PersistenceTime

is an option for various functions that specifies when a persistent value should be treated as expired.

Details

PersistenceTime can be used for PersistentSymbol and InitializationValue.
Values can be given as relative times in seconds or relative date and time specifications.
Values are typically converted to absolute times based on the current time.
The value Infinity () can be used to specify that a persistent value should never expire.
An expired persistent value is treated as nonexistent, and the underlying persistent object may be removed.

open allclose all

Define a persistent value that expires in 5 seconds:

After 5 seconds, it is no longer used:

Define a persistent value that expires in 1 minute:

Numbers are treated as seconds:

Define a persistent value that expires in 5 days:

Values specified with PersistenceTime are converted to absolute expiration dates:

Top