Caching
It store data locally in order to speed up the performance
Overview
When caching is enabled, WAF saves responses in a directory and uses them to respond to clients without having to proxy requests for the same content every time.
How to Use :
- Go to WAF > Listener > Performance > Caching
- Click on Add the Caching Setting
- Click on Save Changes
Description
Enable Caching
To enable caching, enable the toggle button. It stores data so that future requests for that data can be served faster.
Accepted values: Enabled / Disabled
Default: Disabled
Re-validate Cache
This toggle button allows the re-validation of expired cache items. It helps in storing the updated data.
Accepted values: Enabled / Disabled
Default: Disabled
Enable Background Update
This toggle button enables the caching mechanism to update the cache in the background and store the updated data.
Accepted values: Enabled / Disabled
Default: Disabled
Enable Cache Locking
Enable to force caching a resource item to complete before allowing new requests to the same resource item.
Accepted values: Enabled / Disabled
Default: Disabled
Cache Methods
To cache responses to requests with methods other than GET and HEAD, list them along with GET and HEAD as parameters to this field. It specifies the HTTP Methods for which caching will be enforced.
Accepted values: HTTP Methods
Default: GET / HEAD
Maximum Request Cache Size
This field specifies the maximum request size allowed for the caching to store data exceeding which will not be cached.
Accepted values: Integer
Max: 999
Min: 10
Default: 500
Metric: mb
URI Filter
This field allows performing caching on the specific URI using one or more regex. If the field is empty then no filter perform
Accepted values: Regex
Default: Blank
Mime Type Filter
This field allows performing caching on the specific Mime type.
Accepted values: String
Default: Blank
Use Stale Cache
This field allows to specify the use of stale cache for errors when the back-end server is unavailable.
Accepted values: Type of errors to be cached
Default: error / invalid_header / updating / timeout / http_500 / http_502 / http_503 / http_504
Response Codes
This field specifies the list of HTTP status codes for which response will be cached.
Accepted values: Integer
Default: 200 / 304
Minimum Use Before Caching
To define the minimum number of times that a request with the same key must be made before the response is cached. It is specified in terms of a number of requests.
Accepted values: Integer
Max: 3600
Min: 1
Default: 3
Cache Validity
To limit how long cached responses with specific status codes are considered valid. It is specified in terms of minutes.
Accepted values: Integer
Max:365
Min:0
Default: 5
Metric: Minutes
Browser Cache Expiry
Specify the duration of the cached item after which it will be marked in the client's browser. It is specified in terms of days.
Accepted values: Integer
Max: 365
Min: 0
Default: 7