# Error netdata.dbengine\_long\_term\_page\_stats streaming / dbengine storage tiers
**URL:** https://community.netdata.cloud/t/error-netdata-dbengine-long-term-page-stats-streaming-dbengine-storage-tiers/4392
**Category:** Help
**Tags:** agent, alerts
**Created:** [July 13, 2023, 2:18pm UTC](https://community.netdata.cloud/t/error-netdata-dbengine-long-term-page-stats-streaming-dbengine-storage-tiers/4392 "2023-07-13T14:18:29Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@DeWaRs1206](https://community.netdata.cloud/u/DeWaRs1206)
#### Post date: [July 13, 2023, 2:18pm UTC](https://community.netdata.cloud/t/error-netdata-dbengine-long-term-page-stats-streaming-dbengine-storage-tiers/4392/1 "2023-07-13T14:18:30Z")
Hello,
I have a Netdata “master” which received streaming info from around 20 other servers .
After a while (maybe every 2 weeks) I receive this type of error for every servers:
```auto
SERVER is critical, `netdata.dbengine_long_term_page_stats` (*dbengine* ), **10min dbengine global flushing errors =**
```
I don’t really understand what this means …
My Netdata “master” configuration is the following:
```auto
[global]
hostname = NETDATA-MASTER-PROD
enabled = yes
[db]
mode = dbengine
update every = 1
storage tiers = 3
dbengine multihost disk space MB = 1100
dbengine tier 1 multihost disk space MB = 330
dbengine tier 2 multihost disk space MB = 67
cache directory = /home/netdata
[web]
bind to = *
web files owner = root
web files group = netdata
[directories]
cache = /home/netdata
home = /home/netdata
```
I have disk space available as well as ram / CPU on my Master:
Version of the master is
```auto
netdata v1.38.1
```
All servers are running on Ubuntu 18.01
Is this error caused by a miss configuration somewhere ?
Anyone have any idea what needs to change to avoid such issue ?
Thanks for your help !
DeWaRs
---
### Author:  [@Stelios\_Fragkakis](https://community.netdata.cloud/u/Stelios_Fragkakis)
#### Post date: [July 13, 2023, 3:39pm UTC](https://community.netdata.cloud/t/error-netdata-dbengine-long-term-page-stats-streaming-dbengine-storage-tiers/4392/2 "2023-07-13T15:39:04Z")
hi @DeWaRs1206 , The configuration look ok, but before we can dig into this further – would it be possible to upgrade to a more recent version of netdata?
Some additional questions
Do you receive this error on the parent node, or all or some of the children ?
What is the type of storage on those ?
---
### Author:  [@DeWaRs1206](https://community.netdata.cloud/u/DeWaRs1206)
#### Post date: [July 14, 2023, 6:01am UTC](https://community.netdata.cloud/t/error-netdata-dbengine-long-term-page-stats-streaming-dbengine-storage-tiers/4392/3 "2023-07-14T06:01:44Z")
Hello @Stelios_Fragkakis
Thansk for your answer. I’m using RPM package for the installation and 1.38 is the latest version available.
[https://repo.netdata.cloud/repos/stable/ubuntu/bionic/](https://repo.netdata.cloud/repos/stable/ubuntu/bionic/)
The error is on almost all children I would say, the alarm is sent by the parent.
The config on the children is the following:
```auto
[global]
hostname = RABBIT-MEMCACHE-PROD
enabled = yes
[web]
bind to = *
web files owner = root
web files group = netdata
```
Version on the children is
```auto
root@test:~# netdata -v
netdata v1.37.0-17-nightly
```
Error log on the last impacted server:
```auto
2023-07-14 03:58:42: tc-qos-helper.sh: WARNING: FireQOS is not installed on this system. Use FireQOS to apply traffic QoS and expose the class names to netdata. Check https://github.com/netdata/netdata/tree/master/collectors/tc.plugin#tcplugin
2023-07-14 03:58:42: tc-qos-helper.sh: WARNING: Cannot find file '/usr/lib/netdata/conf.d/tc-qos-helper.conf'.
2023-07-14 03:58:42: tc-qos-helper.sh: WARNING: Cannot find file '/etc/netdata/tc-qos-helper.conf'.
2023-07-14 04:14:44: netdata INFO : MAIN : Creating new data and journal files in path /var/cache/netdata/dbengine
2023-07-14 04:14:44: netdata INFO : MAIN : Created data file "/var/cache/netdata/dbengine/datafile-1-0000005933.ndf".
2023-07-14 04:14:44: netdata INFO : MAIN : Created journal file "/var/cache/netdata/dbengine/journalfile-1-0000005933.njf".
2023-07-14 04:31:49: netdata INFO : MAIN : Deleting data file "/var/cache/netdata/dbengine/datafile-1-0000005915.ndf".
2023-07-14 04:31:49: netdata INFO : MAIN : Deleting data and journal file pair.
2023-07-14 04:31:49: netdata INFO : MAIN : Deleted journal file "/var/cache/netdata/dbengine/journalfile-1-0000005915.njf".
2023-07-14 04:31:49: netdata INFO : MAIN : Deleted data file "/var/cache/netdata/dbengine/datafile-1-0000005915.ndf".
2023-07-14 04:31:49: netdata INFO : MAIN : Reclaimed 14729216 bytes of disk space.
