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Posted to user@cassandra.apache.org by Mich Talebzadeh <mi...@peridale.co.uk> on 2015/04/22 11:34:15 UTC
ROperationTimedOut in selerct count statement in cqlsh
Hi,
I have a table of 300,000 rows.
When I try to do a simple
cqlsh:ase> select count(1) from t;
OperationTimedOut: errors={}, last_host=127.0.0.1
Appreciate any feedback
Thanks,
Mich
NOTE: The information in this email is proprietary and confidential. This
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subsidiaries or their employees, unless expressly so stated. It is the
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therefore neither Peridale Ltd, its subsidiaries nor their employees accept
any responsibility.
Re: ROperationTimedOut in selerct count statement in cqlsh
Posted by Umang Shah <sh...@gmail.com>.
In that case you have to increase the readtimeout as some suggested.
On Wed, Apr 22, 2015 at 10:06 AM, Mich Talebzadeh <mi...@peridale.co.uk>
wrote:
> Thanks Umang.
>
>
>
> I have 9GB of memory free here out of 24GB
>
>
>
> cassandra@rhes564::/apps/cassandra> free
>
> total used free shared buffers cached
>
> Mem: 24675328 14774532 9900796 0 539900 9097992
>
> -/+ buffers/cache: 5136640 19538688
>
> Swap: 24579440 668 24578772
>
>
>
> But I am still getting the same error
>
>
>
> cqlsh:ase> select count(1) from t;
>
> OperationTimedOut: errors={}, last_host=127.0.0.1
>
>
>
> thx
>
>
>
> Mich Talebzadeh
>
>
>
> http://talebzadehmich.wordpress.com
>
>
>
> Author of the books* "A Practitioner’s Guide to Upgrading to Sybase** ASE
> 15", **ISBN 978-0-9563693-0-7*.
>
> co-author *"Sybase Transact SQL Guidelines Best Practices", ISBN
> 978-0-9759693-0-4*
>
> *Publications due shortly:*
>
> *Creating in-memory Data Grid for Trading Systems with Oracle TimesTen and
> Coherence Cache*
>
> *Oracle and Sybase, Concepts and Contrasts*, ISBN: 978-0-9563693-1-4, volume
> one out shortly
>
>
>
> NOTE: The information in this email is proprietary and confidential. This
> message is for the designated recipient only, if you are not the intended
> recipient, you should destroy it immediately. Any information in this
> message shall not be understood as given or endorsed by Peridale Ltd, its
> subsidiaries or their employees, unless expressly so stated. It is the
> responsibility of the recipient to ensure that this email is virus free,
> therefore neither Peridale Ltd, its subsidiaries nor their employees accept
> any responsibility.
>
>
>
> *From:* Umang Shah [mailto:shahumang4@gmail.com]
> *Sent:* 22 April 2015 10:44
> *To:* user@cassandra.apache.org
> *Subject:* Re: ROperationTimedOut in selerct count statement in cqlsh
>
>
>
> HI,
>
>
>
> It is common problem, if your machine has 4 GB of RAM then you can only
> retrieve records about 200000 so you have to increase the RAM of your
> system to avoid this problem..
>
>
>
> Thanks,
>
> Umang Shah
>
>
>
> On Wed, Apr 22, 2015 at 9:34 AM, Mich Talebzadeh <mi...@peridale.co.uk>
> wrote:
>
> Hi,
>
>
>
> I have a table of 300,000 rows.
>
>
>
> When I try to do a simple
>
>
>
> cqlsh:ase> select count(1) from t;
>
> OperationTimedOut: errors={}, last_host=127.0.0.1
>
>
>
> Appreciate any feedback
>
>
>
> Thanks,
>
>
>
> Mich
>
>
>
>
>
> NOTE: The information in this email is proprietary and confidential. This
> message is for the designated recipient only, if you are not the intended
> recipient, you should destroy it immediately. Any information in this
> message shall not be understood as given or endorsed by Peridale Ltd, its
> subsidiaries or their employees, unless expressly so stated. It is the
> responsibility of the recipient to ensure that this email is virus free,
> therefore neither Peridale Ltd, its subsidiaries nor their employees accept
> any responsibility.
