How to monitor ASM and RAC

Hi, bodies:
Our initial goal is to integrate the monitoring into the EMS system which at this point would require the monitoring of a specific service. What service is running with ASM? What services would we monitor for RAC?
thanks a lot.

Do not understand your question. What do you imply by "a specific service"?
There are numerous "layers" to a RAC. The voting disk for the CRS daemons. If this is OCFS, then there is the ocfs kernel module underneath this and the mount that needs to be performed. Then there is the ASM instance. The RAC instance. Per node.
Each RAC instance have register different services that are "published" via the the listener. Oh yeah - a listener service on each node.
There is also the Interconnect that can be monitored. Never mind the o/s of each node ito resource utilisation (memory, CPU and network).
Nor should we forget that ASM itself runs on top of some shared storage mechanism (e.g. SAN drivers) which also can be monitored.
So to determine WHAT you want to monitor, you first need to know WHY you want to monitor.
What is the purpose? The business goal or requirement that you're trying to achieve?
And no - performance management is not drawing a bunch of pretty graphs with dips and spikes and not having the faintest clue what that is saying.

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•Session Count
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bLaK wrote:
Thanks for the reply HTH!
I am new to this and learning ASM. What i wanted to know is how and what setting are done in Machine-2 that it refers to ASM instance on Machine-1.
Where can I see that?
Regards!What is your database & ASM version?
Are you using Grid?
My first post explanation is specific to any ASM & RDBMS instance on server.
Describe more how these two servers configured.
you can check by
$crsctl check cssd
Or let's say how can we tell CSS service where is ASM instance located..It will be handled by CSSD process.
read this manual http://www.oracle.com/technetwork/database/asm-10gr2-bestpractices.pdf
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in-sync. Any new diskgroups that are created are also dynamically registered and broadcasted to other
nodes in the cluster.
As with the database, internode communication is used to synchronize activities in ASM instances. CSS is
used to heartbeat the health of the ASM instances. ASM internode messages are initiated by structural
changes that require synchronization; e.g. adding a disk. Thus, ASM uses the same integrated lock
management infrastructure that is used by the database for efficient synchronization.

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Edited by: user589812 on Jul 3, 2009 3:03 PM

ASM is reliable but a smart DBA is very careful. If ASM is doing mirroring this is like RAID doing mirroring. What happens if you accidentally delete one copy ... the other one disappears instantly. Not a good idea.
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regards,
sri

Sri,
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We do have SCOM, SCSM, SCO.
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Specifically you could use this Status Message Query syntax to monitor your Task Sequences for errors:
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In 26.0, how do I put Download, Bookmarks, History, and Tags into separate windows? I have multi-monitor system and place these different windows . . .

Hello,
I recently, decided to upgrade from 19.0b to the current (26.0) version, as "Tab Utilities" now supports 26, but am finding one of the visual changes counter productive. My two workstations have multiple monitors. One has 2 monitors (2560x1600) and the other one has 4 monitors (2560x1600). On both workstations, I'll place the various Firefox informational windows off the "main monitor" (the one directly in front of me). This way they're available to me at a glance.
(Side note: I refer to my monitors, as 2L, 1 2R and the 4th as "auxiliary.") The one thing I miss most is being able size these Firefox windows independently and in different positions.
I mean I'm used to seeing "Download" on monitor 2R on the right side (1/8 of screen) behind Microsoft Process Explorer's System Information. While the History will be on monitor 2L on the right side at 1/4 of the screen). I'm used to glancing out my right eye at the downloads and when needing something from the past, it's right next to the main monitor #1. This way I can access history quickly.
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(I'm not jumping up and down to go back to 19.0b or to try 25, but would like to stay current.)

