Re: Get bytes sent to client

From: Alexander Pyhalov <alp(at)rsu(dot)ru>
To: Craig Ringer <craig(at)postnewspapers(dot)com(dot)au>
Cc: dmp <danap(at)ttc-cmc(dot)net>, pgsql-jdbc(at)postgresql(dot)org
Subject: Re: Get bytes sent to client
Date: 2009-12-19 09:47:59
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Good day..
I've just made new patch - extended BufferedOutputStream and
VisibleBufferedInputStream, as you suggested. It works, and results are
comparable with tcpdump data (for received traffic). For sent traffic
they are incorrect, because I can't account all ACK, but only PGSQL
It's suprising, that received traffic is more then tcpdump shows ( 2%,
butt more). I thought it would be a bit smaller then actual data.
However, this data gives good approximation (2% for 100MB traffic is not
a lot).

Craig Ringer wrote:
> On 18/12/2009 2:34 PM, Alexander Pyhalov wrote:
>> I've made patch for Postgres JDBC driver. Now driver accounts bytes
>> sent/received from client ing PGStream.
> Can't you extend or wrap the pg_input / pg_output streams to do the
> accounting in their read(...) / write(...) method instead? The way
> you've done it is rather fragile and is very prone to bitrot as other
> parts of the driver are changed.
> --
> Craig Ringer

С уважением,
Александр Пыхалов,
системный администратор ЮГИНФО ЮФУ.

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patch.pgsql.2 text/plain 8.6 KB

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