Hi,
I have created a dashboard that fetches data from Apache Impala. However, I've noticed that the queries run quickly in Impala, but the dashboards are taking a long time to open.
Why might this be happening
@User_1X7K6 - Please make sure the version of Impala you are using is certified with OAS.
Reference: https://docs.oracle.com/en/middleware/bi/analytics-server/administer-oas/certification-supported-data-sources.html
Validate by simply pulling a single column and checking the query execution stats in session log to validate where the max time is spent to identify the bottle neck for starter.
Impala version is 3.2.
Where can I see the query execution stats in session log ?
@User_1X7K6 - It can be seen at the end of the session log. Please be informed query stats are recorded only if the query execution is successful.
I am not aware where session log is
@User_1X7K6 - Login as an Admin user. Go to Administration —> Manage Sessions. It will have all the logs listed for the analysis and dashboards run in recent times. Select the one you want to review and click on view log.
I can not find it.
Click on Session and Query Cache. Earlier suggested navigation is valid if you are navigating from Classic Analytics Home.
Click on View Log hyperlink under Action column and you can see the details. Also, when certification matrix says 2.7+ it means 3.2 version is uncertified.
Version Numbers logic explained:
"1.6+" means any version starting with 1 and is greater than or equal to (>=) 1.6 (for example, this includes version 1.8 but not version 2.4).
With same logic 3.2 is not a certified version.
Oh, ok. I pressed the view logs but the info is very poor. No duration or steps.
@User_1X7K6 - You can increase the logging level, please find the details for the same in below document: https://docs.oracle.com/en/middleware/bi/analytics-server/administer-oas/configure-query-logging.html#GUID-F64A3248-A907-44DF-97E9-AD4C86C50F0C
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