| Measurement |
Description |
Measurement
Unit |
Interpretation |
| Queue_max_used |
The maximum number of transactions written to the log queue |
Number
|
|
| Log_entries_inserted |
The number of log entries inserted into the queue in the last measurement period |
Number
|
|
| Queue_overflow |
The number of wait situations that arose due to log queue overflows in the last measurement period |
Number
|
If the log queue becomes full before log pages are written to the log area, then a log queue overflow occurs. If the value of this measure keeps increasing, you might want to consider altering the log queue size by resetting the LOG_IO_QUEUE parameter.
|
| Group_commits |
The number of log pages whose writing was waited for by more than one transaction, in the last measurement period |
Number
|
|
| Log_queue_transactions |
The number of transactions waiting to write in the log queue in the last measurement period |
Number
|
|
| Max_waits_per_page |
The maximum number of transactions that simultaneously waited for the same page to be written |
Number
|
A high value of this measure could cause undue delays in transaction execution.
|
| Physical_write_rate |
The rate at which log pages were written to the log area |
Writes/Sec
|
|