Search results for query: swappiness

In my experience I have found disk (partition?) based swapping to be less than ideal. I don't mean in a performance perspective, more a systems administration perspective. I've generally converted all my systems that were partition/disk to file-on-disk swap method instead. Consider the...

In my exhaustive testing over the decades, both Windows and Linux does not reliably swap _out_ data back into RAM. This is one of the important details why I not only monitor for any usage of swap at all on anything I care about (and alert if enough swap is used, >10%), I also have periodic swap...

I wrote a little bit about SWAP monitoring here. If you use disk based SWAP anyways I'd recommend ZSWAP. Note that swapon is basically the "human readable" version of cat /proc/swaps and with sysctl vm.swappiness you don't have to use a pipe and can also set it directly.

...Type Size Used Priority /dev/nvme0n1p2 partition 5676028 0 -2 /dev/zram0 partition 4194300 175616 root@proxmox ~ > sysctl -a | grep swap vm.swappiness = 1

...data is not in RAM I've been working with Proxmox VE clusters for over 13 years now, and I have seen nothing but upsides to setting vm.swappiness to 0, while still having some amount of swap capacity available for emergencies. Additionally, using tools like zram is yet another band-aid...

...0 The only file that modifies rpf values after the default ones from systemd/Debian & Proxmox # cat /usr/lib/sysctl.d/zzz-nvs.conf vm.swappiness=100 net.ipv4.conf.all.rp_filter = 0 net.ipv4.conf.default.rp_filter = 0 net.ipv4.conf.*.rp_filter = 0 Edit : sysctl -a and sysctl --system in...

...Starting Backup of VM 157502 (qemu) Jan 24 02:01:01 pve25 CRON[2420196]: (root) CMD (if which fa-pve >/dev/null 2>&1; then fa-pve set-qemu-swappiness >/dev/null ; fi) Jan 24 02:01:12 pve25 vzdump[2026008]: INFO: Finished Backup of VM 157502 (00:00:18) Jan 24 02:01:12 pve25 vzdump[2026008]...

Thanks Does the parameter vm.swappiness=10 the origin of my issue ?

...configured sysctl like this: vm.dirty_bytes = 268435456 vm.dirty_background_bytes = 134217728 This didn't help either. I configured vm.swappiness to 0, 1 and 10. None of it helped. The only thing that did help is running zstd through nocache using this wrapper: root@pve:~# cat...

...= 2 fs.protected_regular = 2 # ==================== MEMORY MANAGEMENT ==================== # Virtual memory settings vm.swappiness = 30 vm.vfs_cache_pressure = 100 vm.min_free_kbytes = 2048 vm.dirty_ratio = 20 vm.dirty_background_ratio = 10 vm.dirty_expire_centisecs = 3000...

Ich würde wie oben erwähnt ZRAM einrichten und bei Bedarf swappiness anpassen. Du kannst deine Theorie ganz einfach testen indem du den SWAP mit swapoff -a deaktivierst. Alles weitere ist bereits verlinkt und gesagt.

...schau mal hier. Swappen muss nichts schlimmes sein. Ich nutze und empfehle zB. ZRAM. Wenn du swapping limitieren möchtest kannst du die swappiness verringern. Da dein KSM sharing sehr hoch ist und KSM normalerweise erst bei 80% greift, zeigt dass, dass du schon viel höhere Auslastung hattest...

Setze "swappiness" auf Null. https://pve.proxmox.com/wiki/ZFS_on_Linux#zfs_swap - auf derselben Seite wie bereits oben verlinkt. Allerdings würde ich das nicht machen, sondern eine kleine Menge präsent lassen. Das basiert lediglich auf meiner persönlichen Wahrnehmung. Ärgerlicherweise kann...

...shows up as higher Proxmox IO delay and higher load average. Giving each LXC even 512 MB of swap prevents reclaim storms, preserves cache, and reduces latency, often lowering total IO despite some swapping. Better options: keep small swap plus low swappiness, or use zswap/zram to cut SSD writes.

...starting from 8.1(see the changelog [1] for more details) will by default allocate 10% of the available memory to the ARC. > reduce swappiness to a 0-10 (optional, mine is back to 60 and no issues since reducing arc) This is not as simple as it sounds, the effect of swappiness heavily...

...with ZFS: reduce ZFS arc to maybe 1/3 or 1/4 of RAM (https://pve.proxmox.com/wiki/ZFS_on_Linux#sysadmin_zfs_limit_memory_usage) reduce swappiness to a 0-10 (optional, mine is back to 60 and no issues since reducing arc) Sure this won't result in some incredible ZFS performance, but at least...

...wie gut ich das jetzt optimieren konnte. Ein DebianVM erstellt auf dem ZFS Mirror ja ein LVM, wobei zB 2G als Swap konfiguriert sind. Swappiness ist 60 im Standard, ein Server läuft prima mit 10. Besser ist gar kein SWAP. Log Files sollten nicht steting mit Infos, Warnungs beschrieben...

...Reporting mag keine Lücken. Der Server langweilt sich bei 50% RAM Auslastung und 0% ... 0.2% IO delay, kein SWAP vergeben. OPNSense schreibt stetig: Log und RRD deaktivieren. Sonst alles ohne SWAP konfigurieren wenn's geht, oder swappiness=10. Alles mit PBS sichern, auf viele verschiedene...

...21Mi 204Mi 2.5Gi Swap: 7.5Gi 1.3Gi 6.2Gi I did swapoff -a and I could login instantly via Web gui. (my swappiness is 10) I changed it to 1. If I turn swap back on, it is getting filled again, the IO load spikes and I cannot login via GUI: free -h...

...if a single disk is under load, right? EDIT: Suspecting the issue was swap related: I reduced the ZFS arc from 4GB to 3GB, set sysctl vm.swappiness=1 swapoff -a (this took a few minutes to complete) swapon -a Then I re-ran my IO intensive task and while the IO delay in the GUI showed...