The applications on all those servers are same. They are working on same data.
I still don't know why the size of buff/cache is different between different servers.
At 2021-03-12 16:35:09, "Simon Matter" <simon.matter@xxxxxxxxx> wrote:
>Hi,
>
>You said that you have multiple systems running this same application.
>But, do they work with the same data on disk or are there big differences?
>
>From how I understand the figures below, your buff/cache seems a bit low
>if you read a lot of data from disk. If you read a lot of data and
>filesystem caches are slow, it will result in heavy reading from disk
>directly.
>
>One more thing comes to mind: is your hardware behaving fine? I mean, if
>your storag has difficulties to read data from disk due to hardware
>issues, this could also lead to such problems you're facing.
>
>Regards,
>Simon
>
>>
>> yes. I suspect it has something to do with swapping. but swap is turned
>> off on this server.
>> here is the result of free -m.
>> total used free shared buff/cache available
>> Mem: 128174 97449 24400 4158 6325
>> 25232
>> Swap: 0 0 0
>>
>>
>> We have other servers. The processes running on these servers are same.
>> but on other servers, the size of buff/cache is larger than the size on
>> the server which experienced the problem and the size of "free" is smaller
>> than the size on the server which experienced the problem.
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> �� 2021-03-10 14:30:00��"Thomas Stephen Lee" <lee.iitb@xxxxxxxxx> ���
>>>On Sat, Mar 6, 2021 at 6:37 AM yf chu <cyflhn@xxxxxxx> wrote:
>>>>
>>>> no, not vm
>>>>
>>>>
>>>>
>>>>
>>>> | |
>>>> yf chu
>>>> |
>>>> |
>>>> ���䣺cyflhn@xxxxxxx
>>>> |
>>>>
>>>> ǩ���� ���������ʦ ����
>>>>
>>>> On 03/05/2021 23:37, Matthew Miller wrote:
>>>> On Fri, Mar 05, 2021 at 03:54:14PM +0800, yf chu wrote:
>>>> > We have experienced a very weird problem. The load of the server
>>>> machine is very high. We use "pidstat" and find that the disk read io
>>>> is very high.
>>>>
>>>> Is this system a VM?
>>>>
>>>> --
>>>> Matthew Miller
>>>> <mattdm@xxxxxxxxxxxxxxxxx>
>>>> Fedora Project Leader
>>>
>>>Hi,
>>>
>>>Is this due to swapping?
>>>
>>>what is the output of
>>>
>>>free -m
>>>
>>>---
>>>Lee
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>
>
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