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JDBC pooling Oracle driver Socket read timed out

I run Java EE application on Glassfish server v3 together with Oracle 12 DB on the same machine under Windows Server 2012 64bit. I use latest ojdbc7 driver. Connection pool config: ...
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1answer
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Does “Connect” statement for every query indicate broken connection pooling?

there's only one client application running queries against a MySQL instance. After enabling MySQL's general query log (configured to log every query) I noticed that every query starts with a ...
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Sleeping connections

I have a dedicated MySQL server(8GB) with following configuration. [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql lower_case_table_names = 1 ...
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ORA-12516 but max_utilization not reaching limit

Our app began to raise ORA-12516, TNS:listener could not find available handler with matching protocol stack errors, and I'm trying to diagnose why. The workload has not changed, so I think we might ...