AWR 报告 Top 10 Foreground Events by Total Wait Time 之 log file sync

os: 7.6 hundreds
db: Oracle 19.3

10G data usage swingbench amount of pressure to do testing, and then when you view the AWR reports, analyze the Top 10 Foreground Events by Total Wait Time.

log file sync

The wait for the event forward two basic instructions:

1. commit too often
2. No disk io

Improvement corresponds to

1. commit to submit batch mode to submit
2. Replace the faster disk, such as the online redo on ssd.

Reference:
https://docs.oracle.com/en/database/oracle/oracle-database/19/refrn/descriptions-of-wait-events.html#GUID-2FDDFAA4-24D0-4B80-A157-A907AF5C68E2

https://docs.oracle.com/en/database/oracle/oracle-database/19/refrn/oracle-wait-events.html#GUID-03BFEEFB-1020-4F3F-8CF8-A23E7026684B

https://docs.oracle.com/en/database/oracle/oracle-database/19/tgdba/instance-tuning-using-performance-views.html#GUID-38040CE0-704E-433B-8E08-29EB16C109F0

https://docs.oracle.com/en/database/oracle/oracle-database/19/tgdba/instance-tuning-using-performance-views.html#GUID-BB5A0533-F6F2-413C-A56D-A8BDB870536B