What is the number of non-compact generators of $\operatorname{so}(p, q)$ and $\operatorname{su}(p, q)$?

Question

Setting $n = p + q$, the total number of generators of $\operatorname{so}(p, q)$ or $\operatorname{su}(p, q)$ is respectively $n(n - 1) /2$ and $n^2 - 1$.

But what is the number of non-compact generators of $\operatorname{so}(p,q)$ and $\operatorname{su}(p,q)$?

Answer 1

I found the answer in a book of Robert Gilmore - Lie Groups, Lie Algebras, asnd some of Their Applications - DOVER EDITIONS - pages 412/414

$$\operatorname{so}(p, q)$$

Number of compact generators : $\frac{p(p-1) +q(q-1)}{2}$

Number of Noncompact generators : $pq$

$$\operatorname{su}(p, q)$$

Number of compact generators : $p^2 + q^2 - 1$

Number of Noncompact generators : $2 pq$