How to manage/tune PostGres

Hello all,

My company mainly use Oracle as database but we would like to make some
tries with some open source database.
I think PostGreSQL might be candidate for our project.
I read several documents on it, but I wasn't able to find any infos on what
are exactly the needs, in term of administration,
and, if any, how to manage/tune that database in a production context. Are
there any graphical tools to do this ?
(like OEM for example)
MySQL, an other open source database, is available. What are the reasons
that makes me happy to put my choice on PostGreSQL ?
Thank you in advance for any info.
PhL

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