Systemd-swap: 4.1.0 ์ดํ›„์— ์™„์ „ํžˆ ์ž‘๋™ํ•˜๋Š”์ง€ ํ™•์‹คํ•˜์ง€ ์•Š์Œ

์— ๋งŒ๋“  2020๋…„ 06์›” 08์ผ  ยท  6์ฝ”๋ฉ˜ํŠธ  ยท  ์ถœ์ฒ˜: Nefelim4ag/systemd-swap

์•ˆ๋…•ํ•˜์„ธ์š”, ์ €๋Š” Archlinux๋ฅผ ์‚ฌ์šฉํ•˜๊ณ  ์–ด์ œ systemd-swap์„ 4.1.0์œผ๋กœ ์—…๋ฐ์ดํŠธํ–ˆ์Šต๋‹ˆ๋‹ค. ์—…๋ฐ์ดํŠธ ํ›„ ์˜ˆ์ƒ๋Œ€๋กœ ์ž‘๋™ํ•˜๋Š”์ง€ ํ™•์‹คํ•˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค.

์ƒˆ ๊ตฌ์„ฑ์ด .pacnew ๋˜์—ˆ์œผ๋ฏ€๋กœ ์ƒˆ ๋ณ€๊ฒฝ ์‚ฌํ•ญ์„ ์ด์ „ ๊ตฌ์„ฑ์œผ๋กœ ๋ณ‘ํ•ฉํ–ˆ์Šต๋‹ˆ๋‹ค. ์ด๊ฒƒ์€ ๋‚ด ํ˜„์žฌ ์„ค์ •ํ•˜๊ณ  ์ด ๋„์›€์ด ๊ฒฝ์šฐ, ์˜ˆ์ „ ์„ค์ •์ž…๋‹ˆ๋‹ค.

systemctl status systemd-swap.service ๋Š” ์˜ค๋ฅ˜๋ฅผ ํ‘œ์‹œํ•˜์ง€ ์•Š์œผ๋ฉฐ ์„œ๋น„์Šค๊ฐ€ ํ™œ์„ฑ ์ƒํƒœ์ž…๋‹ˆ๋‹ค.

โ— systemd-swap.service - Manage swap spaces on zram, files and partitions.
     Loaded: loaded (/usr/lib/systemd/system/systemd-swap.service; enabled; vendor preset: disabled)
     Active: active (exited) since Mon 2020-06-08 15:06:05 CEST; 49min ago
    Process: 502 ExecStart=/usr/bin/systemd-swap start (code=exited, status=0/SUCCESS)
   Main PID: 502 (code=exited, status=0/SUCCESS)
        CPU: 290ms

Jun 08 15:06:05 noname systemd[1]: Started Manage swap spaces on zram, files and partitions..
Jun 08 15:06:05 noname systemd-swap[502]: INFO: Load: /etc/systemd/swap.conf
Jun 08 15:06:05 noname systemd-swap[502]: INFO: Zswap: backup current configuration: start
Jun 08 15:06:05 noname systemd-swap[502]: INFO: Zswap: backup current configuration: complete
Jun 08 15:06:05 noname systemd-swap[502]: INFO: Zswap: set new parameters: start
Jun 08 15:06:05 noname systemd-swap[502]: INFO: Zswap: Enable: 1, Comp: zstd,  Max pool %: 25, Zpool: z3fold
Jun 08 15:06:05 noname systemd-swap[502]: INFO: Zswap: set new parameters: complete
Jun 08 15:06:06 noname systemd-swap[502]: INFO: swapD: pickup devices from systemd-gpt-auto-generator
Jun 08 15:06:06 noname systemd-swap[502]: INFO: swapD: searching swap devices

free -h ๋Š” 0B ์Šค์™‘์„ ํ‘œ์‹œํ•˜๊ณ  swapon --show ๋Š” ์•„๋ฌด ๊ฒƒ๋„ ํ‘œ์‹œํ•˜์ง€ ์•Š์Šต๋‹ˆ๋‹ค.

              total        used        free      shared  buff/cache   available
Mem:          7.6Gi       1.8Gi       4.4Gi       269Mi       1.5Gi       5.3Gi
Swap:            0B          0B          0B

์‚ฌ์‹ค systemd-swap์€ ์ฒ˜์Œ ์‚ฌ์šฉํ•  ๋•Œ ์ž‘๋™ํ–ˆ์œผ๋ฉฐ ์ง€๊ธˆ์€ ํ•œ๋™์•ˆ ์‚ฌ์šฉํ–ˆ์Šต๋‹ˆ๋‹ค. ์ด ์—…๋ฐ์ดํŠธ ํ›„์—์•ผ ์—ฌ์ „ํžˆ ์ž‘๋™ํ•˜๋Š”์ง€ ํ™•์ธํ•˜๊ณ  ์‹ถ์—ˆ๊ณ  ์ž‘๋™ํ•˜๋Š”์ง€ ํ™•์‹ ํ•  ์ˆ˜ ์—†์Šต๋‹ˆ๋‹ค.

