The DataServer log contains messages indicating the status of connections. At startup, the number of managed connections initialized is written to the log file. If connections are rejected, this is also logged. If a connection from the ODBC connection pool cannot be reused, the ODBC driver issues the message DEAD Connection which is written to the log file.

At the end of a session, the DataServer writes summary information about cursor use. The summary contains the following information:

  • Needed connections — The number of connections actually used during a session
  • Peak connections — The maximum number of connections used simultaneously during a session

When debug logging is enabled with the "-Dsrv qt_debug,cursor" switch, a summary of connection activity is written to the log file. This summary contains:

  • Number of connections (defaults to 5)
  • Number of peak connections (defaults to 5)
  • Highest connection value
  • Lowest connection value
  • Number of connections pulled out of pool
  • Number of connections placed in the pool
  • Total sum of active connections

The following excerpt from a dataserv.lg file shows the summary of the managed connection activity written when the "-Dsrv qt_debug,cursor" switch is used, plus the standard messages:

16:32:09 : Standard secondary connection:
16:32:09 : Connection chain 0xbc6e64: num_conns 1
16:32:09 : Connection chain 0xbc6e64: peak_conns 1
16:32:09 : Connection chain 0xbc6e64: high_conns 1
16:32:09 : Connection chain 0xbc6e64: low_conns 0
16:32:09 : Connection chain 0xbc6e64: num_off_conns 1
16:32:09 : Connection chain 0xbc6e64: num_on_conns 1
16:32:09 : Connection chain 0xbc6e64: sum_active 1
16:32:09 : Connection chain 0xbc6e64: Needed Connections: 1, (Needed 4 less than requested)
16:32:09 : Connection chain 0xbc6e64: Peak Connections: 1, (Peaked at 4 less than requested)
16:32:09 : Connect: 0x1012398    Stmt: 0x1b95f80   Handle: 0x1011d98   Crc: 1613 Proprty:      Statement dropped
16:32:09 : Statement cache (-Dsrv PRGRS_PREPCACHE setting) reuse ratio is 0.

For more information on using the qt_debug option to the -Dsrv switch, see Server Related Command Line Utilities and Startup Parameters