i compatibility mode" is not an option, since we use loads of 9i features in that DB from another application that uses the 9i JDBC driver!
We tried it and we got loads of exceptions from the 8i JDBC driver.
Any comment or hint is more than welcome - we are running out of time...

Hi
I am trying exactly the same thing and am not able to use Oracle8i JDBC for Oracle9i DB. Have u been able to do this? In case yes, please tell me how.
Thanks
Ashish

Error while creating a report that uses Oracle OCI JDBC connectivity

Please let me know why my CR and LF characters are removed from my forum posting *****
Hi,
I was trying to create a report that uses Oracle OCI JDBC connectivity. I am using Eclipse3.4 download from "cr4e-all-in-one-win_2.0.2.zip". I have successfully created a JDBC OCI connection.
The connection parameters are given below:
URL: jdbc:oracle:oci8:@xe
Database: xe
username: <userName>
password: <password>
I have tested the above connection in Data source Explorer and it works fine!!!
But I am getting the following error when I drag-and-drop a table from the list of tables. Not sure what I am missing here? Any help is highly appreciated.
com.businessobjects.reports.jdbinterface.common.DBException: InvalidURLOrClassName
     at com.crystaldecisions.reports.queryengine.driverImpl.jdbc.JDBCConnection.Open(Unknown Source)
     at com.crystaldecisions.reports.queryengine.JDBConnectionWrapper.Open(SourceFile:123)
     at com.crystaldecisions.reports.queryengine.Connection.br(SourceFile:1771)
     at com.crystaldecisions.reports.queryengine.Connection.bs(SourceFile:491)
     at com.crystaldecisions.reports.queryengine.Connection.t1(SourceFile:2979)
     at com.crystaldecisions.reports.queryengine.Table.u7(SourceFile:2408)
     at com.crystaldecisions.reports.dataengine.datafoundation.AddDatabaseTableCommand.new(SourceFile:529)
     at com.crystaldecisions.reports.common.CommandManager.a(SourceFile:71)
     at com.crystaldecisions.reports.common.Document.a(SourceFile:203)
     at com.businessobjects.reports.sdk.requesthandler.f.a(SourceFile:175)
     at com.businessobjects.reports.sdk.requesthandler.DatabaseRequestHandler.byte(SourceFile:1079)
     at com.businessobjects.reports.sdk.JRCCommunicationAdapter.do(SourceFile:1163)
     at com.businessobjects.reports.sdk.JRCCommunicationAdapter.if(SourceFile:657)
     at com.businessobjects.reports.sdk.JRCCommunicationAdapter.a(SourceFile:163)
     at com.businessobjects.reports.sdk.JRCCommunicationAdapter$2.a(SourceFile:525)
     at com.businessobjects.reports.sdk.JRCCommunicationAdapter$2.call(SourceFile:523)
     at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
     at java.util.concurrent.FutureTask.run(Unknown Source)
     at com.businessobjects.crystalreports.designer.core.util.thread.ExecutorWithIdleProcessing$3.doWork(ExecutorWithIdleProcessing.java:182)
     at com.businessobjects.crystalreports.designer.core.util.thread.AbstractCancellableRunnable.run(AbstractCancellableRunnable.java:69)
     at com.businessobjects.crystalreports.designer.core.util.thread.PriorityTask.run(PriorityTask.java:75)
     at com.businessobjects.crystalreports.designer.core.util.thread.PriorityCompoundCancellableRunnable.runSubtask(PriorityCompoundCancellableRunnable.java:187)
     at com.businessobjects.crystalreports.designer.core.util.thread.PriorityProgressAwareRunnable.runSubtask(PriorityProgressAwareRunnable.java:90)
     at com.businessobjects.crystalreports.designer.core.util.thread.PriorityCompoundCancellableRunnable.doWork(PriorityCompoundCancellableRunnable.java:144)
     at com.businessobjects.crystalreports.designer.core.util.thread.AbstractCancellableRunnable.run(AbstractCancellableRunnable.java:69)
     at com.businessobjects.crystalreports.designer.core.util.thread.ExecutorWithIdleProcessing$IdleTask.run(ExecutorWithIdleProcessing.java:320)
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Thanks
Karthik
Edited by: KARTHIK1 on Oct 14, 2009 9:38 PM

Hi Ted,
Thanks for the feedback. I was able to create a report in Creystal Reports Designer 2008 using OCI. It is not allowing only in the Eclipse plugin. In our environment we are not allowed to user Oracle thin connections and ONLY OCI is allowed.
1) Can you please let me know if there is a way to do this?
2) Will it allow data sources using native database driver?
3) If so, can I use JRC to create these reports from a desktop java program?
Thanks & Regards
Karthik
Edited by: KARTHIK1 on Oct 15, 2009 4:38 PM

Dynamic %HINT ORACLE in select query

Hi Experts,
I am trying to implement given below code with dynamic % hint oracle
      SELECT vbeln posnr uepos
         FROM vbap INTO TABLE i_vbap
         FOR ALL ENTRIES IN i_vbak
          WHERE vbeln EQ i_vbak-vbeln
            %_hints oracle '&max_in_blocking_factor 500&&max_blocking_factor 500&'.
I want value 500 dynamic,
So far I have tried
%hint oracle lv_oracle_string.
%hint oracle (lv_oracle_string).
WHERE (lv_oracle_string).     "where conditon with %_hints oracle '&max_in_blocking_factor 500&&max_blocking_factor 500&'.
Any other ideas?
Thanks in Advance

