AIO
You can suppress the message if a given total system I/O rate threshold is not reached during a reporting interval.
Syntax
The parameters are defined as follows:
Parameter | Description |
|---|---|
int | is the length of the sample period in intervals The default sample period is 30 seconds (one interval). |
name | is the name of the address space to be monitored If the last character of the name is an asterisk (*), the name is to be treated as a generic address-space name prefix; that is, any address space whose name matches the character string up to but not including the asterisk is monitored. |
percent | is the percentage of total system I/O for which an address space must be responsible before an exception message is issued for that address space If this value is zero, no warning messages will be issued. |
type | is the type of address space to be monitored, where
|
rate | is the rate of EXCPs per second that must be reached before exception messages are issued The default is a system I/O rate greater than 25 EXCPs per second. |
Example
Assuming a report interval of 30 seconds, the following control statement displays warning messages at two-minute intervals if the system I/O rate exceeds 1,000 EXCPs-per-second over the preceding two minutes:
AIO 4,*,20,A,1000
Also, a warning is issued for any address space doing more than 20 percent of the I/O.
Warning messages
The following warning messages are issued by the AIO sampler:
PWSAIO90 *WARNING* TOTAL SYSTEM I/O RATE IS ppppp EXCPS/SEC
Message PWSAIO90 indicates that the system-I/O rate has exceeded the warning threshold.
PWSAIO92 *WARNING* I/O RATE FOR ttt nnnnnnnn IS xxx% OF TOTAL
Message PWSAIO92 indicates that the specified address space has exceeded the warning threshold for percentage of system I/O, where
Variable | Description |
|---|---|
ttt | is STC, TSU, or JOB |
nnnnnnnn | is the address space name |
xxx | is the percent of the total system I/O rate |