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* Disk I/O di Neo Lite kembali bermasalah
@ 2024-07-12 11:12 Ammar Faizi
  2024-07-12 11:27 ` Re:[## 385523 ##] " Ammar Rafli
  0 siblings, 1 reply; 22+ messages in thread
From: Ammar Faizi @ 2024-07-12 11:12 UTC (permalink / raw)
  To: Biznet Gio Support
  Cc: Yusuf Hadiwinata, GNU/Weeb Mailing List, Alviro Iskandar Setiawan,
	Paber Panjaitan

Melanjutkan masalah IOPS di Neo Lite.

IOPS di Neo Lite kembali bermasalah. Sudah sejak bulan Juni kemarin
saya mengalami masalah disk I/O di Neo Lite.

Gejala: process stuck di "D" state cukup lama ketika melakukan disk
operation.

Masalah ini kadang muncul, kadang hilang. Dengan kata lain, disk I/O
yang stuck ini *tidak selalu* terjadi, tapi ketika terjadi dampaknya
bisa membuat VM menjadi freeze seperti yang dikeluhkan beberapa user
Biznet Gio lain juga (di Facebook).

Kemudian sejak tanggal 8 Juli, saya melakukan stress test menggunakan
fio 24 jam non stop untuk pembuktian masalah ini. Command yang saya
jalankan:

  while true; do
     fio --name=io_uring --ioengine=io_uring --iodepth=1024 --filename=./test --rw=rw --bs=16K --numjobs=2 --size=10G --direct=1;
  done;

IP VPS yang digunakan untuk testing: 103.175.218.159

Selama 4 hari berjalan normal, namun hari ini sekitar jam 17:26
terkendala process stuck di "D" state lebih dari 30 detik.

  [Jul12 17:26] INFO: task jbd2/sda1-8:377 blocked for more than 30 seconds.
  [  +0.001509]       Not tainted 6.8.1-af-server-2024-03-19-g760d1c206de8 #8
  [  +0.001374] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
  [  +0.001361] task:jbd2/sda1-8     state:D stack:0     pid:377   tgid:377   ppid:2      flags:0x00004000
  [  +0.000021] Call Trace:
  [  +0.000021]  <TASK>
  [  +0.000028]  __schedule+0x5e7/0x14a0
  [  +0.000083]  ? submit_bio_noacct_nocheck+0x2cc/0x360
  [  +0.000022]  schedule+0x8e/0x160
  [  +0.000004]  bit_wait_io+0x45/0xa0
  [  +0.000006]  __wait_on_bit+0xe1/0x170
  [  +0.000003]  ? bit_wait_io_timeout+0xc0/0xc0
  [  +0.000004]  jbd2_journal_commit_transaction+0x191b/0x2320
  [  +0.000021]  ? wake_up_bit+0xd0/0xd0
  [  +0.000018]  kjournald2+0x120/0x460
  [  +0.000013]  ? init_wait_entry+0x30/0x30
  [  +0.000004]  kthread+0x1f9/0x230
  [  +0.000014]  ? jbd2_journal_update_sb_log_tail+0x180/0x180
  [  +0.000005]  ? kthreadd+0x380/0x380
  [  +0.000002]  ret_from_fork+0x30/0x40
  [  +0.000031]  ? kthreadd+0x380/0x380
  [  +0.000002]  ret_from_fork_asm+0x11/0x20
  [  +0.000015]  </TASK>

jbd2/sda1 sendiri adalah sebuah kernel thread dari module ext4.

Mohon solusi dari pihak Biznet Gio terkait masalah ini. Masalah ini
kadang muncul, kadang hilang.

Terima kasih.

-- 
Ammar Faizi


^ permalink raw reply	[flat|nested] 22+ messages in thread

end of thread, other threads:[~2024-07-12 14:45 UTC | newest]

Thread overview: 22+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2024-07-12 11:12 Disk I/O di Neo Lite kembali bermasalah Ammar Faizi
2024-07-12 11:27 ` Re:[## 385523 ##] " Ammar Rafli
2024-07-12 11:34   ` [## " Ammar Faizi
2024-07-12 11:40     ` Ammar Rafli
2024-07-12 11:47       ` [## " Ammar Faizi
2024-07-12 11:57         ` Ammar Rafli
2024-07-12 12:09           ` [## " Ammar Faizi
2024-07-12 12:20             ` Ammar Rafli
2024-07-12 12:23               ` Ammar Rafli
2024-07-12 12:42                 ` [## " Ammar Faizi
2024-07-12 13:00                   ` Ammar Rafli
2024-07-12 13:19                     ` [## " Ammar Faizi
2024-07-12 13:06                   ` Yusuf Hadiwinata
2024-07-12 13:12                     ` Yusuf Hadiwinata
2024-07-12 13:13                       ` Ammar Faizi
2024-07-12 13:20                         ` Yusuf Hadiwinata
2024-07-12 13:21                           ` Ammar Faizi
2024-07-12 13:31                             ` Yusuf Hadiwinata
2024-07-12 13:40                               ` Ammar Faizi
2024-07-12 14:12                                 ` Ammar Rafli
2024-07-12 14:45                               ` [## " Yusuf Hadiwinata
2024-07-12 13:12                     ` Ammar Faizi

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