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Posted to user@cassandra.apache.org by A <ht...@yahoo.com.INVALID> on 2019/10/19 16:46:26 UTC

Ram & Space...

What are minimum and recommended ram and space requirements to run Cassandra in AWS?
Every like 24 hours Cassandra stops working. Even though the service is active, it’s dead and non responsive until I restart the service.
Top shows %MEM slowly creeping upwards. Yesterday it showed 75%. 
In the logs it throws that Cassandra is running in degraded mode and that I should consider adding more space to the free 25G...
Thanks in advance for your help. Newbie here... lots to learn.
Angel

Sent from Yahoo Mail for iPhone

Re: Ram & Space...

Posted by daemeon reiydelle <da...@gmail.com>.
pretty clear evidence of a memory leak, tombstone problem (still memory),
etc.

If this is Apache, then you may need to do some heap dumps and see what is
going on (if it is java heap that is OOM'ing, which I suspect. Might want
to do some periodic vmstat or equivalent (brute force might be screen shots
of top -o mem first to see which processes are leaking?

But (smiling) could be the spirits telling you to actually USE the cluster?

<======>
Made weak by time and fate, but strong in will,
To strive, to seek, to find, and not to yield.
Ulysses - A. Lord Tennyson

*Daemeon C.M. Reiydelle*

*email: daemeonr@gmail.com <da...@gmail.com>*
*San Francisco 1.415.501.0198/Skype daemeon.c.m.reiydelle*



On Wed, Oct 23, 2019 at 1:45 PM Paul Chandler <pa...@redshots.com> wrote:

> We had what sounds like a similar problem with a DSE cluster a little
> while ago, It was not being used, and had no tables in it. The memory kept
> rising until it was killed by the oom-killer.
>
> We spent along time trying to get to the bottom of the problem, but it
> suddenly stopped when the developers started using the cluster. Perhaps the
> same will happen when you start using yours.
>
> Thanks
>
> Paul
>
> On 23 Oct 2019, at 18:26, A <ht...@yahoo.com.INVALID> wrote:
>
> Thank you. But I have added any tables yet. It’s empty...
>
>
> Sent from Yahoo Mail for iPhone
> <https://overview.mail.yahoo.com/?.src=iOS>
>
> On Tuesday, October 22, 2019, 1:15 AM, Matthias Pfau <
> matthias.pfau@tutao.de.INVALID> wrote:
>
> Did you check nodetool status and logs? If so, what is reported?
>
> Regarding that more and more memory is used. This might be a problem with
> your table design. I would start analyzing nodetool tablestats output. It
> reports how much memory (especially off heap) is used by which table.
>
> Best,
> Matthias
>
>
> Oct 19, 2019, 18:46 by httpex@yahoo.com.INVALID:
> What are minimum and recommended ram and space requirements to run
> Cassandra in AWS?
>
> Every like 24 hours Cassandra stops working. Even though the service is
> active, it’s dead and non responsive until I restart the service.
>
> Top shows %MEM slowly creeping upwards. Yesterday it showed 75%.
>
> In the logs it throws that Cassandra is running in degraded mode and that
> I should consider adding more space to the free 25G...
>
> Thanks in advance for your help. Newbie here... lots to learn.
>
> Angel
>
>
> Sent from Yahoo Mail for iPhone
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@cassandra.apache.org
> For additional commands, e-mail: user-help@cassandra.apache.org
>
>
>

Re: Ram & Space...

Posted by Paul Chandler <pa...@redshots.com>.
We had what sounds like a similar problem with a DSE cluster a little while ago, It was not being used, and had no tables in it. The memory kept rising until it was killed by the oom-killer.

We spent along time trying to get to the bottom of the problem, but it suddenly stopped when the developers started using the cluster. Perhaps the same will happen when you start using yours.

Thanks 

Paul

> On 23 Oct 2019, at 18:26, A <ht...@yahoo.com.INVALID> wrote:
> 
> Thank you. But I have added any tables yet. It’s empty...
> 
> 
> Sent from Yahoo Mail for iPhone <https://overview.mail.yahoo.com/?.src=iOS>
> 
> On Tuesday, October 22, 2019, 1:15 AM, Matthias Pfau <ma...@tutao.de.INVALID> wrote:
> 
> Did you check nodetool status and logs? If so, what is reported?
> 
> Regarding that more and more memory is used. This might be a problem with your table design. I would start analyzing nodetool tablestats output. It reports how much memory (especially off heap) is used by which table.
> 
> Best,
> Matthias
> 
> 
> Oct 19, 2019, 18:46 by httpex@yahoo.com.INVALID <ma...@yahoo.com.INVALID>:
> What are minimum and recommended ram and space requirements to run Cassandra in AWS?
> 
> Every like 24 hours Cassandra stops working. Even though the service is active, it’s dead and non responsive until I restart the service.
> 
> Top shows %MEM slowly creeping upwards. Yesterday it showed 75%. 
> 
> In the logs it throws that Cassandra is running in degraded mode and that I should consider adding more space to the free 25G...
> 
> Thanks in advance for your help. Newbie here... lots to learn.
> 
> Angel
> 
> 
> Sent from Yahoo Mail for iPhone
> 
> 
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: user-unsubscribe@cassandra.apache.org <ma...@cassandra.apache.org>
> For additional commands, e-mail: user-help@cassandra.apache.org <ma...@cassandra.apache.org>
>

Re: Ram & Space...

Posted by A <ht...@yahoo.com.INVALID>.
Thank you. But I have added any tables yet. It’s empty...


Sent from Yahoo Mail for iPhone


On Tuesday, October 22, 2019, 1:15 AM, Matthias Pfau <ma...@tutao.de.INVALID> wrote:

Did you check nodetool status and logs? If so, what is reported?

Regarding that more and more memory is used. This might be a problem with your table design. I would start analyzing nodetool tablestats output. It reports how much memory (especially off heap) is used by which table.

Best,
Matthias


Oct 19, 2019, 18:46 by httpex@yahoo.com.INVALID:
What are minimum and recommended ram and space requirements to run Cassandra in AWS?

Every like 24 hours Cassandra stops working. Even though the service is active, it’s dead and non responsive until I restart the service.

Top shows %MEM slowly creeping upwards. Yesterday it showed 75%. 

In the logs it throws that Cassandra is running in degraded mode and that I should consider adding more space to the free 25G...

Thanks in advance for your help. Newbie here... lots to learn.

Angel


Sent from Yahoo Mail for iPhone


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Re: Ram & Space...

Posted by Matthias Pfau <ma...@tutao.de.INVALID>.
Did you check nodetool status and logs? If so, what is reported?

Regarding that more and more memory is used. This might be a problem with your table design. I would start analyzing nodetool tablestats output. It reports how much memory (especially off heap) is used by which table.

Best,
Matthias


Oct 19, 2019, 18:46 by httpex@yahoo.com.INVALID:
What are minimum and recommended ram and space requirements to run Cassandra in AWS?

Every like 24 hours Cassandra stops working. Even though the service is active, it’s dead and non responsive until I restart the service.

Top shows %MEM slowly creeping upwards. Yesterday it showed 75%. 

In the logs it throws that Cassandra is running in degraded mode and that I should consider adding more space to the free 25G...

Thanks in advance for your help. Newbie here... lots to learn.

Angel


Sent from Yahoo Mail for iPhone


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