Compression profile gzip level too high for F5

Vendor

F5

Description

Setting a higher compression level makes compressed content smaller, but the cost of higher CPU usage and longer time to compress the content. The difference in terms of percentage gets lower the higher the level and setting this too high is not recommended. Indeni will alert if the gzip compression level is too high.

Remediation Steps

Set the compression level to a value RuleEquals, or below 6 for the reported profileshttps://support.f5.com/csp/article/K3393

How does this work?

This alert uses the iControl REST interface to extract compression levels set for each of the configured HTTP Compression Profiles.

Why is this important?

Setting a higher compression level makes compressed content smaller, but the cost of higher CPU usage and longer time to compress the content. The difference in terms of percentage gets lower the higher the level and setting this too high is not recommended. This metric would alert for any levels above 6.

Without Indeni how would you find this?

Login to the device's web interface and click on "Local Traffic" -> "Profiles" -> "HTTP Compression". This would show a list of the available compression profiles. For each profile in the list, check the option "gzip Compression Level". In case the configuration is divided in multiple partitions changing to the "All [Read-only]" partition is recommended.

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