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How do I measure performance of a single sql execution in oracle

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0

I need to measure the duration of individual sql executions in Oracle DB.

I have the following query but it has two major problems.

SELECT

   instance_name,   host_name,

sql_id, sql_fulltext, plan_hash_value,

    CASE

        WHEN executions > 0

        THEN ROUND(elapsed_time/executions,3)

        ELSE NULL

    END elap_per_exec,

    elapsed_time,

    executions,

    PHYSICAL_READ_BYTES/1024 read_kb,

    buffer_gets,

    rows_processed

FROM v$sqlarea,user_users 

CROSS JOIN (SELECT instance_name,host_name FROM v$instance) 

WHERE v$sqlarea.PARSING_USER_ID = user_users.user_id AND executions > 5

1. It gives a sense of performance but this is the total duration for all executions divided by the number of executions so spikes in duration won't be noticeable




2. The duration is total of all CPUs that spent time on the task including paralleled tasks. A query that took 1 second may have 48 cores so it appears as 48 seconds.

Is the any way to get the performance for a single execution?

oracle

share

asked 4 mins ago

Brendan CooperBrendan Cooper

1

New contributor

Brendan Cooper is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

0

I need to measure the duration of individual sql executions in Oracle DB.

I have the following query but it has two major problems.

SELECT

   instance_name,   host_name,

sql_id, sql_fulltext, plan_hash_value,

    CASE

        WHEN executions > 0

        THEN ROUND(elapsed_time/executions,3)

        ELSE NULL

    END elap_per_exec,

    elapsed_time,

    executions,

    PHYSICAL_READ_BYTES/1024 read_kb,

    buffer_gets,

    rows_processed

FROM v$sqlarea,user_users 

CROSS JOIN (SELECT instance_name,host_name FROM v$instance) 

WHERE v$sqlarea.PARSING_USER_ID = user_users.user_id AND executions > 5

1. It gives a sense of performance but this is the total duration for all executions divided by the number of executions so spikes in duration won't be noticeable




2. The duration is total of all CPUs that spent time on the task including paralleled tasks. A query that took 1 second may have 48 cores so it appears as 48 seconds.

Is the any way to get the performance for a single execution?

oracle

share

asked 4 mins ago

Brendan CooperBrendan Cooper

1

New contributor

Brendan Cooper is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

I need to measure the duration of individual sql executions in Oracle DB.

I have the following query but it has two major problems.

SELECT

   instance_name,   host_name,

sql_id, sql_fulltext, plan_hash_value,

    CASE

        WHEN executions > 0

        THEN ROUND(elapsed_time/executions,3)

        ELSE NULL

    END elap_per_exec,

    elapsed_time,

    executions,

    PHYSICAL_READ_BYTES/1024 read_kb,

    buffer_gets,

    rows_processed

FROM v$sqlarea,user_users 

CROSS JOIN (SELECT instance_name,host_name FROM v$instance) 

WHERE v$sqlarea.PARSING_USER_ID = user_users.user_id AND executions > 5

1. It gives a sense of performance but this is the total duration for all executions divided by the number of executions so spikes in duration won't be noticeable




2. The duration is total of all CPUs that spent time on the task including paralleled tasks. A query that took 1 second may have 48 cores so it appears as 48 seconds.

Is the any way to get the performance for a single execution?

oracle

share

asked 4 mins ago

Brendan CooperBrendan Cooper

1

New contributor

Brendan Cooper is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

SELECT

   instance_name,   host_name,

sql_id, sql_fulltext, plan_hash_value,

    CASE

        WHEN executions > 0

        THEN ROUND(elapsed_time/executions,3)

        ELSE NULL

    END elap_per_exec,

    elapsed_time,

    executions,

    PHYSICAL_READ_BYTES/1024 read_kb,

    buffer_gets,

    rows_processed

FROM v$sqlarea,user_users 

CROSS JOIN (SELECT instance_name,host_name FROM v$instance) 

WHERE v$sqlarea.PARSING_USER_ID = user_users.user_id AND executions > 5

share

asked 4 mins ago

Brendan CooperBrendan Cooper

1

New contributor

Brendan Cooper is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share

asked 4 mins ago

Brendan CooperBrendan Cooper

1

New contributor

Brendan Cooper is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 4 mins ago

Brendan CooperBrendan Cooper

1

New contributor

Brendan Cooper is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 4 mins ago

Brendan CooperBrendan Cooper

1