What does 度量が知れる mean?


For example here
<https://twitter.com/vladiii_ap_bot/status/321001378766000128>. EPWING
dictionary and Google search didn't help.

> 追従も度が過ぎると **度量が知れる** ぞ、ダーニック。余を領王と呼ぶお前は、我が主人でもある。余はサーヴァント、そのことを否定はせん




元ネタは[これ](http://typemoon.wikia.com/wiki/Darnic_Prestone_Yggdmillennia)っぽい。

In this context, the speaker, as a Servant of Darnic, says Darnic should not
be too obsequious to the speaker, although Dernic refers to the speaker as
Lord (領王).

Someone's 度量 refers to their capacity, potential, tolerance, generosity, etc.

度量が知れる literally means something like "reveal one's capacity", and it is a set
phrase usually used to point out someone's little-mindedness, petty-
mindedness, incompetence, etc.

