rdisp/max_debug_attach_wait_time is a SAP Parameter attribute which is used to control Maximum hold time for work processes in DEBUG-Attach mode information. This is available within R/3 SAP systems depending on the version and release level.
Below is the standard documentation available and a few details of the attributes values .
The DEBUG-Attach mode describes a special situation, which can only
occur during debugging using ABAP in Eclipse or similar "external"
debugger tools. This mode does not occur during debugging using the
SAPGui.
Using ABAP in Eclipse the DEBUG-Attach mode occurs, when a request
reaches a breakpoint. The request then triggers a message to the
external debugger tool (e.g. Eclipse) and subsequently waits for being
attached by a debugger (e.g. Eclipse debugger). If the request is in a
so-called "exclusive debugging mode" or "SAP debugging mode" (refer to
profile parameter "rdisp/wpdbug_max_no"), then the work process is
blocked while the request is waiting.
The parameter controls the maximum time the request is waiting in the
"exclusive debugging mode" for being attached, before it continues with
normal processing.
See SAP Parameter Documentation for full SAP documentation for this profile parameter.