Hello I'm using Twisted 8.1.0 as socket server engine. Reactor - epoll. Database server is MySQL 5.0.67. OS - Ubuntu Linux 8.10 32-bit in /etc/mysql/my.cnf: max_connections = 1000 in source code: adbapi.ConnectionPool("MySQLdb", ..., use_unicode = True, charset='utf8', cp_min=3, cp_max=700, cp_noisy=False) But i...
I have a C application using the MySQL library for database access. Is there a standard way to implement database connection pooling for such an application? The C connector doesn't appear to support it. ...
Currently we are using 4 cpu windows box with 8gb RAM with MySQL 5.x installed on same box. We are using Weblogic application server for our application. We are targeting for 200 concurrent users for our application (Obviously not for same module/screen). So what is optimal number of connections should we configured in connection pool (m...
We are getting the following error on a certain database occasionally under moderate load. "System.InvalidOperationException: Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached." I have combed through ...
Hello, we have a DAL that needs to wrap many database inserts in a single transaction that we can rollback or commit. What is the best practice for handling that? We are currently doing the following: Create DB Connection and Transaction Fill a collection with all the classes that represent an action to perform. Pass in the conn...
Hi, I'd like to know how to modify the server.xml file so all my webservices built on axis2 can talk to the DB using Connection Pooling. Each webservice has a different data source, one points to one instance of the DB and the other to another DB server. How do I specify the context that should be used by each service? Thanks in advanc...
I found a lot of information about how to make a database factory or how to deal with connection pooling but i nowhere found a complete solution. I have always used my own solutions, but they're not complete i think or could be improved. Are there some good designed classes any of you use that i can find on the net? Thanks ;-) ...
I was always using JDBC in JavaSE on single-threaded environment. But now I need to use a connection pool and let many threads to have interaction with the database (MSSQL and Oracle) and I am having a hard time trying to make it as it seems that I am lacking some fundamental undestanding of the api. AFAIK after connect and logging a Co...
Setup: I'm creating a .NET WinForms application in C# to allow our technical support folks to easily perform common tasks against our product's SQL Server 2005 database. The application is using ADO.NET (SqlConnection) to connect to the database. One concern in developing this application was to minimize the overhead of connecting/re-...
when my app startup, i get error like below, can anyone elaborate what i missed out? the app running fine when using mysql. do i miss out any extra parameter in config.xml file? 2009-08-17 11:32:12,294 [main] INFO [info.jtrac.config.DataSourceFactoryBean] - Not using embedded HSQLDB or JNDI datasource, switching on Apache DBCP data sour...
How to set connection pool to 100 in sql server 2005 instance ...
I already set up MySQL connection pool in Glassfish using JNDI. I only execute one query at a time but use the same sql instance. Everything seems to work fine except creating temporary tables and use them. In short, even though after I create a temporary table, insert query does not work since the table does not exist. Are there any con...
As can be seen in this document, a number of preconditions have to be met before TCP connection pooling "works" in java when using URLConnection. How can I determine if the connections are being pooled ? Are there any objects I can inspect in the sun jdk for this ? ...
I have been looking for some good instructions on how to utilize connection pooling in Tomcat 6 connecting to Mysql 5, but there does not seem to be any complete references. I am having trouble piecing together different tutorials to get a clear picture. I must admit, I am very much a beginner in dealing with Tomcat and it's configurat...
I have a utility class that creates & returns a db connection: Public Shared Function GetConnection() as OracleConnection dim c as New OracleConnection() ... set connection string... c.Open() Return c End Function Is there any risk of concurrent calls returning the same connection? The connection string enables pooling. ...
I'm wondering about the best approach to designing a DB connection manager for a load-balanced n-tier system. Classic n-tier looks like this: Client -> BusinessServer -> DBServer A load-balancing solution as I see it would then look like this: +--> ... +--+ +--> BusinessServer +--+-...
Possible duplicates: http://stackoverflow.com/questions/39753/connection-pooling-in-php and http://stackoverflow.com/questions/830707/php-connection-pooling-mysql I used to restore connections in $_SESSION. but found it not good. ...
We have a java server connecting to a MySQL 5 database usingHibernate as our persistence layer which is using c3p0 for DB connection pooling. I've tried following the c3p0 and hibernate documentation: Hibernate - HowTo Configure c3p0 connection pool C3P0 Hibernate properties C3P0.properties configuration We're getting an error on ...
I found this in the Tomcat documentation here What I don't understand is why they close all the JDBC objects twice - once in the try{} block and once in the finally{} block. Why not just close them once in the finally{} clause? This is the relevant docs: Random Connection Closed Exceptions These can occur when one request gets a db ...
I'm trying to figure out the best way to minimize resource utilization when I have PHP talking to various backend services (e.g. Amazon S3 or any other random web services -- I'd like a general solution). Ideally, I'd like to have a single persistent connection to the backend (or maybe a small pool of persistent connections) with some ca...