>
>
>
>
>
>
>
> --
>
> Regards,
>
> Umang Shah
>
> +919886829019
>
--
Regards,
Umang Shah
+919886829019
RE: ROperationTimedOut in selerct count statement in cqlsh
Posted by Mich Talebzadeh <mi...@peridale.co.uk>.
Thanks Umang.
I have 9GB of memory free here out of 24GB
cassandra@rhes564::/apps/cassandra> free
total used free shared buffers cached
Mem: 24675328 14774532 9900796 0 539900 9097992
-/+ buffers/cache: 5136640 19538688
Swap: 24579440 668 24578772
But I am still getting the same error
cqlsh:ase> select count(1) from t;
OperationTimedOut: errors={}, last_host=127.0.0.1
thx
Mich Talebzadeh
http://talebzadehmich.wordpress.com
Author of the books "A Practitioner’s Guide to Upgrading to Sybase ASE 15", ISBN 978-0-9563693-0-7.
co-author "Sybase Transact SQL Guidelines Best Practices", ISBN 978-0-9759693-0-4
Publications due shortly:
Creating in-memory Data Grid for Trading Systems with Oracle TimesTen and Coherence Cache
Oracle and Sybase, Concepts and Contrasts, ISBN: 978-0-9563693-1-4, volume one out shortly
NOTE: The information in this email is proprietary and confidential. This message is for the designated recipient only, if you are not the intended recipient, you should destroy it immediately. Any information in this message shall not be understood as given or endorsed by Peridale Ltd, its subsidiaries or their employees, unless expressly so stated. It is the responsibility of the recipient to ensure that this email is virus free, therefore neither Peridale Ltd, its subsidiaries nor their employees accept any responsibility.
From: Umang Shah [mailto:shahumang4@gmail.com]
Sent: 22 April 2015 10:44
To: user@cassandra.apache.org
Subject: Re: ROperationTimedOut in selerct count statement in cqlsh
HI,
It is common problem, if your machine has 4 GB of RAM then you can only retrieve records about 200000 so you have to increase the RAM of your system to avoid this problem..
Thanks,
Umang Shah
On Wed, Apr 22, 2015 at 9:34 AM, Mich Talebzadeh <mi...@peridale.co.uk> wrote:
Hi,
I have a table of 300,000 rows.
When I try to do a simple
cqlsh:ase> select count(1) from t;
OperationTimedOut: errors={}, last_host=127.0.0.1
Appreciate any feedback
Thanks,
Mich
NOTE: The information in this email is proprietary and confidential. This message is for the designated recipient only, if you are not the intended recipient, you should destroy it immediately. Any information in this message shall not be understood as given or endorsed by Peridale Ltd, its subsidiaries or their employees, unless expressly so stated. It is the responsibility of the recipient to ensure that this email is virus free, therefore neither Peridale Ltd, its subsidiaries nor their employees accept any responsibility.
--
Regards,
Umang Shah
+919886829019
Re: ROperationTimedOut in selerct count statement in cqlsh
Posted by Umang Shah <sh...@gmail.com>.
HI,
It is common problem, if your machine has 4 GB of RAM then you can only
retrieve records about 200000 so you have to increase the RAM of your
system to avoid this problem..
Thanks,
Umang Shah
On Wed, Apr 22, 2015 at 9:34 AM, Mich Talebzadeh <mi...@peridale.co.uk>
wrote:
> Hi,
>
>
>
> I have a table of 300,000 rows.
>
>
>
> When I try to do a simple
>
>
>
> cqlsh:ase> select count(1) from t;
>
> OperationTimedOut: errors={}, last_host=127.0.0.1
>
>
>
> Appreciate any feedback
>
>
>
> Thanks,
>
>
>
> Mich
>
>
>
>
>
> NOTE: The information in this email is proprietary and confidential. This
> message is for the designated recipient only, if you are not the intended
> recipient, you should destroy it immediately. Any information in this
> message shall not be understood as given or endorsed by Peridale Ltd, its
> subsidiaries or their employees, unless expressly so stated. It is the
> responsibility of the recipient to ensure that this email is virus free,
> therefore neither Peridale Ltd, its subsidiaries nor their employees accept
> any responsibility.
>
>
>
--
Regards,
Umang Shah
+919886829019