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https://issues.apache.org/jira/browse/HBASE-17097?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anoop Sam John updated HBASE-17097:
-----------------------------------
Description:
{quote}
\# Uncomment below if you intend to use off heap cache. For example, to
allocate 8G of
\# offheap, set the value to "8G".
\# export HBASE_OFFHEAPSIZE=1G
{quote}
This is what we have in hbase-env.sh now. We need more notes around this and
some suggestion. May be more details in book also. This depends on whether we
want L2 off heap BC as the default data cache in 2.0. (I would like to and will
open a jira soon) Also if users use off heap MSLAB pool, then that also to be
added up..
As of now we will use a ByteBufferPool which pool direct BBs and this is ON by
default. The max size, this pool can keep is 2 MB * 2 * #handlers.
Will add more details as we turn ON other features.
was:
{quote}
# Uncomment below if you intend to use off heap cache. For example, to allocate
8G of
# offheap, set the value to "8G".
# export HBASE_OFFHEAPSIZE=1G
{quote}
This is what we have in hbase-env.sh now. We need more notes around this and
some suggestion. May be more details in book also. This depends on whether we
want L2 off heap BC as the default data cache in 2.0. (I would like to and will
open a jira soon) Also if users use off heap MSLAB pool, then that also to be
added up..
As of now we will use a ByteBufferPool which pool direct BBs and this is ON by
default. The max size, this pool can keep is 2 MB * 2 * #handlers.
Will add more details as we turn ON other features.
> Documentation for max off heap configuration
> --------------------------------------------
>
> Key: HBASE-17097
> URL: https://issues.apache.org/jira/browse/HBASE-17097
> Project: HBase
> Issue Type: Sub-task
> Affects Versions: 2.0.0
> Reporter: Anoop Sam John
> Fix For: 2.0.0
>
>
> {quote}
> \# Uncomment below if you intend to use off heap cache. For example, to
> allocate 8G of
> \# offheap, set the value to "8G".
> \# export HBASE_OFFHEAPSIZE=1G
> {quote}
> This is what we have in hbase-env.sh now. We need more notes around this and
> some suggestion. May be more details in book also. This depends on whether we
> want L2 off heap BC as the default data cache in 2.0. (I would like to and
> will open a jira soon) Also if users use off heap MSLAB pool, then that also
> to be added up..
> As of now we will use a ByteBufferPool which pool direct BBs and this is ON
> by default. The max size, this pool can keep is 2 MB * 2 * #handlers.
> Will add more details as we turn ON other features.
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