IntelĀ® Trace Collector 9.1 Update 2 User and Reference Guide
AUTOFLUSH [on|off]
VT_AUTOFLUSH
on
If enabled (which it is by default), Intel Trace Collector appends blocks that are currently in main memory to one flush file per process. During trace file generation this data is taken from the flush file, so no data is lost. The number of blocks remaining in memory can be controlled with MEM-MINBLOCKS.