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List:       mysql
Subject:    bytes in Recv-Q not processed by mysql
From:       Jatin Davey <jashokda () cisco ! com>
Date:       2016-01-27 2:24:38
Message-ID: 56A82796.1080302 () cisco ! com
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Hi All

In my application while writing to DB , i could see the following output 
from netstat for a single connection to the mysqld DB.

*******************
tcp       18      0 ::ffff:127.0.0.1:3306 ::ffff:127.0.0.1:43029      
ESTABLISHED 30850/mysqld keepalive (3517.74/0/0)

*******************

I could see that there are 18 outstanding bytes that are not read by 
mysql in this connection. This stays on indefinitely in my system and is 
cleared only until i restart my application. I could see some functional 
issues as well in my application and when i hit the functional issue i 
can see the above observation from the netstat -tonp command.

Basically certain threads get into BLOCKED state unable to write to DB. 
Any help / pointers would be really appreciated.

Thanks
Jatin


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