NVMe disk shows 80% io utilization, partitions show 0% io utilizationLow level disk i/o on linuxUnderstanding...
Why did Missandei say this?
Why is there a cap on 401k contributions?
My Sixteen Friendly Students
Crime rates in a post-scarcity economy
How do I minimise waste on a flight?
Gift for mentor after his thesis defense?
What are my options legally if NYC company is not paying salary?
99 coins into the sacks
Why is it wrong to *implement* myself a known, published, widely believed to be secure crypto algorithm?
When I add a cylinder, it doesn't even show up on my screen at all
Are wands in any sort of book going to be too much like Harry Potter?
Are there vaccine ingredients which may not be disclosed ("hidden", "trade secret", or similar)?
Why doesn't Dany protect her dragons better?
Would the rotation of the starfield from a ring station be too disorienting?
Sed operations are not working or might i am doing it wrong?
Can a character shove an enemy who is already prone?
Names of the Six Tastes
Sprout Reports plugin - How to output a Matrix field into a row
The unknown and unexplained in science fiction
When was it publicly revealed that a KH-11 spy satellite took pictures of the first Shuttle flight?
Is there an idiom that means "revealing a secret unintentionally"?
How is it believable that Euron could so easily pull off this ambush?
Why are thrust reversers not used down to taxi speeds?
Can the president of the United States be guilty of insider trading?
NVMe disk shows 80% io utilization, partitions show 0% io utilization
Low level disk i/o on linuxUnderstanding iostat with Linux software RAIDCurrent disk loadNVMe PCIe disk power cyclingMonitor temperature/IO of NVMe driveiostat disk utilization is full when there is no IO happeningFDISK doesn't show any partitions for a disk, trying to resize an LVM disk, running CentOSDisk io stat “averaged” over a period of timeGet Disk Stats based on different parametersIO wait time is higher than disk utilization. Isn't this impossible?
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ margin-bottom:0;
}
I have a CentOS 7 server (kernel 3.10.0-957.12.1.el7.x86_64) with 2 NVMe disks with the following setup:
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme0n1 259:0 0 477G 0 disk
├─nvme0n1p1 259:2 0 511M 0 part /boot/efi
├─nvme0n1p2 259:4 0 19.5G 0 part
│ └─md2 9:2 0 19.5G 0 raid1 /
├─nvme0n1p3 259:7 0 511M 0 part [SWAP]
└─nvme0n1p4 259:9 0 456.4G 0 part
└─data-data 253:0 0 912.8G 0 lvm /data
nvme1n1 259:1 0 477G 0 disk
├─nvme1n1p1 259:3 0 511M 0 part
├─nvme1n1p2 259:5 0 19.5G 0 part
│ └─md2 9:2 0 19.5G 0 raid1 /
├─nvme1n1p3 259:6 0 511M 0 part [SWAP]
└─nvme1n1p4 259:8 0 456.4G 0 part
└─data-data 253:0 0 912.8G 0 lvm /data
Our monitoring and iostat continually shows nvme0n1 and nvme1n1 with 80%+ io utilization while the individual partitions have 0% io utilization and are fully available (250k iops, 1GB read/write per sec).
avg-cpu: %user %nice %system %iowait %steal %idle
7.14 0.00 3.51 0.00 0.00 89.36
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
nvme1n1 0.00 0.00 0.00 50.50 0.00 222.00 8.79 0.73 0.02 0.00 0.02 14.48 73.10
nvme1n1p1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme1n1p2 0.00 0.00 0.00 49.50 0.00 218.00 8.81 0.00 0.02 0.00 0.02 0.01 0.05
nvme1n1p3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme1n1p4 0.00 0.00 0.00 1.00 0.00 4.00 8.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme0n1 0.00 0.00 0.00 49.50 0.00 218.00 8.81 0.73 0.02 0.00 0.02 14.77 73.10
nvme0n1p1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme0n1p2 0.00 0.00 0.00 49.50 0.00 218.00 8.81 0.00 0.02 0.00 0.02 0.01 0.05
nvme0n1p3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme0n1p4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
md2 0.00 0.00 0.00 48.50 0.00 214.00 8.82 0.00 0.00 0.00 0.00 0.00 0.00
dm-0 0.00 0.00 0.00 1.00 0.00 4.00 8.00 0.00 0.00 0.00 0.00 0.00 0.00
Any ideas what can be the root cause for such behavior?
