ASM disk busy 99% only on one cluster node
Hello,
We have a three node Oracle RAC cluster. Our dba(s) called us and said they are getting OEM critical alers for an asm disk on one node only. I checked and the SAN attached drive does not show the same high utilization on either of the other two nodes. I checked the hardware and it seems fine. If the issue was with the SAN attached disk, we would be seeing the same errors on all three nodes since they share the same disks. The system crashed last week(alert dump in the +asm directories), and at the disk has been busy ever since. I asked if the dba reviewed the ADDM reports and he said he had and that there were no suspicious looking entries that would lead us to the root cause based on those reports. CPU utilization is fine. I am not sure where to look at this point and any help pointing me in the right direction would be appreciated. They do use RMAN, could there be a backup running using those disks only on one node? Has anyone ever seen this before?
Thank you,
Benita Ulisano
Unix/SAN Team
Chicago Public Schools
[email protected]
Hi Harish,
Thank you for responding. To answer your question, yes, the disks are all of the same spec and are shared among the three cluster node. The asm disk sdw1 is the one with the issue.
Problem Node: coefsdb02
three nodes in RAC cluster
coefsdb01, coefsdb02, coefsdb03
iostat results for all three nodes - same disk
coefsdb01
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
sdw1 0.00 1.71 0.12 0.58 1.27 18.78 28.63 0.01 13.38 1.75 0.12
coefsdb02
sdw1 0.11 0.02 4.00 0.62 305.84 21.72 70.93 2.96 12.58 211.95 97.88
coefdb03
sdw1 0.21 0.01 4.70 0.33 224.05 13.52 47.22 0.05 10.11 6.15 3.09
The dba(s) run RMAN backups, but only on coefsdb01.
Benita
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Rebuild ASM Disk - Copying multiple datafiles from one disk to another
Hi,
I have an environment of four 11GR2 Oracle databases on a Linux server. Each database has its own ASM disk.
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Is this approach a valid solution?
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When I copy the files back to the original disk after rebuild, then rename them, will the database be able to start?
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Robrgilligan_tnf wrote:
Hi,
I have an environment of four 11GR2 Oracle databases on a Linux server. Each database has its own ASM disk.
DB1 -> ASM_DISK1
DB2 -> ASM_DISK2
DB3 -> ASM_DISK3
DB4 -> ASM_DISK4
I need to rebuild one of the ASM disks (ASM_DISK1), but first I need to copy all of the datafiles to another disk (ASM_DISK2). I tried backing up the database using RMAN, but it was taking too long (nearly two days when I cancelled it). So now I am going to copy the files using ASMCMD CP command.
And how do you propose to update the controlfile to point to the new location?
unless your datafiles are offline and/or the database is down, you will corrupt them and have an unusable database when you finish.
how were you doing this with RMAN? Depending on the size of your database(700G), it very well could take some time. I have restored databases at a rate of >300G/hr from scratch. You will need to shutdown at some point to relocate the controlfiles and system and redo logfiles.
Just curious, what is the problem with diskgroup ASM_DISK1 that you want to rebuild it?
Basically my task is as follows:
1. Shutdown database.
2. Copy all data from ASM_DISK1 to ASM_DISK2.
3. Drop ASM_DISK1.
4. Re-create ASM_DISK1.
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Database size is 700GB.
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================
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for FILENAME in `cat asm_list.txt`
do
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EOF
done
================
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alter database rename file '+ASM_DISK1/DB1/DATAFILE/filename' to '+ASM_DISK1/DB1/DATAFILE/filename.dbf'
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When I copy the files back to the original disk after rebuild, then rename them, will the database be able to start?
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Scan-vip running only on one RAC node
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Any suggestions please.
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crsctl start res ora.scan1.vip
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Performing post-checks for cluster services setup
Checking node reachability...
Check: Node reachability from node "falcen6a"
Destination Node Reachable?
falcen6a yes
falcen6b yes
Result: Node reachability check passed from node "falcen6a"
Checking user equivalence...
Check: User equivalence for user "oracle"
Node Name Comment
falcen6b passed
falcen6a passed
Result: User equivalence check passed for user "oracle"
Checking time zone consistency...
