[TYPO3-english] Update to 4.1.10 increased apache load

[helge preuss]

Hi Bas,
> Do you have a large website? Because in our case, when we changed the encryption key as part of the upgrade, just about every dynamically generated image had to be rebuilt. This caused quite a strain on the web servers, which eventually tapered off again as more and more images became available directly from disk.. so I'd say this is normal.
>   
Yes, our website is quite large. Where can I find out more about the
encryption key and how it is used? I have to admit that I can only guess
at what you mean. My guess evaluates to the pictures in the typo3temp
folder - but only about 1000 images have been generated there yesterday.
That does not explain high load for half a day.

I assume that the load increase is in fact a normal occurrence after an
upgrade, but I have never heard about it and I want to understand what
happens...

Thanks, Helge
> Bas
>
> ________________________________________
> From: typo3-english-bounces at lists.netfielders.de [typo3-english-bounces at lists.netfielders.de] On Behalf Of helge preuss [regnans at gmail.com]
> Sent: Thursday, February 12, 2009 12:37 PM
> To: typo3-english at lists.netfielders.de
> Subject: [TYPO3-english] Update to 4.1.10 increased apache load
>
> Hello all,
>
> I upgraded my Typo3 installation from 4.1.7 to 4.1.10 yesterday and
> encountered a weird phenomenon. Within 5 minutes (the interval at which
> we log the load) the CPU usage increased by 60%, the system load grew
> correspondingly. The CPU usage then stayed at that level all day. Today
> (when I was prepared to downgrade again and apply the security patches
> manually) everything is back to normal again.
>
> The database load was not affected by the upgrade.
>
> Does anybody have an explanation for that? Has anybody else experienced
> this?
>
> Greets,
>
> Helge
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