Hello,
Thank you for your very quick reply. Before I read your reply completely, let me see if I can answer your first concern.
> Maybe I am missing your point.
Maybe I'm not making the point properly. Honestly, I never explained the issue from how it is directly affecting me.
OK, let's do a real world example of what I'm seeing on my two monitor system. I'll first describe what I experienced with 19.0b and earlier, which is IMHO how it should work in 26 and beyond ('''''as an option'''''). Next, I'll review what I'm seeing in 26.0. Hopefully this will help you understand what changed, from a practical perspective.
In 19.0b (and how I like working) for a multiple monitor system:
On the main monitor, I'm running Firefox. It is 1920 x 1080 and is in the lower right hand corner.
On the the monitor to my right (2R), I have the Download Manager list of downloading and downloaded file. It is in the upper right hand corner and takes up about 300 x 1500 pixels.
For a two monitor system, I have the History List running beside Firefox in the lower right hand corner and it is 600 x 1080.
For a three (plus) monitor system, I have the History List running on my left (2L) monitor. It is in the lower right hand corner and is 600 x 1080 pixels big.
For 26.0: I'm seeing the following:
On the main monitor, I'm running Firefox. It is 1920 x 1080 and is in the lower right hand corner. (This is the SAME as with 19.0b.)
When I start the Download Manager and have it set up as I do for 19.0b, it looks OK. It is on monitor 2R and is 450 x 1500 pixels (because of the new navigation side bar).
'''''The problem STARTS NOW (when I start the History List).'''''
When starting the History List, it replaces the Download Manger on the 2R monitor in the 450 x 1500 pixel window. This doesn't work for me because:
1) It is too far away to see. (NOTE: I put it on the 2L monitor in the lower right hand corner. so I can see it easier for the 3+ monitor. In the case of the 2 monitor, I put it beside Firefox again to see it easier.)
Some might ask, but the Download Manager is on the 2R and right side, why can't the History List be there too? Good question, and I can only reply saying:
1) Personal choice.
2) The Download Manager is NOT as busy as the History List and I find it easy to read.
3) The History List is a lot busier and the font size looks to be smaller (might be the same, but it looks smaller to my eyes). I need it closer to me / Firefox.
What I'm saying is this . . . The Download Manager and History List have <ul>''valid reasons to be visible to the user at the same time''.</ul> They also need to be independent of one another for (at least) size and location.
Combining them together is OK for some people, but NOT for everyone. Please make it an option to combine (as in 26) and separate (25 and earlier).
I'm not sure this is the best way to put it, but here goes. Allow users to collapse or expand these various lists by using multiple windows. One window is the collapse view and multiple independent windows is the expand view.
I'll read and comment on the rest of your reply, soon. Thanks for allowing me hopefully to explain my point in a better manner. :-)

How does 1 ASM instance in a 10 node RAC cause all 10 ASM instance to hang

Linux RHEL4
11.2.0.1.0 GI
11.2.0.1.0 RDBMS
11.1.0.7.0 RDBMS
10.2.0.4.4 RDBMS
Yesterday we had one of the ASM instance on our 10-node cluster hang with a latch "ASM file allocation latch". Oracle support has stated we are hitting a bug with is fixed in the latest PSU.
What I am trying to understand is how a latch on one ASM instance caused all 10 ASM instances to hang?
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Data Guard Site:
================
ARC1 PID 21508 reports ORA-240 'control file enqueue held for more than 120 seconds' at Thu Oct 28 11:35:54 2010. This message means ARC1 PID 21508 was holding the enqueue past the maximum tine limit of 120 seconds.
Next ARC0 PID 17398 reports ORA-16146: 'control file enqueue unavailable' at Thu Oct 28 11:36:52 2010. This means ARC0 PID 17398 tried to access the controlfile and it could get the lock.
ARC1 PID 21508 is then killed at Thu Oct 28 11:49:57 2010.
Killing enqueue blocker (pid=21508) on resource CF-00000000-00000000 by (pid=23078) by killing session 5.3
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Since this started happening around 11:14, the problem may have really started then instead of w/ the CF enqueue block.
The primary appears to be shipping redo to the standby using asynchronous mode. Unless there was a gap, I do no know if ARC1 should have been doing any remote network I/O. Because a log switch to thread 1 sequence 5235 had just happened at 11:33am, I suspect it was a local disk I/O that was started at least. The ORA-240 is reported at 11:35, exactly 120 sec (or 2min) from this log switch. Notice also the entry to show the log thread 1 sequence 5234 was registered to the controlfile didn't happen yet.
ASM Side:
============
From the systemstate dump on ASM, multiple processes are waiting on 'ASM file allocation latch' and we are kind of stuck on stack:
ksedsts()+461<-ksdxfstk()+32<-ksdxcb()+1782<-sspuser()+112<-0000003218E0C5B0<-kfuhInsert()+175<-kffilCreate()+601<-kfnsUFG()+3691<-kfnsBackground()+4382<-kfnDispatch()+527<-opiodr()+1149<-ttcpip()+1251<-opitsk()+1633<-opiino()+958<-opiodr()+1149<-opidrv()+570<-sou2o()+103<-opimai_real()+133<-ssthrdmain()+214<-main()+201<-__libc_start_main()+219
This caused the hang on the ASM side and hence ASM was not responding to the database. The CF Enqueue issue on the database was a side effect of this.
This is a direct <BUG:9232266> which is a duplicate of <BUG:8974548>

Thanks Murali,
I was little reluctent to open a tar since my experince says that its better to troubleshoot the issue yourself instead of spending time with the Oracle support :)
Well, I got some more information on this : the sql for the process id of ASM instance is :
Alter Diskgroup mount all;
It looks like it is unable to mount the diskgroup and get hunged at that point , is it due to the new disk added to the system or do we missed something after adding the new disk.
Also, the ASM process can not be killed from unix box while the ASM is down.
Will appreciate your time if we can move in any directions from here ..
Thanks ,
Ankur

How to give browse and monitor only options of an ICM script to a certain group?

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Hello Praveen,
This work at some point. But it's not resolving what I intend to do. When I give "Read Only" previledge, to the certain group, it won't be able to do other tasks what they do day to day. I am looking specifically to give read only previledge in the scripting level. Not at the configuration level.
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How to monitor ASM and RAC

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