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Date: Fri, 12 Jul 2024 04:27:54 -0700
From: Ammar Rafli <support@biznetgio.com>
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To: "Ammar Faizi" <ammarfaizi2@gnuweeb.org>
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Subject: Re:[## 385523 ##] Disk I/O di Neo Lite kembali bermasalah
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------=_Part_1148863_585998384.1720783674085
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Hi Bapak Ammar
 
 Selamat Malam
 
 Menanggapi email yang disampaikan, Saat Bapak melakukan pengetesan FIO secara konstan selama beberapa hari, apakah Bapak dapat men-capture load average server secara berkala Pak? dan apakah Bapak mempunyai capture load average server sebelum kendala terjadi?
 
 Mohon informasinya pada ticket ini agar dapat kami koordinasikan dahulu.

Terima kasih atas perhatian dan kerjasamanya.

Penilaian Anda sangat membantu perbaikan dan evaluasi pelayanan kami. Ketika tiket pengaduan Anda kami tutup akan ada otomatis link survei kepuasan pelanggan di mailbox Anda. Mohon untuk memberikan penilaian Anda.

Regards
 
 Ammar Rafli Arkan
Product Operation Support
-----------------------------------------------------------
PT. Biznet Gio Nusantara
MidPlaza 1, 7th Floor. Jl. Jend. Sudirman Kav 10 - 11. Jakarta 10220 - Indonesia. 
-----------------------------------------------------------
Click here to submit your feature request.

The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. 
 
 
---- on Fri, 12 Jul 2024 18:12:17 +0700 "Ammar Faizi"<ammarfaizi2@gnuweeb.org> wrote ---- 
 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 
 
 

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Content-Transfer-Encoding: quoted-printable

