如何评估temporary tablespace的extent size??

今天在看10g document的时候看到如下的描述

You should monitor temporary tablespace activity to check how many extents are
being allocated for the temporary segment. If an application extensively uses
temporary tables, as in a situation when many users are concurrently using temporary
tables, the extent size could be set smaller, such as 256K, because every usage requires
at least one extent. The EXTENT MANAGEMENT LOCAL clause is optional for temporary
tablespaces because all temporary tablespaces are created with locally managed
extents of a uniform size. The default for SIZE is 1M.

如果是这样，要如何去评估temporary tablespace 的extent size呢