Re: Upgrade procedure

> >From: rihad <rihad(at)mail(dot)ru>
>
>> Hi, all. Why is it normally suggested to stop the server, upgrade it, 
>> then start it? Wouldn't it be easier & quicker to simply upgrade the 
>> package in-place and restart the service? On OSen that allow 
>> modification of currently running binaries, which is most Unix OS, M$ 
>> Windows being a notable exception )
>>
> That might be possible on a minor upgrade, but quite probably not on a 
> major version upgrade. I'm reasonably sure I've read that a major 
> upgrade *can* change underlying data/structures for tables and other 
> things. I don't think you want version-X writing to the tables on disk 
> while version-Y writes a new layout to the same files at the same 
> time. 😊
>
>

Why would that matter if the server gets restarted after replacing the 
binaries? Aren't previous version's binaries "hard-wired" into memory 
while they are running? AFAIK on FreeBSD at least no attempt is made to 
stop the corresponding server or restart it when a package is upgraded 
by pkg(8).