On 2017-07-19 6:58 PM, Mike Hommey wrote:
I don't understand why that would be, but if so it should show in
crashstats as fewer small OOMs on these devices. Does the data actually
show that?
I don't know. Can that be filtered?
I'm not sure I'm answering the right question, but searching through
crash reports from Firefox 53/54 users over the last 30 days, I see
small OOMs from both 32- and 64-bit users, regardless of available
physical or virtual memory or browser uptime. But small OOMs are always
the top crash (10% or more) for 32-bit users. Small OOMs are about 6%
for 64-bit users with <= 2 GB, 3% with <= 4 GB, and 1% for > 4 GB.
Here is a search for 32-bit crash reports with <= 2 GB physical memory:
https://is.gd/205aNb
And 64-bit crash reports with <= 2 GB physical memory:
https://is.gd/AezNaZ
But I see a lot of strange crash reports, such as small OOMs from 64-bit
users within 10 seconds of starting Firefox. Or small OOMs from 64-bit
users with 9 GB of available physical memory and 128 TB of available
virtual memory.
I'm not saying they shut down because of memory. I'm saying a surprising
lot of people have browser sessions that don't last more than 5 minutes
(I've heard multiple times in the past years that we found that out from
our data).
Those people are not going to see OOM.
Users with only 2 GB and 5 minute browser sessions would probably have a
faster user experience with 32-bit Firefox than with 64-bit, but how do
we weigh that experience versus the security benefits of ASLR?
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