Re: [systemd-devel] How to make journald increase logs storage capacity?

[vcaputo]

On Sat, Jan 20, 2018 at 08:28:21PM +0300, 4xy wrote:
> I have limit in 4Gb for journald regardless of the settings I've made. I see
> this line in the manual
> 
> |$ sudo systemctl status systemd-journald ... jan 20 15:44:26 host
> systemd-journald[1218]: System journal (/var/log/journal/) is 4.5G, max
> 4.0G, 0B free. jan 20 15:44:26 host systemd-journald[1218]: Journal started|
> 
> I see this line in the manual.
> 
> > The first pair defaults to 10%  and the second to 15% of the size of the
> > respective file system, but
> each value is capped to 4G.
> 

This is referencing the defaults configured automatically, they're first
computed as a %age, confined to 4G.  The wording of that sentence could
probably be improved in the documentaiton.

> I have about 1Gb logs per day. I would like to have ability to keep them
> about 3 months.
> 

It sounds like you want to keep around 100G of logs:

SystemMaxUse=100G


Note that performance of commands like `journalctl` and even `systemctl
status $unit` drops significantly with large numbers of journals.
As a consequence, you may want to increase the maximum size of the
individual journal files so there are fewer of them:

SystemMaxFileSize=10G

Something like that...

Regards,
Vito Caputo
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Re: [systemd-devel] How to make journald increase logs storage capacity?

[Mantas Mikulėnas]

No, the cap is applied to the described _default_ values only, not to the
ones you configure.

Journal limits are additive; that is, logs are only kept as long as they
satisfy *all* limits, both time and space.

So if you want to keep a large amount of logs, the first thing to do is
raise SystemMaxUse=.

Jan 20 20:53:44 radius systemd-journald[11847]: System journal
(/var/log/journal/09c69409749a4…) is 4.0G, max 16.0G, 11.9G free.

On Sat, Jan 20, 2018, 20:12 Jameson Graef Rollins <
jroll...@finestructure.net> wrote:

> On Sat, Jan 20 2018, 4xy  wrote:
> > I have limit in 4Gb for journald regardless of the settings I've made. I
> > see this line in the manual
> >
> > |$ sudo systemctl status systemd-journald ... jan 20 15:44:26 host
> > systemd-journald[1218]: System journal (/var/log/journal/) is 4.5G, max
> > 4.0G, 0B free. jan 20 15:44:26 host systemd-journald[1218]: Journal
> started|
> >
> > I see this line in the manual.
> >
> >> The first pair defaults to 10%  and the second to 15% of the size of
> the respective file system, but
> > each value is capped to 4G.
> >
> > I have about 1Gb logs per day. I would like to have ability to keep them
> > about 3 months.
> >
> >
> https://stackoverflow.com/questions/48358430/how-to-make-journald-increase-logs-storage-capacity
>
> I'm very interested in the answer to this question.  I did not realize
> there was a hard limit on the amount of logs that journald can support.
> I have a project where we need to indefinitely store logs being produced
> at a rate of many Mb per day.  A 4Gb limit would definitely be
> problematic.
>
> Is there actually a hard limit?  Why?  Can it be circumvented?
>
> Thank you very much for the information.
>
> jamie.
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-- 

Mantas Mikulėnas 
Sent from my phone
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Re: [systemd-devel] How to make journald increase logs storage capacity?

[Jameson Graef Rollins]

On Sat, Jan 20 2018, 4xy  wrote:
> I have limit in 4Gb for journald regardless of the settings I've made. I 
> see this line in the manual
>
> |$ sudo systemctl status systemd-journald ... jan 20 15:44:26 host 
> systemd-journald[1218]: System journal (/var/log/journal/) is 4.5G, max 
> 4.0G, 0B free. jan 20 15:44:26 host systemd-journald[1218]: Journal started|
>
> I see this line in the manual.
>
>> The first pair defaults to 10%  and the second to 15% of the size of the 
>> respective file system, but 
> each value is capped to 4G.
>
> I have about 1Gb logs per day. I would like to have ability to keep them 
> about 3 months.
>
> https://stackoverflow.com/questions/48358430/how-to-make-journald-increase-logs-storage-capacity

I'm very interested in the answer to this question.  I did not realize
there was a hard limit on the amount of logs that journald can support.
I have a project where we need to indefinitely store logs being produced
at a rate of many Mb per day.  A 4Gb limit would definitely be
problematic.

Is there actually a hard limit?  Why?  Can it be circumvented?

Thank you very much for the information.

jamie.


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[systemd-devel] How to make journald increase logs storage capacity?

[4xy]

I have limit in 4Gb for journald regardless of the settings I've made. I 
see this line in the manual


|$ sudo systemctl status systemd-journald ... jan 20 15:44:26 host 
systemd-journald[1218]: System journal (/var/log/journal/) is 4.5G, max 
4.0G, 0B free. jan 20 15:44:26 host systemd-journald[1218]: Journal started|


I see this line in the manual.

The first pair defaults to 10%  and the second to 15% of the size of the respective file system, but 

each value is capped to 4G.

I have about 1Gb logs per day. I would like to have ability to keep them 
about 3 months.


https://stackoverflow.com/questions/48358430/how-to-make-journald-increase-logs-storage-capacity
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