[jira] [Updated] (HBASE-15555) Memory Management

["stack (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-15555?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

stack updated HBASE-15555:
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    Attachment: download.svg

Start of a diagram identifying current bigbuffer allocations.

> Memory Management
> -----------------
>
>                 Key: HBASE-15555
>                 URL: https://issues.apache.org/jira/browse/HBASE-15555
>             Project: HBase
>          Issue Type: Umbrella
>            Reporter: stack
>         Attachments: download.svg
>
>
> Umbrella issue on memory management. One-stop shop to learn how we're doing it, tenets, and work to be done
> Subtasks include:
> + Map of memory allocation and recycling landscape
> + Where are we allocating when we could be recycling
> + MSLAB and G1GC don't go together?
> + Enable MSLAB pool always?
> + With offheap allocations, less GC but it runs for longer?
> + Better heuristics recycling: e.g. HBASE-15525 OutOfMemory could occur when using BoundedByteBufferPool during RPC bursts
> + See if can do DFSClient buffer reuse: HBASE-15506 FSDataOutputStream.write() allocates new byte buffer on each operation
> What else?



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