Date: Sun, 29 Mar 2015 11:51:59 +0200 From: Miroslav Lachman <000.fbsd@quip.cz> To: trasz@FreeBSD.org Cc: freebsd-stable Stable <freebsd-stable@FreeBSD.org> Subject: Re: rctl logs swapuse even if swap is empty Message-ID: <5517CB3F.5070004@quip.cz> In-Reply-To: <550F3729.5020208@quip.cz> References: <550CBCE3.6040908@quip.cz> <550F3729.5020208@quip.cz>
next in thread | previous in thread | raw e-mail | index | archive | help
Hello Edward, I am trying to contact you directly, because you are the author of RCTL. Can you shed some light on this issue? I still have a problem with understanding this swapuse issue. Now I have a monitoring of all values reported by "rctl -u jail:fox" and there are values like 60GB of swapuse. It doesn't make sense to me. If this is a bug, I can send you a CSV log file, od ODS (LibreOffice Calc) with graph, or MRTG graphs of all values. Miroslav Lachman https://lists.freebsd.org/pipermail/freebsd-stable/2015-March/082019.html Miroslav Lachman wrote on 03/22/2015 22:42: > Miroslav Lachman wrote on 03/21/2015 01:35: >> I tried RCTL for the first time, so maybe it is error on my side. > > [...] > >> Both jails are small webservers with PHP + Apache. They do not use much >> memory and they really do not user any swap space. (according to top and >> swapinfo) >> >> >> # swapinfo -h >> Device 1K-blocks Used Avail Capacity >> /dev/mirror/gm0s1b 16777216 0B 16G 0% >> >> >> # rctl -hu jail:fox | grep swap >> swapuse=0 >> >> >> Processes in both jails are logged as using more than 32MB of swap: >> >> Mar 21 01:18:55 neon kernel: rctl: rule "jail:fox:swapuse:log=33554432" >> matched by pid 20783 (httpd), uid 80, jail fox >> Mar 21 01:18:55 neon kernel: rctl: rule "jail:fox:swapuse:log=33554432" >> matched by pid 20787 (httpd), uid 80, jail fox >> Mar 21 01:18:58 neon kernel: rctl: rule "jail:fox:swapuse:log=33554432" >> matched by pid 19207 (httpd), uid 80, jail fox >> Mar 21 01:18:58 neon kernel: rctl: rule "jail:fox:swapuse:log=33554432" >> matched by pid 20790 (sh), uid 0, jail fox >> Mar 21 01:18:58 neon kernel: rctl: rule "jail:fox:swapuse:log=33554432" >> matched by pid 20792 (sh), uid 0, jail fox >> Mar 21 01:18:58 neon kernel: rctl: rule >> "jail:olymp:swapuse:log=33554432" matched by pid 20793 (sh), uid 0, jail >> olymp >> Mar 21 01:18:58 neon kernel: rctl: rule >> "jail:olymp:swapuse:log=33554432" matched by pid 20795 (sh), uid 0, jail >> olymp >> >> Is it expected? I do not think so. >> Or am I doing something wrong with rctl? > > This is really strange. FOP (Java application) in jail is failing unless > rctl swapuse is set to 7GB or more. > > Does swapuse means anything completely different than what is swapinfo > or top reporting? > > The same web services with FOP is running completely fine on real server > with 2GB of physical RAM installed and less than 5GB of swap partition > (swap is empty). But it is not working in jail if RCTL is set to > swapuse:deny=4GB or memoryuse:deny=4GB. > > Can somebody explain it? > > Miroslav Lachman > _______________________________________________ > freebsd-stable@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-stable > To unsubscribe, send any mail to "freebsd-stable-unsubscribe@freebsd.org" >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?5517CB3F.5070004>