Re: Cache updates slow on Linux Vs Windows

[Ilya Kasnacheev]

Hello!

I was running this case on Linux and it took 2 seconds (no PME messages).

It was not my intent to compare Windows vs Linux performance, there are
just known issues for Apache Ignite discovery on Windows where it takes
much longer to scan ports. However, I think the bottom of it is just slow
I/O. Ignite has to write a lot of data even for empty caches (1024
partitions, a few files for each) so it can take prolonged time with slow
I/O.

Regards.
-- 
Ilya Kasnacheev


пт, 18 янв. 2019 г. в 13:39, ihorps :

> hi all
>
> I don't have exact example but I remember that I was running once my
> prototype ignite app on Windows (all other cases were running under Ubuntu)
> and I recognized that it was "slightly" faster.
> I did give too much attention to it by thinking that was just my personal
> feel and I could be mistaken. But seems to be I'm not alone here...
>
>
>
> --
> Sent from: http://apache-ignite-users.70518.x6.nabble.com/
>

Re: Cache updates slow on Linux Vs Windows

[ihorps]

hi all

I don't have exact example but I remember that I was running once my
prototype ignite app on Windows (all other cases were running under Ubuntu)
and I recognized that it was "slightly" faster.
I did give too much attention to it by thinking that was just my personal
feel and I could be mistaken. But seems to be I'm not alone here...



--
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Re: Cache updates slow on Linux Vs Windows

[Павлухин Иван]

I suppose that Windows is faster in particular case. Am I wrong?

пн, 14 янв. 2019 г. в 18:00, ilya.kasnacheev :
>
> Hello!
>
> Did you figure out anything? I went through your log but did not have any
> exact ideas. Is it possible that Windows node is slowed down by very active
> I/O?
>
> Regards,
>
>
>
> --
> Sent from: http://apache-ignite-users.70518.x6.nabble.com/



-- 
Best regards,
Ivan Pavlukhin

Re: Cache updates slow on Linux Vs Windows

[ilya.kasnacheev]

Hello!

Did you figure out anything? I went through your log but did not have any
exact ideas. Is it possible that Windows node is slowed down by very active
I/O?

Regards,



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Re: Cache updates slow on Linux Vs Windows

[rj85]

Hi Ilya,

Thanks for your response. I am attaching a session log from yesterday.
Please look into this and advise.

Notice that the call comes in at 8:56:59.952.

The app makes the update call at 8:37:00.021

After that there is a lot of Ignite chatter for about 12 sec.. 

The app starts logging again at 08:37:12.849

I must admit this this was a particularly bad session. Most complete within
6-7 sec. But even that is too much.

Hoping that this longer session log will help you identify the root cause.

regards
-Rajul


affected-session-linux-00.txt

  



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Re: Cache updates slow on Linux Vs Windows

[Ilya Kasnacheev]

Hello!

Can you please provide logs from affected nodes? It's hard to say anything
specific otherwise.

Regards,
-- 
Ilya Kasnacheev


вс, 23 дек. 2018 г. в 03:03, rj85 :

> Hi,
>
> I am working on a Spring Boot application. Apache ignite is used as the
> Caching mechanism. Apache Ignite is embedded within the app. Using latest
> 2.7.0 version. The cache is lightning fast on Windows machine. However,
> after deploying it on Linux VM, I am seeing noticable lags. One particular
> operation where we save to a cache responds within a sec when running on
> Windows. However, when the app is running on Linux VM, response takes at
> least 5-6 sec. Sometimes, even more.
>
> Heap size on Linux is double that of Windows.
>
> I turned apache ignite debug messages on and notice a lot of "Timeout has
> occurred" debug messages. For sure, I see them on Windows as well. BUt
> there
> are lot more of these on Linux. Wondering if these might help us with the
> solution. Some observations
>
>1) There are lot more timeout messages on Linux during the application
> startup compared to Windows. I am attaching two files with the logs
> containing timeout messages.
>
>2) During the operation I described above, there are no timeout messages
> displayed in Windows. But a lot of those on Linux.
>
> Please advise what can be done to resolve this?
>
>
>
> --
> Sent from: http://apache-ignite-users.70518.x6.nabble.com/
>

Cache updates slow on Linux Vs Windows

[rj85]

Hi,

I am working on a Spring Boot application. Apache ignite is used as the
Caching mechanism. Apache Ignite is embedded within the app. Using latest
2.7.0 version. The cache is lightning fast on Windows machine. However,
after deploying it on Linux VM, I am seeing noticable lags. One particular
operation where we save to a cache responds within a sec when running on
Windows. However, when the app is running on Linux VM, response takes at
least 5-6 sec. Sometimes, even more.

Heap size on Linux is double that of Windows. 

I turned apache ignite debug messages on and notice a lot of "Timeout has
occurred" debug messages. For sure, I see them on Windows as well. BUt there
are lot more of these on Linux. Wondering if these might help us with the
solution. Some observations

   1) There are lot more timeout messages on Linux during the application
startup compared to Windows. I am attaching two files with the logs
containing timeout messages.

   2) During the operation I described above, there are no timeout messages
displayed in Windows. But a lot of those on Linux.

Please advise what can be done to resolve this?



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