Debug Tracing Options

Windows httpd supports debug tracing to help isolate problems with HTTP, network I/O, and control flow. To enable tracing, include the -x option on the command line. The numeric argument to this option controls which event classes are traced, and can be in decimal or hex (preceded by "0x"). Hex is easier to deal with. The trace classes supported in the current release, and their mask values, are shown below:

  
  0x00000010    Main dispatcher control flow
  0x00000020    Transaction thread control flow
  0x00001000    HTTP
  0x00002000    Network I/O and aynchronous event handling
  0x00040000    Hex/ASCII dump of transmitted packets

For example:

  -x0x3030

will trace Main and transaction control flow, HTTP, and Net I/O.


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