The following elements are used throughout the BIND configuration file documentation. Elements that are associated with only one statement are described only in the section that discusses that statement.
number. The value for
numberis limited to 0 through 65535, with values below 1024 typically restricted to root-owned processes.
number, the word unlimited, or the word default.
The maximum value of
size_spec is that of unsigned
long integers on the machine. The unlimited option requests unlimited
use, or the maximum available amount. The default option uses the
limit that was in force when the server was started.
number can optionally be followed by a scaling factor: K
or k for kilobytes, M or m for megabytes, and
G or g for gigabytes, which scale by 1024, 1024*1024,
and 1024*1024*1024, respectively.
Integer storage overflow is currently silently ignored during conversion of scaled values, resulting in values less than intended, possibly even negative. Using unlimited is the best way to safely set a really large number.