Answer: When starting a SQL Anywhere Version 9 or later target database, turn on the capturing of timing information for each connection:

• Specify the -zt server command line option (SQL Anywhere 9 or later), or

• call sa_server_option() to turn on 'RequestTiming' (SQL Anywhere 10 or later):

  CALL sa_server_option ( 'RequestTiming', 'YES' );

See also...
How do I get something to show up in the Last Statement column?