๊ฐ€์žฅ ์œ ์šฉํ•œ ๋Œ“๊ธ€

https://access.redhat.com/solutions/103833 TL;DR์„ ์ฝ๋Š” ๊ฒƒ์ด ์ข‹์Šต๋‹ˆ๋‹ค. ๊ธฐ๋ณธ ์„ค์ •(vm.swappiness=60 ๋“ฑ)์„ ์‹คํ–‰ํ•˜๋Š” ๊ฒฝ์šฐ ์˜๋„ํ•œ ๋Œ€๋กœ ์ž‘๋™ํ•ฉ๋‹ˆ๋‹ค.

๋ชจ๋“  6 ๋Œ“๊ธ€

์˜ˆ (์•„๋งˆ๋„) ์ž‘๋™ํ•ฉ๋‹ˆ๋‹ค!
4.1์˜ ์ƒˆ๋กœ์šด ๊ธฐ๋Šฅ์€ ์—ฌ์œ  ๋žจ(์บ์‹œ ๋˜๋Š” ์‚ฌ์šฉ ๋˜๋Š” ๊ธฐํƒ€)์˜ ์–‘์ด ์ ์€ ๊ฒฝ์šฐ์—๋งŒ ์Šค์™‘ ํŒŒ์ผ์ด ํ• ๋‹น๋œ๋‹ค๋Š” ๊ฒƒ์ž…๋‹ˆ๋‹ค. #105์—์„œ ๋” ๋งŽ์€ ๊ฒƒ์„ ์ฝ์„ ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค(๊ทธ ์ดํ›„์— ์ฝ”๋“œ๊ฐ€ ์—…๋ฐ์ดํŠธ๋˜์—ˆ์ง€๋งŒ).

์„œ๋น„์Šค ์‹œ์ž‘ ํ›„ ์‚ฌ์šฉ์ž์—๊ฒŒ swapFC๊ฐ€ ์‹ค์ œ๋กœ ๋ฉ”๋ชจ๋ฆฌ ์ƒํƒœ๋ฅผ ์ ๊ทน์ ์œผ๋กœ ๋ชจ๋‹ˆํ„ฐ๋งํ•˜๊ณ  ์žˆ์Œ์„ ์•Œ๋ฆฌ๋Š” ์งง์€ ๋กœ๊ทธ ๋ฉ”์‹œ์ง€๊ฐ€ ๊ถŒ์žฅ๋  ์ˆ˜ ์žˆ์Šต๋‹ˆ๊นŒ?

@Jarel1337 ๊ต‰์žฅํ•ฉ๋‹ˆ๋‹ค. ๋„ˆ๋ฌด ๋นจ๋ฆฌ ์‘๋‹ตํ•˜๊ณ  ์•Œ๋ ค์ฃผ์…”์„œ ๊ฐ์‚ฌํ•ฉ๋‹ˆ๋‹ค. ์ข‹์€ ์†Œ๋ฆฌ! :์›ƒ๋‹ค:

@Jarel1337 ์‹ค์ œ๋กœ, ๋‚˜๋Š” ๋‹น์‹ ์ด ๋งํฌ ํ•œ PR์„ ์ฝ๊ณ  ์งˆ๋ฌธ์ด ์žˆ์Šต๋‹ˆ๋‹ค. RAM์ด ๋‚ฎ์„ ๋•Œ ์Šค์™‘ ํŒŒ์ผ์ด _only_ ์ƒ์„ฑ๋˜๋ฉด ์‹œ์Šคํ…œ์ด ๋‹ค๋ฅธ ๋ฐฉ์‹์œผ๋กœ ์Šค์™‘์˜ ์ด์ ์„ ์–ป์ง€ ๋ชปํ•ฉ๋‹ˆ๊นŒ?

๋‚ด๊ฐ€ ์•„๋Š” ํ•œ ์Šค์™‘์€ "์ถ”๊ฐ€ RAM"์œผ๋กœ๋งŒ ์‚ฌ์šฉ๋˜๋Š” ๊ฒƒ์ด ์•„๋‹™๋‹ˆ๋‹ค. https://chrisdown.name/2018/01/02/in-defence-of-swap.html

https://access.redhat.com/solutions/103833 TL;DR์„ ์ฝ๋Š” ๊ฒƒ์ด ์ข‹์Šต๋‹ˆ๋‹ค. ๊ธฐ๋ณธ ์„ค์ •(vm.swappiness=60 ๋“ฑ)์„ ์‹คํ–‰ํ•˜๋Š” ๊ฒฝ์šฐ ์˜๋„ํ•œ ๋Œ€๋กœ ์ž‘๋™ํ•ฉ๋‹ˆ๋‹ค.

๋˜ํ•œ ์ด๋ฅผ ์œ„ํ•ด systemd-swap์—์„œ ์ง์ ‘ ๊ด€๋ฆฌํ•˜์ง€ ์•Š๋Š” ์ •์  ์Šค์™‘ ํŒŒ์ผ์ด๋‚˜ ํŒŒํ‹ฐ์…˜์„ ์ถ”๊ฐ€ํ•  ์ˆ˜ ์žˆ์Šต๋‹ˆ๋‹ค.

์ด ํŽ˜์ด์ง€๊ฐ€ ๋„์›€์ด ๋˜์—ˆ๋‚˜์š”?
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