question Re: How can I check the Impala Query Execution Time? in Support Questions

How can I check the Impala Query Execution Time?

Mogiking — Fri, 16 Sep 2022 14:26:51 GMT

Hello all,

My system administrator wants to check the Impala Query's execution time.

I can check the each fragment's total time in

[Cloudera Manager > Impala > Query > Query details].

But I can't find the total of query execution time.

Please anyone tell me where can I check it.

Thanks

Re: How can I check the Impala Query Execution Time?

Andrew_Sherman — Tue, 18 Jun 2019 00:33:27 GMT

On that Cloudera Manager page, you can click 'Select Attributes' and check the box by 'Duration'.
Now any queries that are displayed will show the query duration in milliseconds.

Re: How can I check the Impala Query Execution Time?

Mogiking — Tue, 18 Jun 2019 05:31:11 GMT

Thanks for reply Andrew,

I found that duration keep increasing while Hue session is opened.

So I guess that 'Duration' is not a exact execution time..

Is it bug?

Re: How can I check the Impala Query Execution Time?

EricL — Wed, 19 Jun 2019 23:13:35 GMT

Hi @Mogiking

Hue keeps the query handler open so that it can get back to its result during pagination. This is a feature in Hue, not a bug.

You can find that info from impala PROFILE under Query Timeline section, like below:

Query Timeline
Query submitted: 0ns (0)
Planning finished: 170ms (170000854)
Submit for admission: 172ms (172000864)
Completed admission: 172ms (172000864)
Ready to start on 2 backends: 172ms (172000864)
All 2 execution backends (3 fragment instances) started: 176ms (176000884)
Rows available: 422ms (422002119)
First row fetched: 501ms (501002515)
Unregister query: 509ms (509002555)

You can see detailed information on when data is available.

Cheers
Eric

Re: How can I check the Impala Query Execution Time?

Andrew_Sherman — Wed, 19 Jun 2019 23:42:02 GMT

Hi Mogiking,

On the version I was testing (CDH 6.2) the duration looks correct, but the queries do not show up until they are completely closed. I was able to force this from the Impala Daemon Web UI, or by waiting, or by closing hue.

-Andrew