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https://issues.apache.org/jira/browse/DIRMINA-471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Emmanuel Lecharny closed DIRMINA-471.
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> Reduce SSL buffers overhead
> ---------------------------
>
> Key: DIRMINA-471
> URL: https://issues.apache.org/jira/browse/DIRMINA-471
> Project: MINA
> Issue Type: Improvement
> Components: Filter
> Affects Versions: 1.0.7, 1.1.4
> Environment: NA
> Reporter: Michael Matovsky
> Assignee: Trustin Lee
> Fix For: 2.0.0-M1
>
>
> There is a significant overhead for SSL connections.
> Investigation shows that every SSL connection requires an SSLHandler, which
> contains 3 buffers:
> - Two buffers for encrypted inbound and outbound packets, respectively.
> - One buffer for decrypted application data
> The buffer sizes are computed as follows:
> Packet buffer size = the current size of the largest SSL/TLS packet that is
> expected when using this session (SSLSession.packetBufferSize())
> Application buffer size = 2 x packet buffer size
> In Sun JSSE the SSLSession.packetBufferSize() equals to 16K, which implies a
> total of 64K SSL buffer space per connection. For 10K active this means that
> 640MB of memory is required just for SSL buffers.
> Such overhead really limits the number of concurrent connections an
> application can support.
> A possible resolution is to dynamically re-adjusting the buffer capacity, and
> allowing to configure the initial buffer sizes.
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