Time zone consistency check passed.
Checking Cluster manager integrity...
Checking CSS daemon...
Node Name Status
falcen6b running
falcen6a running
Oracle Cluster Synchronization Services appear to be online.
Cluster manager integrity check passed
UDev attributes check for OCR locations started...
Result: UDev attributes check passed for OCR locations
UDev attributes check for Voting Disk locations started...
Result: UDev attributes check passed for Voting Disk locations
Check default user file creation mask
Node Name Available Required Comment
falcen6b 0022 0022 passed
falcen6a 0022 0022 passed
Result: Default user file creation mask check passed
Checking cluster integrity...
Cluster is divided into 2 partitions
Partition 1 consists of the following members:
Node Name
falcen6b
Partition 2 consists of the following members:
Node Name
falcen6a
Cluster integrity check failed. Cluster is divided into 2 partition(s).
Checking OCR integrity...
Checking the absence of a non-clustered configuration...
All nodes free of non-clustered, local-only configurations
ERROR:
PRVF-4193 : Asm is not running on the following nodes. Proceeding with the remaining nodes.
Checking OCR config file "/etc/oracle/ocr.loc"...
OCR config file "/etc/oracle/ocr.loc" check successful
ERROR:
PRVF-4195 : Disk group for ocr location "+DATA" not available on the following nodes:
Checking size of the OCR location "+DATA" ...
Size check for OCR location "+DATA" successful...
OCR integrity check failed
Checking CRS integrity...
ERROR:
PRVF-5316 : Failed to retrieve version of CRS installed on node "falcen6b"
The Oracle clusterware is healthy on node "falcen6b"
The Oracle clusterware is healthy on node "falcen6a"
CRS integrity check failed
Checking node application existence...
Checking existence of VIP node application
Node Name Required Status Comment
falcen6b yes unknown failed
falcen6a yes unknown failed
Result: Check failed.
Checking existence of ONS node application
Node Name Required Status Comment
falcen6b no unknown ignored
falcen6a no online passed
Result: Check ignored.
Checking existence of GSD node application
Node Name Required Status Comment
falcen6b no unknown ignored
falcen6a no does not exist ignored
Result: Check ignored.
Checking existence of EONS node application
Node Name Required Status Comment
falcen6b no unknown ignored
falcen6a no online passed
Result: Check ignored.
Checking existence of NETWORK node application
Node Name Required Status Comment
falcen6b no unknown ignored
falcen6a no online passed
Result: Check ignored.
Checking Single Client Access Name (SCAN)...
SCAN VIP name Node Running? ListenerName Port Running?
falcen6-scan unknown false LISTENER 1521 false
WARNING:
PRVF-5056 : Scan Listener "LISTENER" not running
Checking name resolution setup for "falcen6-scan"...
SCAN Name IP Address Status Comment
falcen6-scan 192.168.100.210 passed
falcen6-scan 192.168.100.208 passed
falcen6-scan 192.168.100.209 passed
Verification of SCAN VIP and Listener setup failed
OCR detected on ASM. Running ACFS Integrity checks...
Starting check to see if ASM is running on all cluster nodes...
PRVF-5137 : Failure while checking ASM status on node "falcen6b"
Starting Disk Groups check to see if at least one Disk Group configured...
Disk Group Check passed. At least one Disk Group configured
Task ACFS Integrity check failed
Checking Oracle Cluster Voting Disk configuration...
Oracle Cluster Voting Disk configuration check passed
Checking to make sure user "oracle" is not in "root" group
Node Name Status Comment
falcen6b does not exist passed
falcen6a does not exist passed
Result: User "oracle" is not part of "root" group. Check passed
Checking if Clusterware is installed on all nodes...
Check of Clusterware install passed
Checking if CTSS Resource is running on all nodes...
Check: CTSS Resource running on all nodes
Node Name Status
falcen6b passed
falcen6a passed
Result: CTSS resource check passed
Querying CTSS for time offset on all nodes...
Result: Query of CTSS for time offset passed
Check CTSS state started...
Check: CTSS state
Node Name State
falcen6b Observer
falcen6a Observer
CTSS is in Observer state. Switching over to clock synchronization checks using NTP
Starting Clock synchronization checks using Network Time Protocol(NTP)...
