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Direct Path Wait event [message #614512] Thu, 22 May 2014 13:28 Go to next message
guru_karnam
Messages: 142
Registered: May 2005
Senior Member
How to tune Direct Path Wait Event?

WAIT_EVENT TIME_WAITED
Idle 608679137
User I/O 18453705
Commit 3203799
System I/O 3119861
Application 111518
Concurrency 108803
Network 57015
Other 29079
Configuration 11815

USER I/0
direct path write temp 7046394
db file sequential read 4851947
direct path read 2442452
read by other session 1873309
direct path read temp 844338
db file scattered read 816091
direct path sync 616623
db file parallel read 211920
flashback log file sync 47662
Disk file operations I/O 40962
local write wait 31636


[EDITED by LF: fixed topic title typo; was "drect"]

[Updated on: Sun, 25 May 2014 09:12] by Moderator

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Re: Drect Path Wait event [message #614513 is a reply to message #614512] Thu, 22 May 2014 13:38 Go to previous messageGo to next message
BlackSwan
Messages: 22839
Registered: January 2009
Senior Member
http://www.orafaq.com/forum/mv/msg/192747/614031/#msg_614031
Re: Drect Path Wait event [message #614514 is a reply to message #614512] Thu, 22 May 2014 13:52 Go to previous messageGo to next message
John Watson
Messages: 4610
Registered: January 2010
Location: Global Village
Senior Member
Please read How to use [code] tags and make your code easier to read and re-format your post accordingly.

Also, what is the exact release you are running on? The behaviour and tuning of direct reads is different between (for example) 11.2.0.1 and 11.2.0.2.
Re: Drect Path Wait event [message #614526 is a reply to message #614512] Thu, 22 May 2014 16:13 Go to previous messageGo to next message
guru_karnam
Messages: 142
Registered: May 2005
Senior Member
11.2.0.3
Re: Drect Path Wait event [message #614533 is a reply to message #614526] Thu, 22 May 2014 17:16 Go to previous messageGo to next message
BlackSwan
Messages: 22839
Registered: January 2009
Senior Member
what problem are you trying to solve?

what specifically produce "details" in original post?
Re: Drect Path Wait event [message #614548 is a reply to message #614533] Fri, 23 May 2014 02:37 Go to previous messageGo to next message
Roachcoach
Messages: 1215
Registered: May 2010
Location: UK
Senior Member
Faster disks.
Re: Drect Path Wait event [message #614622 is a reply to message #614512] Fri, 23 May 2014 20:27 Go to previous message
Kevin Meade
Messages: 1939
Registered: December 1999
Location: Connecticut USA
Senior Member
Roachcoach is at least half right. If we think of a WAIT as waiting on something to get done (what else would it be), then there are really only two ways to deal with it. Here are these two ways in priority order.

1. change what you do so you need less of whatever you are waiting on

2. make whatever you are waiting on faster


My first question though is, DO YOU HAVE A PROBLEM? or are you just looking at some stat and thinking "hey that is the biggest one so if I make it smaller things will be better."?

Do you have a user complaining that something is taking too long or a process not meeting an SLA? If not then there is no need to "tune this wait event" because "direct path write temp 7046394"
means pretty much nothing given a lack of context.

Kevin
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