Hi Lutz That's brilliant - thank you very much.
I'm currently using the version 5.33.0 from EPEL (Rocky Linux 9). How should I replace/install the test package? Thanks in advance Jamie -----Original Message----- From: [email protected] <[email protected]> On Behalf Of Lutz Mader Sent: 02 May 2025 02:11 To: This is the general mailing list for monit <[email protected]> Subject: Re: More intelligent swap monitoring? Sorry Jamie, I'm late. Based on your suggestion I add a new test to "check system". check system $HOST # if memory usage > 75% then alert # if swap usage > 25% then alert if pagein > 10 pages then alert if pageout > 20 pages then alert if pagefault > 50 pages then alert A test package is available from https://bitbucket.org/lutzmad/monit/downloads/monit-vmstat-suse12-x64.tar.gz Let me know, if this will fix you problem, Lutz Appendage: ~/bin/monit status slesbuild Monit 5.35.0 uptime: 20m System 'slesbuild' status OK monitoring status Monitored monitoring mode active on reboot start load average [0.00] [0.00] [0.05] cpu 0.4%usr 3.3%sys 0.0%nice 2.1%iowait 0.0%hardirq 0.0%softirq 0.0%steal 0.0%guest 0.0%guestnice memory usage 492.2 MB [27.4%] swap usage 8.0 MB [0.4%] pagein count 0 [58] pageout count 0 [2050] uptime 5h 0m boot time Thu, 01 May 2025 21:02:12 filedescriptors 3264 [1.8% of 180992 limit] data collected Fri, 02 May 2025 02:03:04 Am 17.01.25 um 11:51 schrieb Jamie Burchell via This is the general mailing list for monit: > Hello > > I have reduced the amount of memory one of the services was consuming, > which > has abated the problem for now. However, there's still some swap being > used > so perhaps in a few days time the problem will come up again. > > Here's the output of /proc/meminfo as requested > > MemTotal: 7868472 kB > MemFree: 671568 kB > MemAvailable: 3261880 kB > Buffers: 0 kB > Cached: 893768 kB > SwapCached: 47448 kB > Active: 2661256 kB > Inactive: 1320396 kB > Active(anon): 2400964 kB > Inactive(anon): 800724 kB > Active(file): 260292 kB > Inactive(file): 519672 kB > Unevictable: 3072 kB > Mlocked: 0 kB > SwapTotal: 4194300 kB > SwapFree: 3923228 kB > Zswap: 0 kB > Zswapped: 0 kB > Dirty: 32 kB > Writeback: 0 kB > AnonPages: 3003564 kB > Mapped: 169140 kB > Shmem: 113804 kB > KReclaimable: 2124156 kB > Slab: 2540272 kB > SReclaimable: 2124156 kB > SUnreclaim: 416116 kB > KernelStack: 13712 kB > PageTables: 77444 kB > SecPageTables: 0 kB > NFS_Unstable: 0 kB > Bounce: 0 kB > WritebackTmp: 0 kB > CommitLimit: 8128536 kB > Committed_AS: 12257916 kB > VmallocTotal: 34359738367 kB > VmallocUsed: 31016 kB > VmallocChunk: 0 kB > Percpu: 1840 kB > HardwareCorrupted: 0 kB > AnonHugePages: 1378304 kB > ShmemHugePages: 0 kB > ShmemPmdMapped: 0 kB > FileHugePages: 0 kB > FilePmdMapped: 0 kB > CmaTotal: 0 kB > CmaFree: 0 kB > Unaccepted: 0 kB > HugePages_Total: 0 > HugePages_Free: 0 > HugePages_Rsvd: 0 > HugePages_Surp: 0 > Hugepagesize: 2048 kB > Hugetlb: 0 kB > DirectMap4k: 118624 kB > DirectMap2M: 8269824 kB > > Regards > Jamie > > > -- > > > -----Original Message----- > From: [email protected] > <[email protected]> On Behalf Of Lutz Mader > Sent: 15 January 2025 20:37 > To: This is the general mailing list for monit <[email protected]> > Subject: Re: More intelligent swap monitoring? > > Hello, > I have no useful examples, vmstat swap usage is si=0 and so=0 only. > The values calculated based on /proc/meminfo fit, on a Linux system. > > And the system status information seems to be useful. > >> Is it possible to configure Monit to alert of actual swapping >> out rather than swap file usage, or am I barking up the wrong tree? > > You are right, monit does not show the actual swap file IO (page in/out > data), the data based on the usage. > > monit status LINUX > Monit 5.34.0 uptime: 49d 0h 43m > > System 'LINUX' > status OK > monitoring status Monitored > monitoring mode active > on reboot start > load average [7.30] [8.60] [12.77] > cpu 0.8%usr 0.3%sys 14.7%nice 0.0%iowait > 0.0%hardirq 0.0%softirq 0.0%steal 0.0%guest 0.0%guestnice > memory usage 42.6 GB [11.3%] > swap usage 10.4 MB [0.5%] > uptime 61d 19h 43m > boot time Thu, 14 Nov 2024 14:54:46 > filedescriptors 16800 [0.2% of 6815744 limit] > data collected Wed, 15 Jan 2025 10:37:52 > > The vmstat data. > > Swap > si: Amount of memory swapped in from disk (/s). > so: Amount of memory swapped to disk (/s). > > vmstat > procs -----------memory---------- ---swap-- -----io---- -system-- > ------cpu----- > r b swpd free buff cache si so bi bo in cs us sy > id wa st > 7 0 10624 273713168 811688 87684144 0 0 69 40 0 0 11 > 1 88 0 0 > > vmstat -s > 395130516 K total memory > 120558732 K used memory > 90364732 K active memory > 11131200 K inactive memory > 274571784 K free memory > 811824 K buffer memory > 88984004 K swap cache > 2095100 K total swap > 10624 K used swap > 2084476 K free swap > 1313872869 non-nice user cpu ticks > 1427185498 nice user cpu ticks > 247910673 system cpu ticks > 22633904247 idle cpu ticks > 6802373 IO-wait cpu ticks > 0 IRQ cpu ticks > 2608560 softirq cpu ticks > 0 stolen cpu ticks > 17687866581 pages paged in > 10300491953 pages paged out > 1345 pages swapped in > 6655 pages swapped out > 3444460676 interrupts > 416044891 CPU context switches > 1731592487 boot time > 273618695 forks > > The values based on /proc/meminfo. > > cat /proc/meminfo > MemTotal: 395130516 kB > MemFree: 275604548 kB > MemAvailable: 353323016 kB > Buffers: 811800 kB > Cached: 85849340 kB > SwapCached: 892 kB > Active: 89256636 kB > Inactive: 11124384 kB > Active(anon): 18733260 kB > Inactive(anon): 3398376 kB > Active(file): 70523376 kB > Inactive(file): 7726008 kB > Unevictable: 975348 kB > Mlocked: 975348 kB > SwapTotal: 2095100 kB > SwapFree: 2084476 kB > Dirty: 468 kB > Writeback: 0 kB > AnonPages: 14695184 kB > Mapped: 2965708 kB > Shmem: 8423756 kB > Slab: 8029800 kB > SReclaimable: 2699580 kB > SUnreclaim: 5330220 kB > KernelStack: 70320 kB > PageTables: 421232 kB > NFS_Unstable: 0 kB > Bounce: 0 kB > WritebackTmp: 0 kB > CommitLimit: 199660356 kB > Committed_AS: 26151808 kB > VmallocTotal: 34359738367 kB > VmallocUsed: 0 kB > VmallocChunk: 0 kB > HardwareCorrupted: 0 kB > AnonHugePages: 0 kB > ShmemHugePages: 0 kB > ShmemPmdMapped: 0 kB > HugePages_Total: 0 > HugePages_Free: 0 > HugePages_Rsvd: 0 > HugePages_Surp: 0 > Hugepagesize: 2048 kB > DirectMap4k: 37410524 kB > DirectMap2M: 286273536 kB > DirectMap1G: 80740352 kB > > The values are used to calculate the monit swap data. > > in src/process/sysdep_LINUX.c > > used_system_memory_sysdep(SystemInfo_T *si) > > // Swap > if (! (ptr = strstr(buf, "SwapTotal:")) || sscanf(ptr + 10, > "%llu", &swap_total) != 1) { > Log_error("system statistic error -- cannot get swap > total amount\n"); > goto error; > } > if (! (ptr = strstr(buf, "SwapFree:")) || sscanf(ptr + 9, > "%llu", &swap_free) != 1) { > Log_error("system statistic error -- cannot get swap > free amount\n"); > goto error; > } > si->swap.size = swap_total * 1024; > si->swap.usage.bytes = (swap_total - swap_free) * 1024; > > The question is, > how does the /proc/meminfo output data look like on your system. > > Are some examples available, based on vmstat and the /proc/meminfo data. > > Lutz > > > Am 14.01.25 um 12:10 schrieb Jamie Burchell via This is the general > mailing list for monit: >> Hi >> >> >> >> I currently use Monit to alert me if swap usage is over > 20%. This works >> most of the time, but I have a particularly stubborn VM currently which >> appears to like to add data to swap and then not touch it. Using vmstat >> shows there are either no, or maybe the odd non-zero swap in operation >> and >> no swap outs. Is it possible to configure Monit to alert of actual >> swapping >> out rather than swap file usage, or am I barking up the wrong tree? >> >> >> >> Thanks in advance! >> >> Jamie >> > >
