1. Bertrand Drouvot

2. Oracle DBA since 1999 OCP 9i,10g,11g Rac certified Expert Exadata certified implementation specialist Blogger since 2012 @bertranddrouvot BasketBall fan 3. exadata_metrics.pl: a tool to extract real time metrics based on cumulative ones. You can download it from my blog: bdrouvot.wordpress.com or google it. 4. cellcli -e "list metriccurrent attributes metricType" | sort | uniq Cumulative: Cumulative statistics since the metric was created. Instantaneous: Value at the time that the metric is collected. Rate: Rates computed by averaging statistics over observation periods. 5. cellcli -e "list metriccurrent attributes name where metrictype='Cumulative'" | wc l And especially on cellcli -e "list metriccurrent attributes name where name like 'DB_IO_.*' and metrictype='Cumulative' and metricobjectname=BDT'" DB_IO_RQ_LG (RQ = requests) DB_IO_RQ_SM DB_IO_WT_LG (WT=Wait Time) DB_IO_WT_SM 6. Understand the output of the script. Show the options/features of the script. 7. alter iormplan objective=auto;./exadata_metrics_v1.pl cell=exacell1 name='DB_IO_.*' objectname=BDT' 8. How to interpret delta=0 ? list METRICCURRENT DB_IO_RQ_SM detail The same with the rate: list METRICCURRENT DB_IO_RQ_SM_SEC detailSo that's not clear with this version (unless interval time is > collection time) 9. ./exadata_metrics_v2.pl cell=exacell1 name='DB_IO_.*' objectname=BDT'Great the DELTA(s) does the job so:DELTA(s) > 0: Means you can check the metric value as the snaps are from 2 distinct collectionTime. DELTA(s) = 0: Means the snaps come from the same collectionTime and then a metric value of 0 is obvious. 10. ./exadata_metrics_v2.pl cell=exacell1 name='DB_IO.*' objectname=BDT' And then compare withcellcli -e "list metriccurrent attributes name,metrictype,metricobjectname,metricvalue, collectionTime where name like 'DB_IO_.*' and metricobjectname=BDT' and metrictype='Rate'" 11. Lets see the help Can display snap or avg since script has been launched or both Can aggregate Can filter or exclude Can work with a group of cell 12. Real-time metrics from cumulative ones. I am doing it also for ASM metrics (Download asm_metrics.pl from my blog or google it)