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Re: Question to safe way for minor update

From: Thomas Papke <tp(at)thopap(dot)de>
To: Peter Eisentraut <peter_e(at)gmx(dot)net>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: Question to safe way for minor update
Date: 2007-02-14 06:55:14
Message-ID: 45D2B252.4010109@thopap.de (view raw or flat)
Thread:
Lists: pgsql-admin
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.
>
>  
>

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