Right now our 8.1.4 is running without any compiler options. Any
possible problem if i will compile the 8.1.8 with CLAGS -O2
-march=Opteron --> will the datafiles of the 8.1.4 non optimized
postgres make any problems?

Thanks a lot,
Thomas

Peter Eisentraut schrieb:

>Thomas Papke wrote:
>
>
>>1. i am running a large postgres 8.1.4 database in production. What
>>is a good and safe way for an minor update to 8.1.8 (less downdown
>>and possible jump back option)?
>>
>>
>
>Using binary packages, install the new one over the old one, and if you
>don't like it, install the old one over the new one.
>
>
>
>>How riskful is an minor update for the data files?
>>
>>
>
>Not riskful.
>
>
>
>>2. i am using two dualcore opterons with 8GB memory - if i am using
>>the CFLAGS="-O2" option for compile optimization --> is there any
>>real performance boost?
>>
>>
>
>I don't think anyone has ever seriously considered building with
>anything less than -O2 for anything but debugging purposes or coping
>with buggy compilers on rare architectures. In other words, there
>isn't any good reason not to do it.
>
>
>