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High Wait Event "Sql*Net Vector Data From Client" In The Output Of The Statspack Report (Doc ID 1311281.1)

Last updated on MARCH 03, 2020

Applies to:

Oracle Database - Enterprise Edition - Version 11.1.0.7 and later
Information in this document applies to any platform.

Symptoms

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Disclaimer:

NOTE: In the images and/or the document content below, the user information and environment data used represents fictitious data from the Oracle sample schema(s), Public Documentation delivered with an Oracle database product or other training material. Any similarity to actual environments, actual persons, living or dead, is purely coincidental and not intended in any manner.

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Getting a lot of wait events SQL*Net vector data from client on a standby-db when running statspack report.

For Example:




STATSPACK Statistics Report for Physical Standby

Database DB Id Instance Inst Num Startup Time Release RAC
~~~~~~~~ ----------- ------------ -------- --------------- ----------- ---
1896002354 <instance> 1 16-Mar-11 04:14 11.1.0.7.0 NO

Host Name: <hostname> Num CPUs: 17 Phys Memory (MB): 52,303
~~~~

Snapshot Snap Id Snap Time Sessions Curs/Sess Comment
~~~~~~~~ ---------- ------------------ -------- --------- -------------------
Begin Snap: 946 31-Mar-11 16:30:01 291 1.3
End Snap: 947 31-Mar-11 17:30:01 243 1.7
Elapsed: 60.00 (mins)


Avg %Time Total Wait wait
Event Waits -outs Time (s) (ms)
---------------------------------------- ------------ ------ ---------- ------

Top 5 Timed Events Avg %Total
~~~~~~~~~~~~~~~~~~
wait Call
Event Waits Time (s) (ms) Time
----------------------------------------- ------------ ----------- ------ ------
CPU time 11,767 48.4
SQL*Net vector data from client 1,485,667 4,923 3 20.2
parallel recovery control message reply 100,586 1,939 19 8.0
RFS write 652,007 1,507 2 6.2
db file sequential read 398,323 1,046 3 4.3

Changes

NA

Cause

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In this Document
Symptoms
Changes
Cause
Solution


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