Update the Apache Configuration File
Required User Role: Root user
Tenable Security Center 6.3.x updated the Apache web server configuration to resolve a memory leak issue. When you upgrade to Tenable Security Center 6.3.x, you must update some values in the Apache configuration file located at /opt/sc/support/conf/mpm.conf:
Before you begin:
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Stop Tenable Security Center, as described in Start, Stop, or Restart Tenable Security Center.
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Install Tenable Security Center or Upgrade Tenable Security Center
To update the Apache configuration file:
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Navigate to the Apache configuration file, located at /opt/sc/support/conf/mpm.conf
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Update the values in the configuration file. Tenable recommends the following settings based on the size of your deployment:
# Hosts Managed by Tenable Security Center Recommended Settings
10,000 to 25,000 active IPs
StartServers 10
MinSpareServers 10
MaxSpareServers 20
MaxRequestWorkers 64
25,001 to 100,000 active IPs
StartServers 20
MinSpareServers 20
MaxSpareServers 40
MaxRequestWorkers 128
100,001 or more active IPs
StartServers 40
MinSpareServers 40
MaxSpareServers 80
MaxRequestWorkers 256
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Restart Tenable Security Center, as described in Start, Stop, or Restart Tenable Security Center.
What to do next:
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After the Tenable Security Center build has run for a period of time, check the log located at /opt/sc/support/logs/error_log for any errors related to the MaxRequestWorkers setting. For more information, see Generate a Diagnostics File.