Quota exceeded on dataset <...>/.system/cores

TrueNAS General
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1

I remember after updating to one of the later versions I got flooded with alerts (a few emails an hour):

Quota exceeded on dataset <…>/.system/cores. Used 97.86% (1002.13 MiB of 1 GiB)

So I reverted back to the version I was using and waited for another update and alerts disappeared. I was using 24.04 and then upgraded to 24.10.0 and there were no such alerts, but after updating to 24.10.1 these alerts came back and I’m getting them multiple times a week.

It seems I can’t find anything on the topic :confused:

Anything I should look into? Should I change some settings?

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2

Delete the cores

3

So one of the errors is:

Quota exceeded on dataset Data/.system/cores

How do I delete cores? There’s no such folder .system inside Data :confused: Do I need to enable something to see it?

$ cd /mnt/Data/.system
cd: no such file or directory: /mnt/Data/.system

Update:
Found it with

$ /usr/sbin/zfs list

NAME                                                                       USED  AVAIL  REFER  MOUNTPOINT
Data/.system                                                              2.09G  7.20T  1.47G  legacy
Data/.system/configs-ae32c386e13840b2bf9c0083275e7941                     16.0M  7.20T  16.0M  legacy
Data/.system/cores                                                         127M   897M   127M  legacy
Data/.system/netdata-ae32c386e13840b2bf9c0083275e7941                      483M  7.20T   483M  legacy
Data/.system/nfs                                                           149K  7.20T   149K  legacy
Data/.system/samba4                                                       2.51M  7.20T   687K  legacy

Should I delete the whole .system maybe? My other data pool doesn’t have it at all and mountpoint says legacy :thinking:

4

I wouldn’t advice removing the whole system dataset unless you really had to.

I believe the cores dataset is mounted here:
/var/db/system/cores

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5

Would it be safe to use this?

$ /usr/sbin/zfs destroy Data/.system/cores
6

No. Its a folder not a dataset

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7

Aren’t those core dumps? How often do core files get created? I’ve only ever had one core file in my entire time using FreeNAS and TrueNAS Core.

Maybe it’s apt for a bug report?