Re: [Observium] APCu Caching not working?

8 Jul 2021

      Please try update to latest Observium revision (rolling updates).
I upgraded used caching library, there may have been some
incompatibilities with recent php versions (>=7.2).
Although personally I had no problems even with php 8.0 and APCu.
Graeme Davis via observium wrote on 08.07.2021 15:07:
...
Our main Observium instance has been loading very slow recently ... I
disabled APCu (caching was set to auto) and it's soooo much faster
now!  We're on CentOS 7 / PHP 7.4 / MariaDB 10.2
Thanks,
Graeme
On Wed, Jul 7, 2021 at 10:47 AM Milton Ngan via observium
<observium@observium.org mailto:observium@observium.org> wrote:
this is running on ubuntu18.04 with php7.2. but i repro’ed the
issue on ubuntu 20.04 with php7.4. 

Sent from my iPad

...
On Jul 7, 2021, at 2:35 AM, Adam Armstrong via observium
<observium@observium.org <mailto:observium@observium.org>> wrote:

 What version of PHP is this to have a 3 year old apcu?

Adam.

Sent from my iPhone

...
On 7 Jul 2021, at 10:32, Milton Ngan via observium
<observium@observium.org <mailto:observium@observium.org>> wrote:

APCu is definitely installed. PHP sees it, Observium sees it.
But when you use /cache_info in the URL you can see it
constantly writing back to the cache, and never getting any hits. 

<Screen Shot 2021-07-05 at 2.20.18 PM.png>
<Screen Shot 2021-07-06 at 10.57.39 AM.png>

...
On Jul 6, 2021, at 10:24 AM, Markus Klock via observium
<observium@observium.org <mailto:observium@observium.org>> wrote:

Did you install the php-apcu package?
sudo apt-get install -y php-apcu

/Markus 

Den tis 6 juli 2021 kl 18:40 skrev Milton Ngan via observium
<observium@observium.org <mailto:observium@observium.org>>:

    I have noticed that when I enable webUI caching, that the
    page loads don’t speed up. It regularly takes 3 seconds to
    render a page, although the tool tip at the bottom shows
    APCu caching is enabled. However, if I force the cache
    driver to “files”, then I see a huge speed up (page loads
    drop to about 100-200ms).

    Is there some extra config to get APCu working correctly? I
    didn’t see anything in the docs, but I could have missed it.

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Mike Stupalov
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