"relatime,compress-force=zlib,space_cache=v2" the 100%
>>>> cpu has dissapeared, but the shite performance remained.
>>>>
>>>>
>>>> As to the chunk size, there is no information in the article about the
>>>> type of data that
I'm a btrfs user, not a developer; developers can probably provide more
detailed explanation by looking at stack traces in dmesg etc., but it's
possible that there's just no quick fix (yet). I presume these are 1413
_full-volume_ snapshots. Then some operations have to process
ed write (32k) would fill the chunk on a single
>>> disk, thus the IO cost of the operation would be 2 reads (original chunk +
>>> original parity) and 2 writes (new chunk + new parity)
>>>
>>> 2. The maximum compressed write (128k) would require the up
what mount flags do you use?
>>
>> kos
>>
>>
>>
>> - Original Message -
>> From: "Roman Mamedov" <r...@romanrm.net>
>> To: "Konstantin V. Gavrilenko" <k.gavrile...@arhont.com>
>> Cc: "Stefan Priebe -
dov" <r...@romanrm.net>
> To: "Konstantin V. Gavrilenko" <k.gavrile...@arhont.com>
> Cc: "Stefan Priebe - Profihost AG" <s.pri...@profihost.ag>, "Marat Khalili"
> <m...@rqc.ru>, linux-btrfs@vger.kernel.org, "Peter Grandi&quo
>>> I've one system where a single kworker process is using 100%
>>> CPU sometimes a second process comes up with 100% CPU
>>> [btrfs-transacti]. [ ... ]
>> [ ... ]1413 Snapshots. I'm deleting 50 of them every night. But
>> btrfs-cleaner process isn't running / consuming CPU currently.
Reminder
t;Roman Mamedov" <r...@romanrm.net>
> To: "Konstantin V. Gavrilenko" <k.gavrile...@arhont.com>
> Cc: "Stefan Priebe - Profihost AG" <s.pri...@profihost.ag>, "Marat Khalili"
> <m...@rqc.ru>, linux-btrfs@vger.kernel.org, "Peter
V. Gavrilenko" <k.gavrile...@arhont.com>
> Cc: "Stefan Priebe - Profihost AG" <s.pri...@profihost.ag>, "Marat Khalili"
> <m...@rqc.ru>, linux-btrfs@vger.kernel.org, "Peter Grandi"
> <p...@btrfs.list.sabi.co.uk>
> Sent: Wednesday,
V. Gavrilenko" <k.gavrile...@arhont.com>
> Cc: "Stefan Priebe - Profihost AG" <s.pri...@profihost.ag>, "Marat Khalili"
> <m...@rqc.ru>, linux-btrfs@vger.kernel.org, "Peter Grandi"
> <p...@btrfs.list.sabi.co.uk>
> Sent: Wednesday,
ko" <k.gavrile...@arhont.com>
Cc: "Stefan Priebe - Profihost AG" <s.pri...@profihost.ag>, "Marat Khalili"
<m...@rqc.ru>, linux-btrfs@vger.kernel.org, "Peter Grandi"
<p...@btrfs.list.sabi.co.uk>
Sent: Wednesday, 16 August, 2017 2:00:03 P
On Wed, 16 Aug 2017 12:48:42 +0100 (BST)
"Konstantin V. Gavrilenko" wrote:
> I believe the chunk size of 512kb is even worth for performance then the
> default settings on my HW RAID of 256kb.
It might be, but that does not explain the original problem reported at
"Marat Khalili" <m...@rqc.ru>, linux-btrfs@vger.kernel.org
Sent: Wednesday, 16 August, 2017 11:26:38 AM
Subject: Re: slow btrfs with a single kworker process using 100% CPU
Am 16.08.2017 um 11:02 schrieb Konstantin V. Gavrilenko:
> Could be similar issue as what I had recently, with the RAI
t;m...@rqc.ru>, linux-btrfs@vger.kernel.org
> Sent: Wednesday, 16 August, 2017 10:37:43 AM
> Subject: Re: slow btrfs with a single kworker process using 100% CPU
>
> Am 16.08.2017 um 08:53 schrieb Marat Khalili:
>>> I've one system where a single kworker
t;Stefan Priebe - Profihost AG" <s.pri...@profihost.ag>
To: "Marat Khalili" <m...@rqc.ru>, linux-btrfs@vger.kernel.org
Sent: Wednesday, 16 August, 2017 10:37:43 AM
Subject: Re: slow btrfs with a single kworker process using 100% CPU
Am 16.08.2017 um 08:53 schrieb Marat Khalili:
Am 16.08.2017 um 08:53 schrieb Marat Khalili:
>> I've one system where a single kworker process is using 100% CPU
>> sometimes a second process comes up with 100% CPU [btrfs-transacti]. Is
>> there anything i can do to get the old speed again or find the culprit?
>
> 1. Do you use quotas
I've one system where a single kworker process is using 100% CPU
sometimes a second process comes up with 100% CPU [btrfs-transacti]. Is
there anything i can do to get the old speed again or find the culprit?
1. Do you use quotas (qgroups)?
2. Do you have a lot of snapshots? Have you deleted
Hello,
I've one system where a single kworker process is using 100% CPU
sometimes a second process comes up with 100% CPU [btrfs-transacti]. Is
there anything i can do to get the old speed again or find the culprit?
Greets,
Stefan
--
To unsubscribe from this list: send the line "unsubscribe
17 matches
Mail list logo