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From Mikael <mikael-arons...@telia.com>
Subject Re: Ignite Performance - Adding new node is not improving SQL query performance
Date Mon, 09 Sep 2019 09:51:15 GMT

If the new node is not part of the baseline topology it will not have 
any persisted data stored so any SQL query will not be of any use on the 
node as it does not have any of the data (at least that is how I 
understand it, I could be wrong here).

If so you would need to add the new node to the baseline topology to see 
any performance improvement, and of course wait for a complete rebalance 
of the data.

 From docs:

"The same tools and APIs can be used to adjust the baseline topology 
throughout the cluster lifetime. It's required if you decide to scale 
out or scale in an existing topology by setting more or fewer nodes that 
will store the data. The sections below show how to use the APIs and tools."


Den 2019-09-09 kl. 11:31, skrev Muhammed Favas:
> Hi,
> I have an ignite cluster with 4 node(each with 8 core, 32 GB RAM and 
> 30 GB Disk)  with native persistence enabled and added to baseline 
> topology. There are two sql table created and loaded with 120 GB data.
> One of my test sql query is taking 8 second with this set up. 
> Currently I am trying various option to reduce the execution time of 
> the query.
> For that, I have added on more node (with same configuration) to the 
> cluster (non- baselined) with the impression that it will reduce the 
>  execution time, but it didn’t. When I checked the CPU utilization of 
> each node, all 4 previously added node’s CPU is utilizing at its best, 
> but the CPU of newly added node is not using much.
> Can you please help me to figure out why it is so and how can I make 
> sure all the nodes CPU is utilizing when I run a distributed query so 
> that my query runs faster.
> Also, what all the additional things I need to do to make my query 
> runs faster.
> *Regards,*
> *Favas ***

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