Merging Pyramix 4.3 User Manual page 334

User Manual : Troubleshooting
The Profiling Window
The profiling window contains the parameters used to fine-tune the performance of hard disk accesses
for Pyramix. These parameters are not intended for user modifications, and Merging cannot guarantee
the proper functionality of Pyramix when modifications are made in this window.
VS3 Profiling window
Cache length
This is the size of the playback buffers allocated in the host PC's RAM. Pyramix allocates one buffer per
track. When the audio playback is started, all the buffers are completely loaded by reading the data
from the hard disk before the actual playback starts. Increasing the buffer size offers the benefit of a
larger immunity against short term hard disk access stalls and other operating system slow-downs at
the cost of longer latency at initial playback start.
Threshold
During playback, the audio data is read from the playback buffers, which are thus progressively emp-
tied. When the amount of data in a buffer falls below the threshold value, new data is read from the hard
disk to refill the buffer.
Request size
This parameter determines how much data is read from the hard disk when the threshold level is
reached. One option is to completely fill (To Cache Length), the other option is to load a defined amount
of data (Bursts of).
Stall Threshold
When the amount of data falls below the stall threshold, this means that the system has serious perfor-
mance problems. Playback will be temporarily stopped, while a stall warning is issued.
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User Manual