Increase The Number Of Database Connections Allowed - VMware ACE Management Server Administrator's Manual

ACE Management Server Administrator's Manual
Create a System DSN Entry for a Linux Database
On Linux systems, you use a text editor or the ODBCConfig graphical (X11) utility to create a system DSN entry.
The ODBCConfig utility mimics the Windows ODBC Data Sources Control Panel plug‐in.
Before you begin, determine the correct ODBC driver:

On Red Hat Enterprise Server, the driver is located at /usr/lib/libodbcpsql.so.

On SUSE Linux Enterprise Server 9, the driver is located at /user/lib/unixODBC/libodbcpsql.so.2.
The DSN configuration for the unixODBC package is stored in the /etc directory (/etc/unixODBC for
SUSE Linux Enterprise Server).
If you are using the ACE Management Server appliance, see "Set Up a Connection Between the Server
Appliance and an External Database" on page 33.
You use the odbc.ini file for creating DSNs and the odbcinst.ini file for driver and general ODBC system
configuration.
To create a System DSN entry for a Linux database
1 As root, use the ODBCConfig utility to create a System DSN entry.
You also must configure the server address and the database name in the DSN settings.
For information about using unixODBC, see the unixODBC Project Web page.
The ODBCConfig utility makes changes to the odbc.ini and odbcinst.ini files.
2 Make a note of the database DSN, user name, and password.
You can now use the browser‐based ACE Management Server Setup application to connect to this database.

Increase the Number of Database Connections Allowed

For optimal server performance, ACE Management Server starts multiple parallel threads (on Windows) or
processes (on Linux) listening for the incoming connections from the clients. Every client connection typically
runs a database transaction, so it needs to open a database connection.
ACE Management Server usually requires as many database connections as it does parallel threads or
processes for client connections. If the server runs out of database connections, the clients might start receiving
connection errors.
Following is a list of the locations for the Apache configuration file and the typical default number of
connections:
Platform
Windows
Red Hat Enterprise
Linux
SUSE Linux
ACE Management
Server appliance
The default installation of the PostgreSQL database on Red Hat Enterprise Linux allows 100 remote
connections, which is less than the number of parallel threads that the Apache server starts by default on the
same platform. Change this number if you expect a high volume of client requests to your server (more than
100 active clients).
32
Location
C:\Program Files\VMware\VMware
ACE Management Server\Apache2\
conf\httpd.conf
/etc/httpd/conf/httpd.conf
/etc/apache2/server-tuning.conf
/etc/httpd/apache2.conf
Client Connections
250 (WinNT MPM section)
256 (prefork MPM section)
150 (prefork MPM section)
20 (prefork MPM section)
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