Re: Sudden Query slowdown on our Postgresql Server

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От Sebastian Melchior
Тема Re: Sudden Query slowdown on our Postgresql Server
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Msg-id 08416066-2163-4D4F-AEE9-93FEDECD1CC3@mailz.de
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Ответ на Re: Sudden Query slowdown on our Postgresql Server  (Scott Marlowe <scott.marlowe@gmail.com>)
Ответы Re: Sudden Query slowdown on our Postgresql Server  (Scott Marlowe <scott.marlowe@gmail.com>)
Re: Sudden Query slowdown on our Postgresql Server  (Yeb Havinga <yebhavinga@gmail.com>)
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Hi,

we already used iostat and iotop during times of the slowdown, there is no sudden drop in I/O workload in the times of
theslowdown. Also the iowait does not spike and stays as before. 
So i do not think that this is I/O related. As the disks are SSDs there also still is some "head room" left.

Sebastian

On 23.03.2012, at 05:48, Scott Marlowe wrote:

> I'd suggest the handy troubleshooting tools sar, iostat, vmstat and iotop
>
> On Thu, Mar 22, 2012 at 10:37 PM, Sebastian Melchior <webmaster@mailz.de> wrote:
>> Hi,
>>
>> yeah we log those, those times do not match the times of the slowdown at all. Seems to be unrelated.
>>
>> Sebastian
>>
>>
>> On 23.03.2012, at 01:47, Stephen Frost wrote:
>>
>>> * Sebastian Melchior (webmaster@mailz.de) wrote:
>>>> Does anyone have any idea what could cause this issue or how we can further debug it?
>>>
>>> Are you logging checkpoints?  If not, you should, if so, then see if
>>> they correllate to the time of the slowdown..?
>>>
>>>       Thanks,
>>>
>>>               Stephen
>>
>>
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>
>
> --
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