I/O Operations Overview 

In the I/O operations menu, you can find a display of disk activities.

Prerequisites

The user has been assigned a role in accordance with the authorization concept. You are in the user menu of the user with the authorizations that correspond to this role.

The liveCache database instance is in the ONLINE operational state.

Procedure

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       1.      In the user menu, choose liveCache Assistant(transaction LC10).

       2.      Enter the name of the database connection.
You can select the name from the list of existing names. You can restrict the search for the required name.

       3.      Choose liveCache → Monitoring.

       4.      Choose Current Status → I/O Operations → Overview.

Result

The system displays an overview of the activities on the disks on which the volumes are stored. You can use the number of read and write accesses to determine how many I/O operations take place in the liveCache database instance. You can analyze in detail the threads that cause the I/O operations on the volumes.

●     If wait queues (Queue) are displayed for accesses to a disk area, this points to a bottleneck when accessing this disk area.

●     Choose Goto → I/O Details to display which thread accessed the individual volumes and to obtain information about the I/O wait queues for the individual volumes.
You can use this display to find out whether there are bottlenecks in the I/O system. The columns Queue Length and Maximum Queue Length provide information about whether there are currently or were previously large queues of I/O requests.

●     You can refresh the display.