Samuel,
Thank you so much, whatever you mentioned, I have tried ealier, but it was giving me dump because of incorrect spacing in my string.
Given below sloved my problem.
CONCATENATE '''&max_in_blocking_factor ' lv_oracle '&&max_blocking_factor ' lv_oracle '&'''
          INTO lv_oracle_string RESPECTING BLANKS.
          SELECT vbeln posnr uepos
             FROM vbap INTO TABLE i_vbap
             FOR ALL ENTRIES IN i_vbak
             WHERE vbeln EQ i_vbak-vbeln
             %_hints oracle lv_oracle_string.
Thanks you so much again. You Rock

How to store .doc file in oracle using jdbc

Here is problem , storing microsoft excel file (or) .txt file to database(ORACLE) through JDBC .
how to retrive

Congratulations! You are the one millionth person to ask how to store files in databases without searching for previous threads.
What do you win?
A hearty smack in the forehead and a strenuous endorsement to use Google, search and find the answer.

Oracle keeping JDBC connections ...

All
has anyone come got any ideas on this:
WLS6.0 sp2 on Win2k
Oracle v8
JDBC connection pool configured with 10 min connections / 50 max conns (in
increments of 5). Shrinking is active, and is set to run every 15mins.
What were seeing is that Oracle doesnt let go of any of the JDBC
connections. It literally keeps them for days on end, until we have to
manually kill them because theyre causing other DB problems.
any ideas ?
tks
will

Hello, I am using ALUI G6 (former Plumtree) and I am experiencing the same problem.
JDBC connections are not released and we reach the connection max number easily.
Please, can somebody help us ?
Thanks for your help,
Kind regards

Couldnot connect JBuilder 6 to ORACLE 8i , JDBC driver problem

Hi guys
I am trying to connect to the oracle 8i database from jbuilder 6 using a simple select statement , but it gives the following error
Root cause:
java.lang.NoClassDefFoundError: oracle/jdbc/driver/OracleDriver
     at _0002ftestEmployee_0002ejsptestEmployee_jsp_1._jspService(_0002ftestEmployee_0002ejsptestEmployee_jsp_1.java:83)
     at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:119)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.jasper.servlet.JspServlet$JspCountedServlet.service(JspServlet.java:130)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.jasper.servlet.JspServlet$JspServletWrapper.service(JspServlet.java:282)
     at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:429)
     at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:500)
     at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
     at org.apache.tomcat.core.ServletWrapper.doService(ServletWrapper.java:405)
     at org.apache.tomcat.core.Handler.service(Handler.java:287)
     at org.apache.tomcat.core.ServletWrapper.service(ServletWrapper.java:372)
     at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:812)
     at org.apache.tomcat.core.ContextManager.service(ContextManager.java:758)
     at org.apache.tomcat.service.http.HttpConnectionHandler.processConnection(HttpConnectionHandler.java:213)
     at org.apache.tomcat.service.TcpWorkerThread.runIt(PoolTcpEndpoint.java:416)
     at org.apache.tomcat.util.ThreadPool$ControlRunnable.run(ThreadPool.java:501)
     at java.lang.Thread.run(Thread.java:484)
plse help me how to connect jbuilder to oracle to access the data. I followed jbuilder doc like from the menu (Tools �� enterprise setup �� database driver ��)
but could not select the driver since it is marked as red (uninstalled). How can I made jdbc driver to available to jbuilder.?. I am using oracle 8i. Will oracle 8i supports jdk 1.3 b��cos I have noticed the jbuilder supports from jdk 1.3 onwards. So plse correct me if I am wrong
waiting for reply
sumesh

thanks for u'r reply.
you mean to say i need to install the new JDBC driver (Classes12.zip and nls_charset12) to the oracle/ora8i/jdbc/lib folder.currently this folder contains only classes102 and classes11.zip files and the corresponding charset only.After instaling the new classes12.zip file do i need to set the classpath?.

/oracle/ SID Directory is full

Hi, All
We are using ECC6 on HPUnix with Oracle. in our quality server /oracle/<sid> directory is full. Any one can explain what are the files i have to delete or i have to increase the volume.
Please suggest
Thanks & Regard
Venkat

Hi
Please also check the size of the /oracle/SID/saptrace directory, you can use du:
orasid> du -k /oracle/SID/saptrace
The saptrace directory holds the alert log, user and background traces of the database. Sometimes core files are placed there as well. All those files can be deleted (please do not remove the background and usertrace directories), but if you encounter a lot of traces or cores, you should investigate further and try to fix the problems.
Best regards
Michael

Connecting to Oracle using JDBC

Hi all,
I am a new to Oracle. I am trying to connect to Oracle using JDBC
The URL with which I tried to connect was:
jdbc:oracle:oci8:@myServiceName,user='myLogin',password='myPassword'
I get an error (ORA-12154)
- TNS could not resolve service name
When I use the same userid, password and service and connect thru' SQL*Plus it goes thru'. Is there any parameter which I am missing. Can anyone throw some light on this. I am held up with this issue badly.
Thanks for all your help and time.
Regards,
Latha

Hi Latha,
Please try to use thin and add port number.
m_conn = DriverManager.getConnection("jdbc:oracle:thin:@" + hostURL + ":" + port + ":" + database, user, password);
Hong
null

Performance hint: oracle's JDBC is full of trace(), OracleLog.print()

Similar Messages

Maybe you are looking for