Date: Thu, 6 Apr 2023 09:08:43 -0700 From: Alan Somers <asomers@freebsd.org> To: FreeBSD CURRENT <freebsd-current@freebsd.org> Subject: textdumps are too slow Message-ID: <CAOtMX2j-Muz2uFE5YkYQ7atvQO9VrT4pDdvVnay-S%2BNi6rZNMQ@mail.gmail.com>
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I have servers with lots of RAM yet slow swap disks. So full crash dumps are too slow. Instead, I use textdumps, which are theoretically much faster. However, these servers also have about 10,000 threads apiece, so textdumps are also slow. They take tens of minutes. I have dual console setup: both serial and video. It seems to me that the speed of the textdump might be limited by the video system. So is there anyway to capture a textdump without printing everything to the console? textdump(4) implies that there isn't; you must print stuff to console in order to capture it, and you must capture in order to dump. Would somebody please tell me that I'm wrong? -Alan
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