performance impact of non-C locale

[Axel Rau <Axel.Rau@xxxxxxxxx>]

Hi everyone,

some erp software requires a change of my pgsql cluster from
	locale C		encoding UTF-8
to
	locale de_DE.UTF-8	encoding UTF-8

Most of my databases have only ASCII text data (8 bit UTF8 code range)  
in the text columns.
Does the above change influence index performance on such columns?

Does postmaster keep track on any multibyte characters being inserted  
in such columns, so that the planner can adapt?

What other performance impacts can be expected?

Axel
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