Date: Sat, 20 May 2023 10:12:58 -0700 From: jeff <jeff@...funit.com> To: john-users@...ts.openwall.com Subject: Re: excessive memory usage when running john - 90 gigabytes On 5/20/2023 10:04, Solar Designer wrote: > On Fri, May 19, 2023 at 05:01:16PM -0700, jeff wrote: >> I am running john-1.9.0-jumbo-1-win64 on a windows 10 pro computer. >> The computer has 128gb of ram and an amd epyc processor with 16 cores >> and 32 threads. >> I am currently trying to find 4 descrypt passwords with john. >> >> When I run john, and looking at the task manager performance tab, the >> system is using 99.3 gigabytes of memory. >> When i stop john, the system is using about 8gb or memory. >> The task manager process view tab shows john using 65.0 megabytes of memory. >> >> I am quite curious what part of john is using 90 gigabytes of ram, and >> why it is using so much memory. > We'll need to know more about your invocation of john to tell. For > example, are you running it on a wordlist this large, which could be > getting memory-mapped? JtR was overzealous with memory-mapping of > wordlists, which we've since corrected, but I don't know how exactly > that would have manifested on Windows. I am running it on a very large wordlist, rockyou2021, which is 98 gigabytes. I suspect it is getting memory mapped.
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