Page History
| Stoc |
|---|
Java Virtual Machine (JVM) Tuning
Java Version
Servoy supports both Java 5 and Java 6 (for the Application Server, the Smart Client and Servoy Developer). As Java 6 has numerous performance improvements, it is preferred over Java 5.
...
| Note |
|---|
An 32 bit JVM will allow a max memory of 2 Gb in total, In order to run with larger heap sizes (over 2 Gb) you have to use 64 bit JVM on a 64 bit OS |
Java Virtual Machine Server Mode
Java has 2 distinct operating modes: client mode and server mode. When running in server mode, the startup of the Java process will take longer and initial execution of code will be slower, but after a while the application will perform faster. The server mode is best suited for the Servoy Application Server.
...
| Note | ||||
|---|---|---|---|---|
| ||||
On Windows 32 bit environments, the Java Runtime Environment does not include support for server mode. In order to take advantage of server mode optimizations on 32 bit Windows systems, it is required to install Java Development Kit (JDK) |
Memory
Database Connection Pool Tuning
See Connection Pooling in the Database Connections chapter
Database Tuning
Architecture
In order to get the best possible performance, the communication between the Servoy Application Server and the database needs to be as fast as possible. The fastest option would be installing the database engine and the Servoy Application Server on the same machine, whether or not this is possible depends on the dimensions of the physical server and the resource requirements of both the database engine and the Servoy Application Server.
When opting for dedicated servers for both the database engine and the Servoy Application Server, the connection between them should be as fast as possible, preferably a direct 1Gb cable connection between the two machines.
Database
...
Tuning
When experiencing performance issues the 'Performance Data' page of the Servoy Admin page can be analysed to find slow performing SQL statements, or SLQ statements that are fired often.
...
Especially for SQL statements that are fired often and take up significant time it should be checked if it's possible to optimize the database, for example by creating the relevant indexes.
Foundset Loading Tuning
Servoy loads a foundset by first retrieving the PKs from the database. This retrieval is done in chunks: when the foundset is initialized, the first chunk is retrieved, consecutive chunks are retrieved when needed.
...
The values can be modified in an attempt to increase performance. The optimal values differ per application, thus no guidelines are available for alternative values. Tuning needs to be done by altering the values and monitoring the performance afterwards. The defaults are set based on averages.
Web Client Tuning
Content Compression
In order to minimize the size of the content that the browser has to download for the Web Client, the application server serving the content can compress the content. The Servoy Application Server is configured to automatically compress content.
...
Save the edits and restart the Servoy Application Server to let the configuration changes take effect.
Servoy Application Server Log
At all times try to keep the Server log free from javascript application errors/excpetions, all application exceptions point to possible problems inside the application.
...
Overview
Content Tools
Activity