Hello! This is an .so file in libc6. Try using ldd on monit's binary!
Idézem/Quoting Jamie Burchell via This is the general mailing list for monit <[email protected]>:
Hi Luz Unfortunately, I'm unable to run the test binary on my VM: monit: error while loading shared libraries: libnsl.so.1: cannot open shared object file: No such file or directory Regards Jamie -----Original Message----- From: [email protected] <[email protected]> On Behalf Of Lutz Mader Sent: 02 May 2025 16:45 To: This is the general mailing list for monit <[email protected]> Subject: Re: More intelligent swap monitoring? Hello Jamie, this is a simple tgz Package, feel free to unpack the package and copy the bin/monit file to a proper place. But keep in mind, this is a test package only, based on Monit 5.35.0 for Linux x86_64.That's brilliant - thank you very much.The official fix will became available with 5.36.0, maybe. The data should be similar to the data from "vmstat -s" and "vmstat 30" (see your monitrc file, option "set daemon 30"). Keep in mind, this is for testing/validation purpose only, Lutz Am 02.05.25 um 15:14 schrieb Jamie Burchell via This is the general mailing list for monit: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
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