Sorry, couldn't resist to that message subject :D
I'm working on some performance improvements for my application and
there is something I think is missing in Rails (as well as most other
frameworks) that I'd like to discuss here.
For this application, the user can select multiple filters when querying
a generic database. It is a live interface (like Google, for instance),
so whenever the user selects a new filter the results are automatically
updated. The request takes about 1s to deliver each search results but
it can take more on complex queries.
But the problem is that usually when setting filters it may happen that
the user will cancel the last request if it hasn't finished yet upon
insertion of a new filter.
This is a problem because Rails doesn't provide any facilities for web
servers that will inform you about that (the http connection close
event). Ideally, I'd like to be able to set up this Rails application to
behave this way (assuming my application is deployed as multi-thread
with Puma, for instance):
- when a connection has been closed (user canceled the request or
network was down, etc):
- if the route matches certain rules:
- kill that thread created to handle that connection
This would kill the PostgreSQL connection process for instance as any
further Ruby processing happening on that thread.
If I could do that I would be able to handle more requests using the
same resources as before.
Another useful feature to have built into Rails would be introducing
some monitoring settings. For instance, if any thread handling certain
route rules takes more than 3s the application could be able to handle
that case. The application would be able to decide among those actions,
for instance:
- kill the thread and render some response and status
- log the incident
- gracefully cancel the database request if this is possible or
gracefully interrupt some processing in place
Please let me know if the description above is not quite clear.
Cheers,
Rodrigo.
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