Here is similar proposal: https://github.com/joyent/node/issues/2395
On Wed, 6 Jun 2012 11:42:30 -0300, Jose F. Romaniello <[email protected]> wrote: > this might sound very stupid,... but wouldn't be useful to have a parameter > or something to set the max milliseconds a tick can take? > > node myapp.js --tick-timeout 60000 > > this means if you have a while(true), or something than takes more than a > minute fail!, raise an exception in the application so you can log it on > the process "uncaughException" event. and something like "forever" will > restart the process. > Maybe there is no way to implement this right now, or maybe there is > something like this already... > > cheers, > > 2012/6/6 Matt <[email protected]> > > > This doesn't change the fact that external monitoring is still going to be > > better. > > > > On Wed, Jun 6, 2012 at 1:27 AM, Jeff Willden <[email protected]>wrote: > > > >> Some readers are not getting the point. When running node in a > >> production environment, it is assumed that the app has no blatant > >> infinite loops. Yes, that would block the event loop and prevent > >> anything from running, but if you've done that, you should take Intro > >> to Node 101, or maybe the remedial class... > >> > >> In a production environment, we're concerned about long running events > >> that might be blocking the event loop. If your code is doing database > >> calls, then it's yielding to the event loop. No problem there. But > >> then if you run a bunch of processing on that using synchronous code, > >> and that processing takes longer than whatever threshold you give in > >> the code I posted, then it will tell you. We're not concerned as much > >> about overall request time, because during the time it's processing > >> the request, it's probably yielding. For newbies, yielding means that > >> you perform some action and pass it a callback, and when that action > >> is done, it calls the callback. Users see this all over in node code. > >> That doesn't necessarily mean it yields though... > >> > >> Case scenario: we had a bunch of db calls to load data that would be > >> processed (sorted, organized, transformed, etc) and converted to json > >> and then fed to the client. That db calls yield each time a db call is > >> made. No problem. The processing was all linear programming. Problem: > >> for large data sets it was taking over our threshold. When you have > >> more concurrent requests than the number of instances of node (we're > >> using cluster) then every instance is busy and your server goes > >> unresponsive. BAD news. We had to change some calls to accept a > >> callback, and then it would call the callback inside a > >> process.nextTick(). That made the code async, and the problem > >> disappeared. We could ramp up with hundreds of users and the users > >> with only a little data got served fast, the users with lots of data > >> not quite as fast, but at least they weren't blocking other users. > >> > >> People often misunderstand how to build server-side apps with Node. > >> With async coding in node, you can easily outmatch performance for > >> lots of other environments. With synchronous code in node, you can > >> easily have a dead server. Node is great, but it's oh-so-easy to shoot > >> yourself in the foot. Gotta be really careful about excessive runs of > >> synchronous code. > >> > >> -- > >> Job Board: http://jobs.nodejs.org/ > >> Posting guidelines: > >> https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines > >> You received this message because you are subscribed to the Google > >> Groups "nodejs" group. > >> To post to this group, send email to [email protected] > >> To unsubscribe from this group, send email to > >> [email protected] > >> For more options, visit this group at > >> http://groups.google.com/group/nodejs?hl=en?hl=en > >> > > > > -- > > Job Board: http://jobs.nodejs.org/ > > Posting guidelines: > > https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines > > You received this message because you are subscribed to the Google > > Groups "nodejs" group. > > To post to this group, send email to [email protected] > > To unsubscribe from this group, send email to > > [email protected] > > For more options, visit this group at > > http://groups.google.com/group/nodejs?hl=en?hl=en > > > > -- > Job Board: http://jobs.nodejs.org/ > Posting guidelines: > https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines > You received this message because you are subscribed to the Google > Groups "nodejs" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/nodejs?hl=en?hl=en -- Job Board: http://jobs.nodejs.org/ Posting guidelines: https://github.com/joyent/node/wiki/Mailing-List-Posting-Guidelines You received this message because you are subscribed to the Google Groups "nodejs" group. 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