Date: Sat, 20 May 2023 19:04:56 +0200 From: Solar Designer <solar@...nwall.com> To: john-users@...ts.openwall.com Subject: Re: excessive memory usage when running john - 90 gigabytes 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. Please try a newer build linked from the "Download Windows Build" badge in README.md at https://github.com/openwall/john Alexander
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