473,840 Members | 1,425 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Fuego, Tomcat, JDBC & SQL Server 2000

Here is an obscure question that I am sure can be dealt with from a
10,000 ft view:

I have installed Fuego (an enterprise level BPM). Another application
was built in-house to connect to Fuego (Fuego has two SQL 2000
databases to handle the business process flow and instance flow). This
in-house application then uses Tomcat & JDBC to connect to the above
mentioned Fuego databases and a third SQL 2000 database that handles
the actual data.

The entire gist is this: The application(s) run the SQL calls as a
standard

It is SQL Server performing all of the cursor work; I'm guessing
through whatever translation layer. Maybe JDBC is causing this? Has
anyone seen this before?

My second problem is that I let the application run for 1 day in user
acceptance testing and I ended up with 1.8GB procedure cache (all
cursors) at 50% cache hit ratio and 140MB of data cache at 99% cache
hit ratio. What could be the cause?

Thanks,
Josh

Dec 13 '05 #1
1 1568
joshsackett (jo*********@gm ail.com) writes:
The entire gist is this: The application(s) run the SQL calls as a
standard

It is SQL Server performing all of the cursor work; I'm guessing
through whatever translation layer. Maybe JDBC is causing this? Has
anyone seen this before?
I have not worked with JDBC. But server-side cursors are not unheard of.
It is the default for ADO, for instance. (While ADO .Net does not have
them!)
My second problem is that I let the application run for 1 day in user
acceptance testing and I ended up with 1.8GB procedure cache (all
cursors) at 50% cache hit ratio and 140MB of data cache at 99% cache
hit ratio. What could be the cause?


This can happen with applications that generate SQL on the fly, instead
of using stored procedures. You get a lot of queries in the cache, and
that's not really good, as the chance for reuse is quite small. On top
of that, you get hash collitions in the cache, so you get a delay when
a query is submitted, as SQL Server looks to see if it is already in the
cache. This can be very painful on servers with 25 GB of memory.

The fact that the data cache is 140 MB and has a high hit ratio, indicates
that the queries are quite confined in which data they access. Probably
a good thing.
--
Erland Sommarskog, SQL Server MVP, es****@sommarsk og.se

Books Online for SQL Server 2005 at
http://www.microsoft.com/technet/pro...ads/books.mspx
Books Online for SQL Server 2000 at
http://www.microsoft.com/sql/prodinf...ons/books.mspx
Dec 13 '05 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

5
6481
by: Tom Martin | last post by:
I'm a Java Web developer NEWBIE that has inherited a website that fails every 2 hours due to poor connection pooling between Tomcat 4.0.6 and mySQL. In efforts to resolve this problem, I've created another replica DEVELOPMENT website and upgraded it to Tomcat 4.1.27. I was told this version of Tomcat supports Database Connection Pooling (DBCP) better than previous versions. I followed the instructions as listed at:...
1
15854
by: Oliver Hoehle | last post by:
Hello! I tried to get my J2EE app working with DB2 for several days and now it seems to work, but... (Tomcat 5.0.19 on NT 4.0 with J2SDK 1.4.1_02) 1) Declaring the DB2-datasource in $CATALINA_HOME/conf/server.xml did not work. All I got was a message like "Cannot create JDBC driver of class '' for connect URL 'null', cause: null"
0
4499
by: JShurmatz | last post by:
If anyone can shed some light on this problem I would greatly appreciate it. I am unsuccessfully trying to use a database connnection retrieved from a pool configured using Java System Web Server 6.1 with the SQL Server 2000 JDBC Driver. The background: 1. I have downloaded the SQL Server 2000 JDBC Driver and installed it on the web server.
4
13880
by: Riccardo | last post by:
Hi, This jsp code doesn't run. Why ? ----------------------------------------------------------- <%@ page import="java.sql.*" %> <%! String Query(String SQL, String DSN) {
0
3687
by: Monica Ferrero | last post by:
Hi! I'm not sure if this is the most adequate mySQL list for this post. If not, please indicat me which one I should use... I'm using Tomcat 4.1.24 with Apache 2 and MySQL 4.0.13. I have the mysql- connector-java-2.0.14-bin.jar in commons/lib. The application runs normally, and usually about once or twice a day I get this exception org.apache.commons.dbcp.DbcpException: java.sql.SQLException: Server configuration denies access to data...
5
10406
by: Steve | last post by:
Hi; I went to the microsoft site to try to find a guide to the error messages that the jdbc drivers give ( for sqlserver 2000 ). I had no luck. Does anyone know if there is such a guide? I got this mysterious error message below in my logs ( nothing visible
3
15407
by: Andrew Johnson | last post by:
Hi, I am trying to make a UBD DB2 7.2 connection using the Java COM.ibm.db2.jdbc.app.DB2Driver via Tomcat 3.2.1 on Solaris (and also on an AIX system with 3.3.1). I am attempting this either via JSP or a servlet. I have a separate java application that I can run from the command line and as long as the user has the correct env variables:
12
12596
by: brew82 | last post by:
I am trying to get connection pooling working with Tomcat 5.5 and DB2 v8.1. This was working under Websphere Studio Application Developer 5.x but we are trying to move onto Eclipse and Tomcat. The datasources seem to get created correctly but I get an error when I try to get the connection from the datasource: org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot create JDBC driver of class 'COM.ibm.db2.jdbc.app.DB2Driver' for...
1
4380
by: kommaraju | last post by:
iam a starter to db2 & jdbc.i have a servlet program which connects to ibm db2 using jdbc.when i run this using apache tomcat 4.1.34 , it is showing a error message of HTTP STATUS 500 my jdbc program is as follows import java.sql.*; import java.lang.*; import java.io.*; import java.util.*;
0
9856
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
9698
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
10916
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
10598
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
10657
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
1
7836
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
5872
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
4495
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
2
4071
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.