\documentclass[a4paper]{article}

\usepackage{pgfplots}

\begin{document}

\begin{tikzpicture}
\begin{semilogyaxis}[log ticks with fixed point]
	\addplot {exp(x)};
\end{semilogyaxis}
\end{tikzpicture}

\begin{tikzpicture}
\begin{semilogyaxis}[log ticks with fixed point={precision=4,fixed}]
	\addplot {exp(x)};
\end{semilogyaxis}
\end{tikzpicture}
\end{document}

