We have approx 20 sites that are hosted in an Azure environment on a standard web server. This server was upgraded last week from a standard A2 server (2cpu, 4gb, unmanaged disk) to an A4v2 server (4cpu, 8gb, managed ssd).
Since the upgrade, every site has an issue with the initial time that a page Document type is loaded. Depending on the complexity of the DocType, the TTFB can be anything from 2 minutes to 10 minutes! The previous server took less than a second.
Once that DocType is loaded (and I presume cached), any further views of a page with that DocType loads instantly.
Obviously this is an extremely poor user experience for end users, as if they are the poor soul who loads up the page first, they're sat there for ages!
We have gone through a pain-staking fault-finding exercise but we can't find an obvious reason as to why this is happening. The previous server did not do this and this also does not happen on our Staging environment (which is still an A2).
We are currently in the position that we are unable to upgrade any client as if we do, the site is deployed to a new subfolder within IIS and the page-initial-load-caching needs to be done all over again, manually!
I have seen that a lot of people have said that problems with Azure are well documented but these are articles from 2 years ago and a lot of the things that they suggest are part of the core Umbraco build now. I am hoping that someone has either had this happen before and knows the exact reason or can point me in the right direction. Our current thoughts are that this could be due to going from Unmanaged disks to Managed disks.
We have so far:
Ensured IIS is running in 32 bit mode
App Pool "StartMode" to "AlwaysRunning"
App Pool idle timeout to "Suspend"
Site "Preload Enabled" to "True"
We're currently running v7.15.3.
Is there anything that I can review/logs etc that will give me more information from within IIS or the SQL database?
If anyone can help, it would be extremely appreciated!
Slow first load on Document types in Azure
Hi,
We have approx 20 sites that are hosted in an Azure environment on a standard web server. This server was upgraded last week from a standard A2 server (2cpu, 4gb, unmanaged disk) to an A4v2 server (4cpu, 8gb, managed ssd).
Since the upgrade, every site has an issue with the initial time that a page Document type is loaded. Depending on the complexity of the DocType, the TTFB can be anything from 2 minutes to 10 minutes! The previous server took less than a second. Once that DocType is loaded (and I presume cached), any further views of a page with that DocType loads instantly.
Obviously this is an extremely poor user experience for end users, as if they are the poor soul who loads up the page first, they're sat there for ages!
We have gone through a pain-staking fault-finding exercise but we can't find an obvious reason as to why this is happening. The previous server did not do this and this also does not happen on our Staging environment (which is still an A2).
We are currently in the position that we are unable to upgrade any client as if we do, the site is deployed to a new subfolder within IIS and the page-initial-load-caching needs to be done all over again, manually!
I have seen that a lot of people have said that problems with Azure are well documented but these are articles from 2 years ago and a lot of the things that they suggest are part of the core Umbraco build now. I am hoping that someone has either had this happen before and knows the exact reason or can point me in the right direction. Our current thoughts are that this could be due to going from Unmanaged disks to Managed disks.
We have so far:
We're currently running v7.15.3.
Is there anything that I can review/logs etc that will give me more information from within IIS or the SQL database?
If anyone can help, it would be extremely appreciated!
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