On Tuesday, June 11, 2013 4:35:28 AM UTC+1, Markus wrote: > > How can I change the log-level at runtime *without restarting* or > creating new forks? > > I was thinking of having a controller that - with proper authentication- > allows a user to set the log level of a specific server, i.e. the server > the controller resides on. > Because we are in a threaded environment changing the log level of one > thread would not affect the others (correct me if I am wrong) so I was > thinking I write the new log level to a file. > To not waste time reading the file on each log request I was thinking > about setting a "global" persistent-across-requests variable that has the > time of the last check and if more than 10s elapsed it reads the file again > and sets the log level to the value in the file, if this is a valid one. > > The usecase is that let's say 20 servers are running and an API call may > return corrupted data or has a huge performance spike. So now I want to > turn on a logging level that shows me i.e. the queries that were executed, > and if that does not help, show even more data that is saved on "debug" > level. When there are no problems I want to restrict the logging to > "error" so no unnecessary logging takes place and wastes cpu/space. > > Changing it per server seems fiddly - how do you ensure that the request is handled by the server you expect it to ? I think the log level is a per process thing, but you have multiple processes so the problem remains. A file you can touch seems reasonable - Passenger etc. do something similar for monitoring changes to the tmp/restart.txt so it's probably a viable mechanism.
Fred -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/rubyonrails-talk/61833756-549b-4c2b-ac3c-138af81f1de0%40googlegroups.com?hl=en-US. For more options, visit https://groups.google.com/groups/opt_out.
