The system scanning resource settings that you can modify to enhance performance are as follows:
Temporary directory for scanning
You can change the location of this temporary directory to support sites with large, specialized disk configurations. The disk space that is required for this directory varies depending on the volume of files to be scanned. Symantec Protection Engine performance depends on this directory being able to accommodate a large volume of large files during periods of peak use.
Number of available threads for scanning
This value defines the maximum number of scanning threads that Symantec Protection Engine generates. Symantec Protection Engine initializes 16 threads when the service starts. The value is incremented according to the load to a maximum of 128 threads. You can decrease the value based on your hardware configuration. The maximum value is 512 threads.
Symantec Protection Engine can decompose and scan the contents of container files in memory, which eliminates the latency that is imposed by on-disk scanning. This feature can improve performance in environments in which large volumes of container and archive file formats are routinely submitted for scanning.
You can limit the resources that Symantec Protection Engine consumes for processing files in memory by specifying the following settings:
The maximum RAM to use for the in-memory file system (in megabytes)
The default value is 128 MB. The maximum value is 2048 MB (2 GB).
For systems with larger amounts of memory, scanning is improved when a larger section of RAM is set aside for in-memory file scanning. Keep in mind, however, that the RAM setting should be set low enough so that no file swap usage occurs.
The maximum file size that can be stored within the in-memory file system (in megabytes)
The default setting is 16 MB. The maximum setting is 2048 MB (2 GB). Files that exceed the specified size are written to the disk.
This parameter defines the maximum size of a particular file which can be loaded in memory for scanning. The maximum size becomes significant if the average file size is high.
Notify a file server when Symantec Protection Engine updates definitions
The process of sending notifications to the file server about definition updates can affect system resources, depending on how often you schedule LiveUpdate or Rapid Release. To minimize the effect on performance, you can send the notification on demand, as needed.