Date: Thu, 2 Jun 2016 20:52:38 +0300 From: Artem Kuchin <artem@artem.ru> To: FreeBSD Questions Mailing List <freebsd-questions@freebsd.org> Subject: rctl memory usage count and swap Message-ID: <60ecb4a9-c3c5-6bfd-e032-21fa5f03c85a@artem.ru>
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Hello freebsd 10.2 I have apache in jail, each apache in running under its own user, so, i have many user in one jail and many httpd processed started under that users. I wanted to limit memory usage per user and disable swap for all of them. So, i use rctl I try such rules vmemoryuse:log=1g swapuse:log=0 Now two problem appeared immediately 1) VMEMORYUSE I see messages in log file like this kernel: rctl: rule "user:17032:vmemoryuse:log=1073741824" matched by pid 40360 (httpd), uid 17032, jail XXX So, it seems like user overused memory, i check # rctl -u user:17032 cputime=37 datasize=368640 stacksize=0 coredumpsize=0 memoryuse=329007104 memorylocked=0 maxproc=10 openfiles=320 vmemoryuse=4147863552 pseudoterminals=0 swapuse=6148096 nthr=9 msgqqueued=0 msgqsize=0 nmsgq=0 nsem=0 nsemop=0 nshm=0 shmsize=0 wallclock=28270 pcpu=0 Aha, seems like the user used 4G of virtual memory and 329M of real memory No lets see its processes 17032 2213 1 0 21 0 446372 27808 select SsJ - 0:02.47 /usr/local/sbin/httpd 17032 30173 2213 0 20 0 450468 39644 accept IJ - 0:00.29 /usr/local/sbin/httpd 17032 39611 2213 0 20 0 450468 37160 accept IJ - 0:00.06 /usr/local/sbin/httpd 17032 39612 2213 0 20 0 450468 36712 accept IJ - 0:00.05 /usr/local/sbin/httpd 17032 39613 2213 0 20 0 450468 36608 accept IJ - 0:00.06 /usr/local/sbin/httpd 17032 39614 2213 0 20 0 450468 36624 accept IJ - 0:00.05 /usr/local/sbin/httpd 17032 39617 2213 0 20 0 450468 37144 accept IJ - 0:00.03 /usr/local/sbin/httpd 17032 39618 2213 0 20 0 450468 36268 accept SJ - 0:00.04 /usr/local/sbin/httpd 17032 39619 2213 0 20 0 450468 36432 accept IJ - 0:00.05 /usr/local/sbin/httpd 17032 39621 2213 0 20 0 450468 36332 accept IJ - 0:00.04 /usr/local/sbin/httpd 17032 39623 2213 0 20 0 450468 36988 accept IJ - 0:00.06 /usr/local/sbin/httpd 17032 39624 2213 0 20 0 450468 36212 accept IJ - 0:00.03 /usr/local/sbin/httpd 17032 39626 2213 0 20 0 450468 36544 accept IJ - 0:00.04 /usr/local/sbin/httpd 17032 39627 2213 0 20 0 450468 37360 accept IJ - 0:00.06 /usr/local/sbin/httpd 17032 39628 2213 0 20 0 450468 36772 accept IJ - 0:00.04 /usr/local/sbin/httpd 17032 39633 2213 0 20 0 450468 34972 accept IJ - 0:00.04 /usr/local/sbin/httpd 17032 39634 2213 0 20 0 450468 36104 accept IJ - 0:00.03 /usr/local/sbin/httpd 17032 39635 2213 0 20 0 450468 35784 accept IJ - 0:00.03 /usr/local/sbin/httpd 17032 39637 2213 0 20 0 450468 36232 accept IJ - 0:00.04 /usr/local/sbin/httpd 17032 39638 2213 0 20 0 450468 36620 accept IJ - 0:00.04 /usr/local/sbin/httpd 17032 39645 2213 0 20 0 450468 36084 accept IJ - 0:00.04 /usr/local/sbin/httpd 17032 39649 2213 0 20 0 450468 36356 accept SJ - 0:00.04 /usr/local/sbin/httpd 17032 39652 2213 0 20 0 450468 36156 accept SJ - 0:00.04 /usr/local/sbin/httpd 17032 39653 2213 0 20 0 450468 35436 accept SJ - 0:00.03 /usr/local/sbin/httpd 17032 39655 2213 0 20 0 450468 37752 accept SJ - 0:00.04 /usr/local/sbin/httpd 17032 39657 2213 0 20 0 450468 35664 accept IJ - 0:00.03 /usr/local/sbin/httpd 17032 39661 2213 0 20 0 450468 36228 accept SJ - 0:00.04 /usr/local/sbin/httpd As you see the virtual memory is 100% shared and RSS is at most 930M Where rctl gets its number? memoryuse=329007104 vmemoryuse=4147863552 2) swapuse:log=0 This rule create strange problems (when used with deny) Jun 2 20:24:57 omni kernel: rctl: rule "user:17094:swapuse:log=0" matched by pid 27553 (httpd), uid 17094, jail XXXX Jun 2 20:24:57 omni kernel: kern.ipc.maxpipekva exceeded; see tuning(7) As you see from rctl -u it shows swapuse=6148096 but! # swapinfo Device 1K-blocks Used Avail Capacity /dev/mirror/swap 4194300 0 4194300 0% So, not swap is really used But even if i do swapuse:log=300M i get the same error And what maxpopekva has to do with it? Is rctl really usable in 10.2 ?
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