Date: Mon, 2 Aug 2021 21:58:08 +0200 From: Thomas Steen Rasmussen via jail <jail@freebsd.org> To: Mark Johnston <markj@freebsd.org> Cc: Michael Gmelin <freebsd@grem.de>, jail@freebsd.org, Konstantin Belousov <kostikbel@gmail.com> Subject: Re: POSIX shared memory, jails, and (lack of) limits Message-ID: <51d4462f-1958-3380-9973-365e018e533f@gibfest.dk> In-Reply-To: <YQhKEDWzn01zQyyO@nuc> References: <YQf5ZNUV6hVm5gOK@kib.kiev.ua> <EF1E80B4-684B-4698-A971-F637F0D726B4@grem.de> <YQhBf17Sgwx91l/z@kib.kiev.ua> <YQhKEDWzn01zQyyO@nuc>
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On 8/2/21 9:40 PM, Mark Johnston wrote: > Cyril has written a few patches for racct, including one which includes > POSIX shared memory objects in rctl's "nshm" and "shmsize" resources, > which currently only apply to SysV shm objects: > https://reviews.freebsd.org/D30775 > We plan to get them committed in the next couple of weeks. > Hello, I haven't looked at it for a bit, but the last time I tried to use sysutils/jail_exporter to get graphs for jail resource usage the graphs for Postgres jails were hilariously wrong, which I believe I tracked down to shared memory being counted more than once. I gave up trying to figure out how to fix it and just lived with Grafana telling me a postgres jail on a 128gb jailhost used 900gb of memory. But it sounds like the above might fix this? Thanks! Best regards, Thomas Steen Rasmussen
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