The performance file could not be written (see long text)

What causes this issue?

The memory is now full.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Contact your system administrator.

Procedure for System Administrators

In transaction AL11, double-click on DIR_DATA to find out the name of
the directory whose partition is full. Delete any files on this
partition that are no longer required or assign more memory to this
partition.

Error message extract from SAP system. Copyright SAP SE.