All seems to be working fine except for monitoring triggering high io alerts.
lvm performance io ssd iostat
asked 3 hours ago
michal kralikmichal kralik
1284
add a comment |
I have a CentOS 7 server (kernel 3.10.0-957.12.1.el7.x86_64) with 2 NVMe disks with the following setup:
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme0n1 259:0 0 477G 0 disk
├─nvme0n1p1 259:2 0 511M 0 part /boot/efi
├─nvme0n1p2 259:4 0 19.5G 0 part
│ └─md2 9:2 0 19.5G 0 raid1 /
├─nvme0n1p3 259:7 0 511M 0 part [SWAP]
└─nvme0n1p4 259:9 0 456.4G 0 part
└─data-data 253:0 0 912.8G 0 lvm /data
nvme1n1 259:1 0 477G 0 disk
├─nvme1n1p1 259:3 0 511M 0 part
├─nvme1n1p2 259:5 0 19.5G 0 part
│ └─md2 9:2 0 19.5G 0 raid1 /
├─nvme1n1p3 259:6 0 511M 0 part [SWAP]
└─nvme1n1p4 259:8 0 456.4G 0 part
└─data-data 253:0 0 912.8G 0 lvm /data
Our monitoring and iostat continually shows nvme0n1 and nvme1n1 with 80%+ io utilization while the individual partitions have 0% io utilization and are fully available (250k iops, 1GB read/write per sec).
avg-cpu: %user %nice %system %iowait %steal %idle
7.14 0.00 3.51 0.00 0.00 89.36
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
nvme1n1 0.00 0.00 0.00 50.50 0.00 222.00 8.79 0.73 0.02 0.00 0.02 14.48 73.10
nvme1n1p1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme1n1p2 0.00 0.00 0.00 49.50 0.00 218.00 8.81 0.00 0.02 0.00 0.02 0.01 0.05
nvme1n1p3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme1n1p4 0.00 0.00 0.00 1.00 0.00 4.00 8.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme0n1 0.00 0.00 0.00 49.50 0.00 218.00 8.81 0.73 0.02 0.00 0.02 14.77 73.10
nvme0n1p1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme0n1p2 0.00 0.00 0.00 49.50 0.00 218.00 8.81 0.00 0.02 0.00 0.02 0.01 0.05
nvme0n1p3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme0n1p4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
md2 0.00 0.00 0.00 48.50 0.00 214.00 8.82 0.00 0.00 0.00 0.00 0.00 0.00
dm-0 0.00 0.00 0.00 1.00 0.00 4.00 8.00 0.00 0.00 0.00 0.00 0.00 0.00
Any ideas what can be the root cause for such behavior?
All seems to be working fine except for monitoring triggering high io alerts.
lvm performance io ssd iostat
asked 3 hours ago
michal kralikmichal kralik
1284
add a comment |
I have a CentOS 7 server (kernel 3.10.0-957.12.1.el7.x86_64) with 2 NVMe disks with the following setup:
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme0n1 259:0 0 477G 0 disk
├─nvme0n1p1 259:2 0 511M 0 part /boot/efi
├─nvme0n1p2 259:4 0 19.5G 0 part
│ └─md2 9:2 0 19.5G 0 raid1 /
├─nvme0n1p3 259:7 0 511M 0 part [SWAP]
└─nvme0n1p4 259:9 0 456.4G 0 part
└─data-data 253:0 0 912.8G 0 lvm /data
nvme1n1 259:1 0 477G 0 disk
├─nvme1n1p1 259:3 0 511M 0 part
├─nvme1n1p2 259:5 0 19.5G 0 part
│ └─md2 9:2 0 19.5G 0 raid1 /
├─nvme1n1p3 259:6 0 511M 0 part [SWAP]
└─nvme1n1p4 259:8 0 456.4G 0 part
└─data-data 253:0 0 912.8G 0 lvm /data
Our monitoring and iostat continually shows nvme0n1 and nvme1n1 with 80%+ io utilization while the individual partitions have 0% io utilization and are fully available (250k iops, 1GB read/write per sec).
