On Sat, 29 Aug 2020 at 10:07, Ben Kochie <[email protected]> wrote: > I think that PR link is incorrect. > > Yes, I think we should consider dropping 32-bit official builds. Unless we > can reduce the amount of mmap'd data. >
The amount of mmapping we do is only going to increase. > > One thing I noticed when running on a 32-bit machine a while back was that > the mmap'd data is mapped multiple times for different OS threads. Setting > GOMAXPROCS=1 > helped, but only a little. > That doesn't sound right, we do map some files more than once (particularly during compaction) but not per thread. > There was some discussion about doing mmap on demand, but there was not > enough interest in 32-bit to consider spending the time. > Even if all that complexity was added and the lack of predictable performance was acceptable, you'd still be limited to rather small data sizes. I don't think there's much point complicating the codebase for the sake of a Prometheus that can't handle more than a few hundred MB of data. Brian > > On Fri, Aug 28, 2020 at 3:05 PM Julien Pivotto <[email protected]> > wrote: > >> Dear developers, >> >> Based on this comment from Brian, should we stop providing official 32 >> bit builds >> of Prometheus? >> >> > 2.19 requires more virtual memory than previous versions, you need a >> > 64bit machine. 32bit system are generally not supported as we use mmap >> > a lot, if you want to try to get it to work you can but we don't >> > promise anything there as trying to support 32bit systems would >> > cripple things for the vast majority of our users on 64bit systems. I >> > can only suggest looking at Prometheus 1.x, which did not use mmap. >> >> https://github.com/prometheus/prometheus/pull/7686#issuecomment-682534007 >> >> If we build them but not recommend them, that seems like a waste of time >> and resources. >> >> -- >> Julien Pivotto >> @roidelapluie >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Prometheus Developers" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/prometheus-developers/20200828130516.GA1428921%40oxygen >> . >> > -- > You received this message because you are subscribed to the Google Groups > "Prometheus Developers" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/prometheus-developers/CABbyFmrkuKc-VHAxydAHEO3PwA95V_tBu0WuuUQ-7c654mS%2Bzg%40mail.gmail.com > <https://groups.google.com/d/msgid/prometheus-developers/CABbyFmrkuKc-VHAxydAHEO3PwA95V_tBu0WuuUQ-7c654mS%2Bzg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- Brian Brazil www.robustperception.io -- You received this message because you are subscribed to the Google Groups "Prometheus Developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-developers/CAHJKeLqHT724Uj9%3D7KiWZg%3DWuRwEaaOFZEZxb6TPF-gD9JkuMw%40mail.gmail.com.
