Some URLs cache TTL is set too long even though the contents can be updated more frequently. So I need to reduce the cache TTL to a shorter value.
You can set the time-to-live (TTL) value of an object in the cache, in seconds, by using CPL or VPM policy rule.
Upon expiration, the cached copy is considered stale and will be re-obtained from the origin server when next accessed. However, this property has an effect only if the following HTTP command line option is enabled: Force explicit expirations: Never serve after. If the above option is not set, the ProxySG appliance’s freshness algorithm determines the time-to-live value.
From VPM: Add web content layer (or on existing Web content layer) -> Add rule -> right-click on Destination -> set request URL From the same rule, right-click on Action -> click Set -> click New -> Set TTL -> set the TTL value (seconds) -> OK -> OK Install policy
CPL in local policy
Example <Cache> ; Delete the specified cached objects after 30 seconds. url=//www.example.com/dyn_images ttl(30)
Imported Document ID: 000011249
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