2023-07-14 04:35:30: netdata INFO : MAIN : METADATA: Checking dimensions starting after row 0
2023-07-14 04:35:30: netdata INFO : MAIN : METADATA: Checked 3464, deleted 0 -- will resume after row 0 in 3600 seconds
2023-07-14 04:58:44: tc-qos-helper.sh: WARNING: FireQOS is not installed on this system. Use FireQOS to apply traffic QoS and expose the class names to netdata. Check https://github.com/netdata/netdata/tree/master/collectors/tc.plugin#tcplugin
2023-07-14 04:58:44: tc-qos-helper.sh: WARNING: Cannot find file '/usr/lib/netdata/conf.d/tc-qos-helper.conf'.
2023-07-14 04:58:44: tc-qos-helper.sh: WARNING: Cannot find file '/etc/netdata/tc-qos-helper.conf'.
2023-07-14 05:11:42: netdata INFO : ANALYTICS : /usr/libexec/netdata/plugins.d/anonymous-statistics.sh 'META' '-' '-'
2023-07-14 05:35:31: netdata INFO : MAIN : METADATA: Checking dimensions starting after row 0
2023-07-14 05:35:31: netdata INFO : MAIN : METADATA: Checked 3464, deleted 0 -- will resume after row 0 in 3600 seconds
2023-07-14 05:57:14: netdata INFO : MAIN : Creating new data and journal files in path /var/cache/netdata/dbengine
2023-07-14 05:57:14: netdata INFO : MAIN : Created data file "/var/cache/netdata/dbengine/datafile-1-0000005934.ndf".
2023-07-14 05:57:14: netdata INFO : MAIN : Created journal file "/var/cache/netdata/dbengine/journalfile-1-0000005934.njf".
```
About the type of storage, I’m not sure what you mean, maybe
```auto
root@ns3131326:/var/log/netdata# fdisk -k
fdisk: invalid option -- 'k'
Try 'fdisk --help' for more information.
root@ns3131326:/var/log/netdata# fdisk -l
Disk /dev/nvme0n1: 419.2 GiB, 450098159616 bytes, 879097968 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 52D39457-95A3-49AF-B66F-EEE7E5413E1E
Device Start End Sectors Size Type
/dev/nvme0n1p1 2048 1048575 1046528 511M EFI System
/dev/nvme0n1p2 1048576 2095103 1046528 511M Linux RAID
/dev/nvme0n1p3 2095104 43053055 40957952 19.5G Linux RAID
/dev/nvme0n1p4 43053056 878036991 834983936 398.2G Linux RAID
/dev/nvme0n1p5 878036992 879083519 1046528 511M Linux swap
Disk /dev/nvme1n1: 419.2 GiB, 450098159616 bytes, 879097968 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: E6F13B79-A2CC-42E2-A705-1F531DAB9A5B
Device Start End Sectors Size Type
/dev/nvme1n1p1 2048 1048575 1046528 511M EFI System
/dev/nvme1n1p2 1048576 2095103 1046528 511M Linux RAID
/dev/nvme1n1p3 2095104 43053055 40957952 19.5G Linux RAID
/dev/nvme1n1p4 43053056 878036991 834983936 398.2G Linux RAID
/dev/nvme1n1p5 878036992 879083519 1046528 511M Linux swap
Disk /dev/md2: 511 MiB, 535756800 bytes, 1046400 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/md3: 19.5 GiB, 20970405888 bytes, 40957824 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/md4: 398.2 GiB, 427511709696 bytes, 834983808 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
```
Another information is, if I delete (which I just did) the folder /home/netdata which contains:
The alarm then stops, but will start again in a couple of weeks.
Best regards
Emmanuel
---
### Author:  [@ralphm](https://community.netdata.cloud/u/ralphm)
#### Post date: [July 14, 2023, 8:33am UTC](https://community.netdata.cloud/t/error-netdata-dbengine-long-term-page-stats-streaming-dbengine-storage-tiers/4392/4 "2023-07-14T08:33:37Z")
Hi Emmanuel,
Just so we’re on the same page. You mention RPM but then refer to our Ubuntu Bionic repository. Ubuntu uses Debian packaging, not RPMs. If you are indeed using Ubuntu Bionic 18.04, I should point out that this version has reached end-of-life on 2023-05-31. This is why there are no newer packages in the repository you referred to. There are ways to overcome that by using our static builds, but unless you are using Canonical’s Extended Security Maintenance channel as part of Ubuntu Pro, it might be prudent to upgrade your nodes to a newer version of Ubuntu.
The version on the child (1.37.0-17-nightly) is even older. What (version of the) OS is this running on? The file `/etc/lsb-release` should help answer this.
Regardless of the above, @Stelios_Fragkakis will try to help you further with the actual issue you mentioned.
---
### Author:  [@DeWaRs1206](https://community.netdata.cloud/u/DeWaRs1206)
#### Post date: [July 18, 2023, 7:24am UTC](https://community.netdata.cloud/t/error-netdata-dbengine-long-term-page-stats-streaming-dbengine-storage-tiers/4392/5 "2023-07-18T07:24:23Z")
All our servers are running Ubuntu 18.04 .
I will upgrade the Parent serveur in August, but for the rest it will take more time.
This morning, errors started to raise again. I disabled the following config
```auto
dbengine tier 1 multihost disk space MB = 330
dbengine tier 2 multihost disk space MB = 67
```
and restarted Netdata for now.
I you have any other clue until I update the version, please let me know 😉