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Running the Oracle HTTP Server on OpenVMS

Apache Server Installation/Configuration

You should have prior experience tuning the performance of the OpenVMS 
operating system

.  

For general information on OpenVMS performance, see the 

OpenVMS Performance Management Manual at the following URL:

http://www.openvms.compaq.com:8000/73final/6491/6491pro.html

Recommendations for improving performance on a Oracle HTTP Server are 
provided below and in the Release Notes:

The following table shows sample values for the ORACLE Account from a working 
and exercised Oracle HTTP Server with a light to moderate load

.  

These values are 

presented as an example of a system performing well within its context

.  

If you 

should experience performance difficulties, refer to this table for guidelines in 
making adjustments

.  

For heavier loads, we point out which values, in our 

experience, need to be increased as load increases

.  

Keep in mind that no one set of 

values will be appropriate for all situations.

ASTLM (NonPooled)

Total number of asynchronous 
system trap (AST) operations and 
scheduled wake-up requests the 
user can have queued at one time

250

610

Or BIOLM + DIOLM + 10

BIOLM (NonPooled)

Number of outstanding buffered 
I/O operations permitted for a 
user’s process

150

300

You might also need to increase the 
SYSGEN parameter CHANNELCNT 
because it limits BIOLM,DIOLM, and 
FILLM.

BYTLM (Pooled)

Amount of buffer space a user’s 
process can use

64000

200000

Increase this value for a heavy load.

CHANNELCNT

256

FILLM and CHANNELCNT should be 
increased to match each other.