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https://issues.apache.org/jira/browse/IGNITE-8536?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alexey Goncharuk updated IGNITE-8536:
-------------------------------------
    Description: 
We need to configure data region checkpoint buffer size when we start Ignite on 
computer with  limited resources, for example AWS t2.micro

In current implementation Ignite will allocate 100Mb buffers, it should be 
configurable.

Also we need to improve message printed in log: 
current message: 
{code}
[2018-05-18T03:43:01,449][INFO ][exchange-worker-#51][PageMemoryImpl] Started 
page memory [memoryAllocated=100.0 MiB, pages=24937, tableSize=1.4 MiB, 
checkpointBuffer=100.0 MiB]
{code}

Lets add region name and rename "checkpointBuffer" to  "data region buffer".


  was:
We need to configure data region checkpoint buffer size when we start Ignite on 
computer with  limiter resources, for example AWS t2.micro

In current implementation Ignite will allocate 100Mb buffers, it should be 
configurable.

Also we need to improve message printed in log: 
current message: 
{code}
[2018-05-18T03:43:01,449][INFO ][exchange-worker-#51][PageMemoryImpl] Started 
page memory [memoryAllocated=100.0 MiB, pages=24937, tableSize=1.4 MiB, 
checkpointBuffer=100.0 MiB]
{code}

Lets add region name and rename "checkpointBuffer" to  "data region buffer".



> DirectMemoryRegion: Introduce checkpoint buffer  configuration and improve 
> logging o start
> ------------------------------------------------------------------------------------------
>
>                 Key: IGNITE-8536
>                 URL: https://issues.apache.org/jira/browse/IGNITE-8536
>             Project: Ignite
>          Issue Type: Improvement
>          Components: persistence
>    Affects Versions: 2.4
>            Reporter: Alexey Kuznetsov
>            Assignee: Alexey Goncharuk
>            Priority: Major
>
> We need to configure data region checkpoint buffer size when we start Ignite 
> on computer with  limited resources, for example AWS t2.micro
> In current implementation Ignite will allocate 100Mb buffers, it should be 
> configurable.
> Also we need to improve message printed in log: 
> current message: 
> {code}
> [2018-05-18T03:43:01,449][INFO ][exchange-worker-#51][PageMemoryImpl] Started 
> page memory [memoryAllocated=100.0 MiB, pages=24937, tableSize=1.4 MiB, 
> checkpointBuffer=100.0 MiB]
> {code}
> Lets add region name and rename "checkpointBuffer" to  "data region buffer".



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