Large table is placed on extra page

Question

I am using LaTeX, and I have a large table in my report, the height of table is a little more than half of the paper. all the text after the table will go to the next page, and in this page just the table remain and a lot of space after and before the table!

Answer 1

This line will solve your problem:

\renewcommand{\floatpagefraction}{0.8}

If it is a double column paper, you may need this instead/as well:

\renewcommand{\dblfloatpagefraction}{0.8}

Answer 2

Your table is too large to fit onto a normal page of text and is therefore placed on a "float page", i.e. a page which only contains material from table and figure (or custom defined) float environments.

If you want to place such a large table on a normal page you can either modify the appropriate settings (see How can I get the figures not to be pushed to the end of the document?). Increasing the \floatpagefraction already mentioned by Forrest allows larger tables on normal text pages. It states which fraction of the page a table or figure can consume before placed on an extra page. You can also add ! into the optional placement specifier of the table environment, i.e. \begin{table}[!ht], to overwrite/ignore this settings for the specific table.