Hi Pol, Thanks for trying it again with threadsafe disabled and reporting back!
On Mon, Nov 14, 2011 at 4:32 AM, Pol <[email protected]> wrote: > Hi Brian, > > It helps, it's now at ~5s instead, but still at least 2x slower than > on the 2.5 runtime. > > So on December 1st, the 50% discount for front-instances is gone. The > idea is to compensate by switching to Python 2.7 with multithreading, > but it looks like at this point it's a lose-lose situation: it runs > more requests at the same time, but they take longer. We're mid- > November already, do you guys think you'll have all of this working > perfectly within 2 weeks? No, the issues with concurrent requests won't be fixed by the end of November. But note that concurrent requests will *not* improve the utilization of CPU-bound requests. Running multiple threads on the same CPU just proportionally slows each thread down. > The 1.6 SDK which actually allows to run 2.7 > locally was just released, so we're only starting to test now. Seems > to me deferring the payment change 1 more month to January 1st 2012 > wouldn't hurt :) You can send your billing-related suggestions to App Engine's Engineering Directory, Peter Magnusson ([email protected]). Thanks! Cheers, Brian > On Nov 12, 10:09 pm, Brian Quinlan <[email protected]> wrote: >> Hi Pol, >> >> Thanks for getting back to me. >> >> On Sun, Nov 13, 2011 at 4:50 PM, Pol <[email protected]> wrote: >> > Hi Brian, >> >> > threadsafe is "true" >> >> There is a known issue where concurrent requests (enabled with >> threadsafe) can be much slower than non-concurrent requests, >> especially if the request is CPU-bound. >> >> You might want to set threadsafe to "false" and see if that fixes the >> problem. >> >> Cheers, >> Brian >> >> >> >> >> >> >> >> > Here's an example password_hash for an original 8 characters password: >> >> > $2a$04$cbM2uHwDphIG3jFFRpq1mui5aVjevnDUwhvQ77S/WG/qvJMpiXAL6 >> >> > On Nov 12, 6:58 pm, Brian Quinlan <[email protected]> wrote: >> >> Hi Pol, >> >> >> On Sun, Nov 13, 2011 at 1:48 PM, Pol <[email protected]> wrote: >> >> > Hi, >> >> >> > Since switching to 2.7 runtime, logging in tohttp://www.everpix.com >> >> > went from about a second to anywhere from 15s to 60s. I tracked it >> >> > down to this single password checking line: >> >> >> > from bcrypt import bcrypt >> >> > bcrypt.hashpw(password, self.password_hash) == self.password_hash >> >> >> What value are you using for "threadsafe" in your app.yaml? >> >> >> How large is self.password_hash? >> >> >> Cheers, >> >> Brian >> >> >> > This comes from "a native Python implementation of the py-bcrypt >> >> > package fromhttp://www.mindrot.org/projects/py-bcrypt/"; grabbed from >> >> > here:https://github.com/erlichmen/py-bcrypt. >> >> >> > So what's happening here and how can we fix this? >> >> >> > Thanks, >> >> >> > - Pol >> >> >> > -- >> >> > You received this message because you are subscribed to the Google >> >> > Groups "Google App Engine" 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 >> >> > athttp://groups.google.com/group/google-appengine?hl=en. >> >> > -- >> > You received this message because you are subscribed to the Google Groups >> > "Google App Engine" 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 >> > athttp://groups.google.com/group/google-appengine?hl=en. > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" 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/google-appengine?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Google App Engine" 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/google-appengine?hl=en.
