\documentclass{article}
\usepackage{pgfplots}
\pgfplotsset{compat=1.5}

\begin{document}
\begin{tikzpicture}
%\tracingmacros=2 \tracingcommands=2
\begin{semilogyaxis} [
	%axis equal,
	%disabledatascaling,
	xlabel=x,ylabel=y,
	scale mode=scale uniformly,
	]
\addplot {exp(x)};
\end{semilogyaxis}
\end{tikzpicture}
\end{document}
