adverb, noun which may take the genitive case particle 'no'
that much; only that; no more than that
Kansai dialect form of それだけ. Used to indicate an amount, extent, or limitation, often with a nuance of 'just that' or 'that's all'.
See also: それだけ
そんだけあれば十分や。
That much is enough.
そんだけのことで怒らんといて。
Don't get mad over just that.