Hi Gonzalo, I highly recommend using https://github.com/rfjakob/earlyoom instead of waiting for OOM to kick in.
Cheers, Edgar On Wed, Jul 5, 2023 at 11:24 AM Gonzalo Tornaria <torna...@gmail.com> wrote: > This slowly and inexorably goes on. Computing `sqrt(T2)` leaks 32 bytes > each and every time (asymptotically). > > Found by a student who, through no fault of himself, brought down our > server (unable to ssh in until the OOM triggered -- but since the leak is > slow it takes a while to trash 16G of swap). > > === > $ cat memleak.py > from sage.all import sqrt > T2 = sqrt(2) > import psutil > ps = psutil.Process() > base = ps.memory_info().rss > for a in range(1, 10): > for b in range(num := 100_000): > C = sqrt(T2) > mem = ps.memory_info().rss - base > print(f"{mem/1e6 :.2f} MB ({mem/a/num :.2f} bytes/iter)") > $ sage memleak.py > 2.70 MB (27.03 bytes/iter) > 5.95 MB (29.74 bytes/iter) > 9.19 MB (30.64 bytes/iter) > 12.44 MB (31.09 bytes/iter) > 15.41 MB (30.82 bytes/iter) > 18.65 MB (31.09 bytes/iter) > 21.90 MB (31.28 bytes/iter) > 25.14 MB (31.43 bytes/iter) > 28.39 MB (31.54 bytes/iter) > === > > Replace the 10 in the outer loop by something larger at your own peril > (each outer iteration will take 3.2M so 10_000 should kill a laptop in an > hour or two). > > This is with system sagemath 10.0 but it also happens with 9.6, 9.7, 9.8 > and 10.0 in cocalc.com. > > Best, > Gonzalo > > -- > You received this message because you are subscribed to the Google Groups > "sage-devel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-devel+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/sage-devel/26ec41f7-c591-48b6-ab57-463b8b8a1675n%40googlegroups.com > <https://groups.google.com/d/msgid/sage-devel/26ec41f7-c591-48b6-ab57-463b8b8a1675n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sage-devel/CA%2BiQ7x47X70AMHpkzZ10sL7UQs0zPLvjHhAU-Lc2cwjeWGPiVA%40mail.gmail.com.