Vmstator

require 'vmstator'

parser = Vmstator::Parser.new

# Parse command-line arguments to vmstat.
parser.parse("-a")

# Access the command-line arguments directly as methods.
parser.active

# Other Vmstator methods for vmstat:
parser.active
parser.average  
parser.disk_statistics  
parser.disk_summary  
parser.event_counter_statistics  
parser.forks  
parser.parse  
parser.slab_info  
parser.version

# If returns a Vmstator object, for example, for active memory "-a" ...
active_memory = parser.active

# Example, the available methods to access data about Vmstator::ActiveMemory objects.
active_memory.blocks_recv  
active_memory.buffer  
active_memory.cntxt_swtchs  
active_memory.idle_time   
active_memory.kernel      
active_memory.runnable  
active_memory.swapped_in  
active_memory.uninter  
active_memory.used   
active_memory.blocks_sent  
active_memory.cache   
active_memory.free          
active_memory.interrupts  
active_memory.non_kernel  
active_memory.stolen    
active_memory.swapped_to  
active_memory.update   
active_memory.waiting

# Types of Vmstator objects:
ActiveMemory   
Cache  
DiskStatistics  
EventCounterStatistics  
Memory  
SlabInfo  
AverageMemory  
Disk   
DiskSummary     
Parser  
Stats     
VmstatError