[Tex/LaTex] TeX Gyre Pagella Math Integral sign much too small

Question

I am writing my thesis and I use the TeX Gyre Pagella Math fonts, but I have noticed that the integral sign is much too small compared to fractions.

as you can see in the above image. I am using LuaLaTeX.

Is there any way to make the integral sign a more sensible size?

A minimal example:

\documentclass{article}
\usepackage{unicode-math}
\setmathfont{TeX Gyre Pagella Math Regular}

\begin{document}
    \begin{equation}
    f(a) = \frac{1}{2\pi i}\int_\gamma \frac{f(z)}{z-a}\mathrm d z
    \end{equation}
\end{document}

Thanks in advance!

Answer 1

Simply adjust the DisplayOperatorMinHeight font parameter. That also indicates that the font is broken.

\documentclass{article}
\usepackage{unicode-math}
\setmathfont{TeX Gyre Pagella Math}
\everydisplay{\Umathoperatorsize\displaystyle=5ex}
\begin{document}

\[\int_\gamma\frac{f(x)}{z-a}\]

\end{document}