system.fs.file_handles Metrics from DataDog Agent

Name

• system.fs.file_handles.in_use

• The amount of used allocated file handles over the system max.
• fraction (unit)

• system.fs.file_handles.max

• The max amount of file handles over the system max.
• handles (unit)

• system.fs.file_handles.used

• The amount of used file handles over the system.
• handles

• system.fs.file_handles.allocated

• The amount of allocated file handles over the system.

• system.fs.file_handles.allocated_unused

• The amount of unused file handles over the system.

计算公式

# handle_metrics = [23104, 0, 3040400]
# https://www.kernel.org/doc/Documentation/sysctl/fs.txt
# allocated_fh = float(handle_metrics[0])
# allocated_unused_fh = float(handle_metrics[1])
# max_fh = float(handle_metrics[2])
# num_used = allocated_fh - allocated_unused_fh
system.fs.file_handles.allocated = allocated_fh
system.fs.file_handles.allocated_unused = allocated_unused_fh
system.fs.file_handles.in_use = num_used / max_fh
system.fs.file_handles.used = num_used
system.fs.file_handles.max = max_fh

数据来源

# cat /proc/sys/fs/file-nr

23104   0   3040400