enforced by the kernel (as set by <literal>ulimit -s</literal> or local

equivalent), less a safety margin of a megabyte or so. The safety

margin is needed because the stack depth is not checked in every

routine in the server, but only in key potentially-recursive routines

such as expression evaluation. The default setting is two

megabytes (<literal>2MB</literal>), which is conservatively small and

unlikely to risk crashes. However, it might be too small to allow

execution of complex functions. Only superusers can change this

setting.

routine in the server, but only in key potentially-recursive routines.

The default setting is two megabytes (<literal>2MB</literal>), which

is conservatively small and unlikely to risk crashes. However,

it might be too small to allow execution of complex functions.

Only superusers can change this setting.

</para>

<para>