I have a website up and running. The website worked fine on localhost with no such errors but after I put it online it started showing 507 insufficient storage page whenever two or three users used the same page at the same time.
For example there is a webpage chat.php which runs an ajax request to update the chats every 700 milliseconds. Side by side two ajax requests keep checking for messages and notifications. These ajax requests are completed using javascript's setInterval method. When this page is accessed concurrently by two or more users the page does not load and shows the error and sometimes the page shows 429 too many requests error. So at the same time maximum 4 requests can occur at the user's end and that too if the scripts run at the same time. Could this occur because of the limited entry processes? The hosting provides me with 10 limited entry processes by default. Please reply and leave a comment if you want me to post the setInterval method code even though I think the problem is something else here.
For example there is a webpage chat.php which runs an ajax request to update the chats every 700 milliseconds.
These ajax requests are completed using javascript's setInterval method.
When this page is accessed concurrently by two or more users the page does not load and shows the error and sometimes the page shows 429 too many requests error.
So at the same time maximum 4 requests can occur at the user's end and that too if the scripts run at the same time.
The hosting provides me with 10 limited entry processes by default.
Please take some time to read through (your own) quotes.
You stating that you AJAX the te server every 700ms and you do so by using setInterval. There is a maximum of 4 requests per user and 10 in total. If there is 2 or more visiters stuff goes haywire.
I think multiple things may be causing issues here:
You hit the 10 requests limit because of multiple users.
When 2 users hit 4 requests your at 8, if anythings else does a requests on the server you very quickly hit the maximum of 10. With 3 users with 4 requests your at 12 which according to your question hits your limit.
You might be DOSsing your own servers.
Using setInterval to do AJAX requests is bad. really bad. The problem is that if you request your server every 700ms and the server needs more than those 700ms to respond you'll stacking up requests. You will eventually hit whatever the limit is with just one user. (although in certain cases the browser might protect you).
How to fix
I think 10 connections (if it's actually 10 connections, which is unclear to me) is very low. However you should refactor your code to avoid using setInterval. You should use something like Promise to keep track of when a requests ends before scheduling the new one so you prevent stacks of requests piling up. Keep as a rule of thumb that you should never use setInterval unless you have a very good reason to do so. It's almost always better to use some more intelligent scheduling.
You also might want to look into being more efficient with those requests, can you merge the call to check for messages and notifications?