The Priority property can be used to control the processor
usage, memory and network bandwidth allocated by the server for
client sessions. One of the following values may be specified:
| Value |
Constant |
Description |
| 0 |
ftpPriorityBackground |
This priority significantly reduces the memory, processor
and network resource utilization for the server. It is
typically used with lightweight services running in the
background that are designed for few client connections. Each
client thread will be assigned a lower scheduling priority and
will be frequently forced to yield execution to other
threads. |
| 1 |
ftpPriorityLow |
This priority lowers the overall resource utilization for
the client session and meters the processor utilization for the
client session. Each client thread will be assigned a lower
scheduling priority and will occasionally be forced to yield
execution to other threads. |
| 2 |
ftpPriorityNormal |
The default priority which balances resource and processor
utilization. It is recommended that most applications use this
priority. |
| 3 |
ftpPriorityHigh |
This priority increases the overall resource utilization
for each client session and their threads will be given higher
scheduling priority. It is not recommended that this priority
be used on a system with a single processor. |
| 4 |
ftpPriorityCritical |
This priority can significantly increase processor, memory
and network utilization. Each client thread will be given
higher scheduling priority and will be more responsive to
network events. It is not recommended that this priority be
used on a system with a single processor. |
The ftpPriorityNormal priority balances resource and network
bandwidth utilization while ensuring that a single-threaded server
application remains responsive to the user. Lower priorities reduce
the overall resource utilization of the server at the expense of
throughput.
Higher priority values increase the thread priority and processor
utilization for each client session. You should only change the server
priority if you understand the impact it will have on the system and
have thoroughly tested your application. Configuring the server to run
with a higher priority can have a negative effect on the performance
of other programs running on the system.