onstat -g iob

Home | Previous Page | Next Page Utility Reference > onstat: Monitor Database Server Operations > The onstat -g Monitoring Options >

onstat -g iob

Prints big buffer use by I/O virtual-processor class.

Example Output

Figure 38. onstat -g iob output

IBM Informix Extended Parallel Server Version 8.50.FN145 -- On-Line -- Up 01:55:24 
-- 101376 Kbytes
AIO big buffer usage summary:
class                 reads                                   writes
       pages    ops  pgs/op  holes  hl-ops hls/op      pages    ops  pgs/op
fifo      0       0   0.00      0       0   0.00           0      0   0.00
 kio      0       0   0.00      0       0   0.00           0      0   0.00
 adt      0       0   0.00      0       0   0.00           0      0   0.00
 msc      0       0   0.00      0       0   0.00           0      0   0.00
 aio      0       0   0.00      0       0   0.00         611    611   1.00
 pio      0       0   0.00      0       0   0.00           0      0   0.00
 lio      0       0   0.00      0       0   0.00           0      0   0.00

Output Description

Class
pages: Total number of pages read by this class of I/O vp
ops: Number of read operations that have occurred (I/O).

Reads
pgs/op: Average number of pages read per I/O
holes: Number of non-contiguous blocks read in during an I/O operation
hl-ops: Number of operations where a hole was found
hls/op: Average number of holes per operation where a hole was found

Writes
ops: Number of operations that have occurred
pgs/op: Average number of pages per I/O writer operation