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head>
<meta http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dutf-8"></=
head><body><div style=3D"font-size: 13px; font-family: Arial, Helvetica, sa=
ns-serif"><div><div style=3D"font-size: 13px; font-family: Arial, Helvetica=
, Verdana, sans-serif"><div style=3D"font-size: 13px; font-family: Arial, H=
elvetica, Verdana, sans-serif"><div style=3D"font-size: 13px; font-family: =
Arial, Helvetica, Verdana, sans-serif"><div>Hi Bapak Ammar<br></div><div><b=
r></div><div>Selamat Malam<br></div><div><br></div><div>Menanggapi email ya=
ng disampaikan, Saat Bapak melakukan pengetesan FIO secara konstan selama b=
eberapa hari, apakah Bapak dapat men-capture load average server secara ber=
kala Pak? dan apakah Bapak mempunyai capture load average server sebelum ke=
ndala terjadi?<br></div><div><br></div><div>Mohon informasinya pada ticket =
ini agar dapat kami koordinasikan dahulu.<br><br>Terima kasih atas perhatia=
n dan kerjasamanya.<br><br><b><i>Penilaian Anda sangat membantu perbaikan d=
an evaluasi pelayanan kami. Ketika tiket pengaduan Anda kami tutup akan ada=
 otomatis link survei kepuasan pelanggan di mailbox Anda. Mohon untuk membe=
rikan penilaian Anda.<br></i></b><br>Regards<br></div><div style=3D"font-si=
ze: 13px; font-family: Arial, Helvetica, Verdana, sans-serif"><div style=3D=
"font-size: 13px; font-family: Arial, Helvetica, Verdana, sans-serif"><div =
style=3D"font-size: 13px; font-family: Arial, Helvetica, Verdana, sans-seri=
f"><div style=3D"font-size: 13px; font-family: Arial, Helvetica, Verdana, s=
ans-serif"><div style=3D"font-size: 13px; font-family: Arial, Helvetica, Ve=
rdana, sans-serif"><div style=3D"font-size: 13px; font-family: Arial, Helve=
tica, Verdana, sans-serif"><br></div><div style=3D"font-size: 13px; font-fa=
mily: Arial, Helvetica, Verdana, sans-serif">Ammar Rafli Arkan<br>Product O=
peration Support<br>-------------------------------------------------------=
----<br>PT. Biznet Gio Nusantara<br>MidPlaza 1, 7th Floor. Jl. Jend. Sudirm=
an Kav 10 - 11. Jakarta 10220 - Indonesia. <br>----------------------------=
-------------------------------<br><b>Click </b><a target=3D"_blank" rel=3D=
"noreferrer" href=3D"https://forms.office.com/r/4ng3dpwnBM"><b>here</b></a>=
<b> to submit your feature request.</b><br><br>The information contained in=
 this electronic message and any attachments to this message are intended f=
or the exclusive use of the addressee(s) and may contain proprietary, confi=
dential or privileged information. If you are not the intended recipient, y=
ou should not disseminate, distribute or copy this e-mail. Please notify th=
e sender immediately and destroy all copies of this message and any attachm=
ents.</div></div><div><br></div></div></div></div><div><br></div></div></di=
v></div></div></div><div title=3D"sign_holder::end"></div><div><br>---- on =
Fri, 12 Jul 2024 18:12:17 +0700 <b> &quot;Ammar Faizi&quot;&lt;ammarfaizi2@=
gnuweeb.org&gt; </b> wrote ---- <br></div><div title=3D"beforequote:::"></d=
iv><div><blockquote style=3D"border-left: 1px dotted rgb(229, 229, 229); ma=
rgin-left: 5px; padding-left: 5px" spellcheck=3D"false"><div><div>Melanjutk=
an masalah IOPS di Neo Lite.
<br>
<br>IOPS di Neo Lite kembali bermasalah. Sudah sejak bulan Juni kemarin
<br>saya mengalami masalah disk I/O di Neo Lite.
<br>
<br>Gejala: process stuck di &quot;D&quot; state cukup lama ketika melakuka=
n disk
<br>operation.
<br>
<br>Masalah ini kadang muncul, kadang hilang. Dengan kata lain, disk I/O
<br>yang stuck ini *tidak selalu* terjadi, tapi ketika terjadi dampaknya
<br>bisa membuat VM menjadi freeze seperti yang dikeluhkan beberapa user
<br>Biznet Gio lain juga (di Facebook).
<br>
<br>Kemudian sejak tanggal 8 Juli, saya melakukan stress test menggunakan
<br>fio 24 jam non stop untuk pembuktian masalah ini. Command yang saya
<br>jalankan:
<br>
<br>  while true; do
<br>     fio --name=3Dio_uring --ioengine=3Dio_uring --iodepth=3D1024 --fil=
ename=3D./test --rw=3Drw --bs=3D16K --numjobs=3D2 --size=3D10G --direct=3D1=
;
<br>  done;
<br>
<br>IP VPS yang digunakan untuk testing: 103.175.218.159
<br>
<br>Selama 4 hari berjalan normal, namun hari ini sekitar jam 17:26
<br>terkendala process stuck di &quot;D&quot; state lebih dari 30 detik.
<br>
<br>  [Jul12 17:26] INFO: task jbd2/sda1-8:377 blocked for more than 30 sec=
onds.
<br>  [  +0.001509]       Not tainted 6.8.1-af-server-2024-03-19-g760d1c206=
de8 #8
<br>  [  +0.001374] &quot;echo 0 &gt; /proc/sys/kernel/hung_task_timeout_se=
cs&quot; disables this message.
<br>  [  +0.001361] task:jbd2/sda1-8     state:D stack:0     pid:377   tgid=
:377   ppid:2      flags:0x00004000
<br>  [  +0.000021] Call Trace:
<br>  [  +0.000021]  &lt;TASK&gt;
<br>  [  +0.000028]  __schedule+0x5e7/0x14a0
<br>  [  +0.000083]  ? submit_bio_noacct_nocheck+0x2cc/0x360
<br>  [  +0.000022]  schedule+0x8e/0x160
<br>  [  +0.000004]  bit_wait_io+0x45/0xa0
<br>  [  +0.000006]  __wait_on_bit+0xe1/0x170
<br>  [  +0.000003]  ? bit_wait_io_timeout+0xc0/0xc0
<br>  [  +0.000004]  jbd2_journal_commit_transaction+0x191b/0x2320
<br>  [  +0.000021]  ? wake_up_bit+0xd0/0xd0
<br>  [  +0.000018]  kjournald2+0x120/0x460
<br>  [  +0.000013]  ? init_wait_entry+0x30/0x30
<br>  [  +0.000004]  kthread+0x1f9/0x230
<br>  [  +0.000014]  ? jbd2_journal_update_sb_log_tail+0x180/0x180
<br>  [  +0.000005]  ? kthreadd+0x380/0x380
<br>  [  +0.000002]  ret_from_fork+0x30/0x40
<br>  [  +0.000031]  ? kthreadd+0x380/0x380
<br>  [  +0.000002]  ret_from_fork_asm+0x11/0x20
<br>  [  +0.000015]  &lt;/TASK&gt;
<br>
<br>jbd2/sda1 sendiri adalah sebuah kernel thread dari module ext4.
<br>
<br>Mohon solusi dari pihak Biznet Gio terkait masalah ini. Masalah ini
<br>kadang muncul, kadang hilang.
<br>
<br>Terima kasih.
<br>
<br>--=20
<br>Ammar Faizi
<br>
<br></div></div></blockquote></div><div><br></div></div><div id=3D"ZDeskInt=
eg"><meta itemprop=3D"zdeskTicket" content=3D"641566669::127631000189285462=
::127631000189290173"></div><br></body></html>=

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