msdanixu

For now it’s working, but I have noticed that there is no improvement in to use two servers. The CPU usage is the same but instead in one, in both. Also the keys are stored in both, so the writes are duplicated and the memory usage too, instead of to shard it.

I still thinking that to have Cluster support will improve the performance much more.

Best regards.

• This reply was modified 1 week, 1 day ago by msdanixu.

Hello,

Sorry for late response, but is a production environment and I have to do the tests with care. I’ll need some time because the problem is triggered randomly (can be 5 minutes or 8 hours after configuring the settings, who knows). Also I have to wait a week to continue testing, so I’ll keep this open until the tests are done.

Best regards.

Hello, sorry, I was busy doing tests.

I don’t know how it really works, but I suppose that to use several instances the plugin creates a copy in every instance and then LB the read request, right?. Normally to split the writes between the nodes requires of hashing to determine the correct node, and I don’t think that the plugin will do that.

That will not be the best approach, because the Write RPS will not be increased. In common scenarios this is not a problem because the Cache is supposed to be most of the time reading, but I am having weirds problems with W3TC that makes a lot of write requests to the Redis instance. After some time the redis instance starts to get a lot of reads and writes until all the WordPress instances are restarted (GKE deployment).

We are not sure about the reason (we suspect about the WooCommerce combination with W3TC), so the only we can do for now is to increase the RPS capacity of the instance. The threading in redis doesn’t increases too much the capacity, so the best is to use clustering which increase the capacity much more.

The PHP module is compatible and I can configure the sessions to use the cluster, but the W3TC plugin has not implemented the cluster usage.

Best regards.

• This reply was modified 1 month ago by msdanixu.
• This reply was modified 1 month ago by msdanixu.

Hello, thanks for your response.

The support request were done using the option that you say. I have not put too much effor looking at the spam folder, but from time to time I take a look and I have not seen any response there.

About the license, after trying several ways and with patience (some tests were not working at the first, second, third… attempt, and a time later magically they have worked fine), I have managed to deactivate the license on our PRE environment and activate it in our PRO environment, keeping the PRE and QA environments in “PRO DEVELOP” mode. I still now knowing how I have done it, because the last time I have tried to do it I was not able to enable the “PRO DEVELOP” mode in QA.

Best regards.