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From "Ankur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-2975) IPC server should not allocate a buffer for each request
Date Mon, 02 Jun 2008 06:15:45 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-2975?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12601531#action_12601531
] 

Ankur commented on HADOOP-2975:
-------------------------------

This does make sense when we have more than  70 - 80% of request falling below a certain size.
Do we have an idea of  what that size is ?

> IPC server should not allocate a buffer for each request
> --------------------------------------------------------
>
>                 Key: HADOOP-2975
>                 URL: https://issues.apache.org/jira/browse/HADOOP-2975
>             Project: Hadoop Core
>          Issue Type: Improvement
>          Components: ipc
>    Affects Versions: 0.16.0
>            Reporter: Hairong Kuang
>         Attachments: Hadoop-2975-v1.patch
>
>
> Currently the IPC server allocates a buffer for each incoming request. The buffer is
thrown away after the request is serialized. This leads to very inefficient heap utilization.
It would be nicer if all requests from one connection could share a same common buffer since
the ipc server has only one request is being read from a socket at a time.

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