avg-cpu: %user %nice %system %iowait %steal %idle
7.14 0.00 3.51 0.00 0.00 89.36
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
nvme1n1 0.00 0.00 0.00 50.50 0.00 222.00 8.79 0.73 0.02 0.00 0.02 14.48 73.10
nvme1n1p1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme1n1p2 0.00 0.00 0.00 49.50 0.00 218.00 8.81 0.00 0.02 0.00 0.02 0.01 0.05
nvme1n1p3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme1n1p4 0.00 0.00 0.00 1.00 0.00 4.00 8.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme0n1 0.00 0.00 0.00 49.50 0.00 218.00 8.81 0.73 0.02 0.00 0.02 14.77 73.10
nvme0n1p1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme0n1p2 0.00 0.00 0.00 49.50 0.00 218.00 8.81 0.00 0.02 0.00 0.02 0.01 0.05
nvme0n1p3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme0n1p4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
md2 0.00 0.00 0.00 48.50 0.00 214.00 8.82 0.00 0.00 0.00 0.00 0.00 0.00
dm-0 0.00 0.00 0.00 1.00 0.00 4.00 8.00 0.00 0.00 0.00 0.00 0.00 0.00
Any ideas what can be the root cause for such behavior?
All seems to be working fine except for monitoring triggering high io alerts.
lvm performance io ssd iostat
asked 3 hours ago
michal kralikmichal kralik
1284
I have a CentOS 7 server (kernel 3.10.0-957.12.1.el7.x86_64) with 2 NVMe disks with the following setup:
# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
nvme0n1 259:0 0 477G 0 disk
├─nvme0n1p1 259:2 0 511M 0 part /boot/efi
├─nvme0n1p2 259:4 0 19.5G 0 part
│ └─md2 9:2 0 19.5G 0 raid1 /
├─nvme0n1p3 259:7 0 511M 0 part [SWAP]
└─nvme0n1p4 259:9 0 456.4G 0 part
└─data-data 253:0 0 912.8G 0 lvm /data
nvme1n1 259:1 0 477G 0 disk
├─nvme1n1p1 259:3 0 511M 0 part
├─nvme1n1p2 259:5 0 19.5G 0 part
│ └─md2 9:2 0 19.5G 0 raid1 /
├─nvme1n1p3 259:6 0 511M 0 part [SWAP]
└─nvme1n1p4 259:8 0 456.4G 0 part
└─data-data 253:0 0 912.8G 0 lvm /data
Our monitoring and iostat continually shows nvme0n1 and nvme1n1 with 80%+ io utilization while the individual partitions have 0% io utilization and are fully available (250k iops, 1GB read/write per sec).
avg-cpu: %user %nice %system %iowait %steal %idle
7.14 0.00 3.51 0.00 0.00 89.36
Device: rrqm/s wrqm/s r/s w/s rkB/s wkB/s avgrq-sz avgqu-sz await r_await w_await svctm %util
nvme1n1 0.00 0.00 0.00 50.50 0.00 222.00 8.79 0.73 0.02 0.00 0.02 14.48 73.10
nvme1n1p1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme1n1p2 0.00 0.00 0.00 49.50 0.00 218.00 8.81 0.00 0.02 0.00 0.02 0.01 0.05
nvme1n1p3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme1n1p4 0.00 0.00 0.00 1.00 0.00 4.00 8.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme0n1 0.00 0.00 0.00 49.50 0.00 218.00 8.81 0.73 0.02 0.00 0.02 14.77 73.10
nvme0n1p1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme0n1p2 0.00 0.00 0.00 49.50 0.00 218.00 8.81 0.00 0.02 0.00 0.02 0.01 0.05
nvme0n1p3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
nvme0n1p4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
md2 0.00 0.00 0.00 48.50 0.00 214.00 8.82 0.00 0.00 0.00 0.00 0.00 0.00
dm-0 0.00 0.00 0.00 1.00 0.00 4.00 8.00 0.00 0.00 0.00 0.00 0.00 0.00
Any ideas what can be the root cause for such behavior?
All seems to be working fine except for monitoring triggering high io alerts.
lvm performance io ssd iostat
lvm performance io ssd iostat
asked 3 hours ago
michal kralikmichal kralik
1284
asked 3 hours ago
michal kralikmichal kralik
1284
asked 3 hours ago
michal kralikmichal kralik
1284
asked 3 hours ago
michal kralikmichal kralik
1284
asked 3 hours ago
michal kralikmichal kralik
1284
1284
add a comment |
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "106"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f517667%2fnvme-disk-shows-80-io-utilization-partitions-show-0-io-utilization%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Unix & Linux Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2funix.stackexchange.com%2fquestions%2f517667%2fnvme-disk-shows-80-io-utilization-partitions-show-0-io-utilization%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
