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Extreme load which is caused by sabnzbd and jurnalyng jbd2/md2-8
Posted: May 7th, 2019, 10:41 am
by loopdemack
Extreme load which is caused by sabnzbd and jurnaling jbd2/md2-8 on Debian 8.11 (jessie).
The machine isSoft Raid5 with 4x6tb hitachi 7200 with 32gb of ram with i7-3770 CPU @ 3.40GHz.
What could I edit in source of sabnzbd to make it easier on trashing the journaling and jbd2. Also I'm seeing that instead of unpacking with unrar I see that sabnzbd is unpacking with rar ?
Downloading speed is very moderate 910Mbit/s its not something that could be so hard for this machine, and I got extreme load and very sluggish machine when sab is downloading.
Machine with much lower specs on Windows 10 is like Formula 1 comparing this beast with this Debian.
Re: Extreme load which is caused by sabnzbd and jurnalyng jbd2/md2-8
Posted: May 7th, 2019, 12:04 pm
by sander
loopdemack wrote: ↑May 7th, 2019, 10:41 am
Extreme load which is caused by sabnzbd and jurnaling jbd2/md2-8 on Debian 8.11 (jessie).
What is the extreme load?
TIL: jdb2 is ("jbd2 is a kernel thread that updates the filesystem journal."), and "md2-8" is the name of linux software RAID "md (multiple device) " and originally "Mirror Disk".
loopdemack wrote: ↑May 7th, 2019, 10:41 am
The machine isSoft Raid5 with 4x6tb hitachi 7200 with 32gb of ram with i7-3770 CPU @ 3.40GHz.
What if you let SAB write to a plain partition (thus not softraid5)
loopdemack wrote: ↑May 7th, 2019, 10:41 am
What could I edit in source of sabnzbd to make it easier on trashing the journaling and jbd2.
SABnzbd does not know about trashing / journaling / jbd2, so how could sabnzbd make that easier?
FWIW: on my Ubuntu 19.04, with ext4
SAB not downloading:
Code: Select all
$ top -bn1 | grep -e USER -e jbd2 ; sudo iotop -bn1 | grep -e USER -e jbd2
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
268 root 20 0 0 0 0 S 0,0 0,0 0:03.52 jbd2/sda1-8
630 root 20 0 0 0 0 S 0,0 0,0 0:28.11 jbd2/sda2-8
TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
268 be/3 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [jbd2/sda1-8]
630 be/3 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [jbd2/sda2-8]
16325 be/4 sander 0.00 B/s 0.00 B/s 0.00 % 0.00 % grep --color=auto -e USER -e jbd2
SAB download at 80 Mbps
Code: Select all
$ top -bn1 | grep -e USER -e jbd2 ; sudo iotop -bn1 | grep -e USER -e jbd2
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
268 root 20 0 0 0 0 S 0,0 0,0 0:03.52 jbd2/sda1-8
630 root 20 0 0 0 0 S 0,0 0,0 0:28.12 jbd2/sda2-8
TID PRIO USER DISK READ DISK WRITE SWAPIN IO COMMAND
268 be/3 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [jbd2/sda1-8]
630 be/3 root 0.00 B/s 0.00 B/s 0.00 % 0.00 % [jbd2/sda2-8]
16507 be/4 sander 0.00 B/s 0.00 B/s 0.00 % 0.00 % grep --color=auto -e USER -e jbd2