NTP Configuration file check started...
The NTP configuration file "/etc/ntp.conf" is available on all nodes
NTP Configuration file check passed
Checking daemon liveness...
Check: Liveness for "ntpd"
Node Name Running?
falcen6b yes
falcen6a yes
Result: Liveness check passed for "ntpd"
Checking NTP daemon command line for slewing option "-x"
Check: NTP daemon command line
Node Name Slewing Option Set?
falcen6b yes
falcen6a yes
Result:
NTP daemon slewing option check passed
Checking NTP daemon's boot time configuration, in file "/etc/sysconfig/ntpd", for slewing option "-x"
Check: NTP daemon's boot time configuration
Node Name Slewing Option Set?
falcen6b yes
falcen6a yes
Result:
NTP daemon's boot time configuration check for slewing option passed
NTP common Time Server Check started...
NTP Time Server "133.243.236.19" is common to all nodes on which the NTP daemon is running
NTP Time Server "133.243.236.18" is common to all nodes on which the NTP daemon is running
NTP Time Server "210.173.160.86" is common to all nodes on which the NTP daemon is running
NTP Time Server ".LOCL." is common to all nodes on which the NTP daemon is running
Check of common NTP Time Server passed
Clock time offset check from NTP Time Server started...
Checking on nodes "[falcen6b, falcen6a]"...
Check: Clock time offset from NTP Time Server
Time Server: 133.243.236.19
Time Offset Limit: 1000.0 msecs
Node Name Time Offset Status
falcen6b 15.332 passed
falcen6a -1.503 passed
Time Server "133.243.236.19" has time offsets that are within permissible limits for nodes "[falcen6b, falcen6a]".
Time Server: 133.243.236.18
Time Offset Limit: 1000.0 msecs
Node Name Time Offset Status
falcen6b 15.115 passed
falcen6a -1.614 passed
Time Server "133.243.236.18" has time offsets that are within permissible limits for nodes "[falcen6b, falcen6a]".
Time Server: 210.173.160.86
Time Offset Limit: 1000.0 msecs
Node Name Time Offset Status
falcen6b 15.219 passed
falcen6a -1.527 passed
Time Server "210.173.160.86" has time offsets that are within permissible limits for nodes "[falcen6b, falcen6a]".
Time Server: .LOCL.
Time Offset Limit: 1000.0 msecs
Node Name Time Offset Status
falcen6b 0.0 passed
falcen6a 0.0 passed
Time Server ".LOCL." has time offsets that are within permissible limits for nodes "[falcen6b, falcen6a]".
Clock time offset check passed
Result: Clock synchronization check using Network Time Protocol(NTP) passed
Oracle Cluster Time Synchronization Services check passed
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[oracle@falcen6a grid]$
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case, your HttpClusterServlet configuration is incorrect, or you just have
your cluster configured in correctly (if you intend for all six servers to
be a part of one cluster).
Hope this helps.
Jane
BEA Support
"Brian Reischl" <[email protected]> wrote in message
news:[email protected]...
>
> I'm using WLS6.1 SP2 running on Solaris. I'm using the new version of the
HttpClusterServlet
> (weblogic.servlet.proxy.HttpClusterServlet) to proxy to 6 managed servers
running
> on two physical servers. It's just proxying web requests, not EJBs or
anything
> like that, and we're not using session state or SSL.
>
> The problem is that the cluster servlet only sends requests to one server
at a
> time - no round-robin is going on. It seems to just latch onto the first
server
> it can find. So if I bring down all the managed servers, the first one
that comes
> back up gets all the requests forever.
>
> The only parameters to the HttpClusterServlet are DebugConfigInfo = On and
the
> WebLogicCluster property which is set to:
>
server1:9221:9222|server1:9231:9232|server1:9241:9242|server2:9221:9222|serv
er2:9231:9232|server2:9241:9242
>
>
> I've also checked the online debug info, using
http://server1:proxyport/dummy.jsp?__WebLogicBridgeConfig.
> This shows only one server under the General Server List. However it does
change
> if I take down the server listed there.
>
>
> Any help would be greatly appreciated,
> BKR
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