yes,and there is an offical tool to safely clean them:
http://www.postgresql.org/docs/9.1/static/pgarchivecleanup.html
在 2013-1-3 下午9:16，"Viktor" <viktor(at)okservers(dot)eu>写道：
> Hello,
>
> I have running postgresql maste-slave replication with activated
> archiving-mode on the master.
>
> Question: is it safe to clean older archived logs or it may corrupt the
> slave replication ? And what is the best way to clean them (by making
> snapshots)?
>
>
> --
> Regards.
>
>
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