Steps to increase the Margin time/DIAGWAIT

These are following steps to increase the Margin time.

The Modification process need Downtime and You need to stop cluster service in all member nodes.

1. Stop The CRS Process#crsctl stop crs #

2. Ensure that Clusterware stack is down and not running
#ps -ef egrep "crsd.binocssd.binevmd.binoprocd"
This should return no processes.

3. From one node of the cluster, change the value of the "diagwait" parameter to 13 by issuing the command as root: #crsctl set css diagwait 13 -force

4. Check if diagwait is successfully set.#crsctl get css diagwait

5. Restart the Oracle Clusterware on all the nodes by executing: #crsctl start crs
(Note- If facing any problem to restarting the CRS services, ASM and Database, You can reboot the Nodes.The Cluster and Database will come automatically due to init startup scripts.)

6. The oprocd daemon process will show with -m 10000# ps -efl grep oprocd# 4 S root 6440 6063 0 -40 - - 2114 - Feb02 ? 00:00:00 /opt/oracle/product/10.2.0/crs/bin/oprocd.bin run -t 1000 -m 10000 -hsi 5:10:50:75:90 -f

The value of m = 10000 shows that the changes have been affected

Rollback Procedure-If You need to unset oprocd value due any reason
#crsctl unset css diagwait

Useful Metalink Notes for Clusterware
========================================
239989.1 10g RAC: Stopping Reboot Loops When CRS Problems Occur
259301.1 CRS and 10g RAC
This note contains a useful awk script to improve the output of crs_stat -ls
436067.1 Windows CRS_STAT script to display long names correctly
309541.1 How to start/stop the 10g CRS Clusterware
263897.1 How to stop Cluster Ready Services (CRS)
298073.1 How to remove CRS auto start and restart for a RAC instance
295871.1 How to verify if CRS install is valid
316583.1 VIPCA fails complaining that interface is not public
341214.1 How to cleanup after a failed (or successful) Oracle Clusterware installation
280589.1 How to install Oracle 10g CRS on a cluster where one or more nodes are not to be configured with CRS immediately
357808.1 CRS Diagnostics
272331.1 CRS 10g Diagnostic Guide
330358.1 CRS 10g R2 Diagnostic Collection Guide
331168.1 Oracle Clusterware consolidated logging in 10gR2
342590.1 CRS logs not being written
357808.1 Diagnosability for CRS/EVM/RACG
459694.1 Procwatcher: Script to Monitor and Examine Oracle and CRS Processes
289690.1 Data Gathering for Troubleshooting RAC and CRS issues
265769.1 Troubleshooting CRS Reboots
240001.1 Troubleshooting CRS root.sh problems (10g RAC)
239989.1 10g RAC - Stopping Reboot Loops when CRS problems occur
294430.1 CSS Timeout Computation in 10g RAC
284752.1 10gRAC: Steps to Increase CSS Misscount, Reboottime and Disktimeout
462616.1 Reconfiguring the CSS disktimeout of 10gR2 Clusterware for proper LUN failover
293819.1 Placement of voting and OCR disk file in 10g RAC
317628.1 How to replace a corrupt OCR mirror file
452486.1 Moving OCR and Voting Disk to another location
399482.1 How to recreate OCR/Voting disk accidentally deleted
358620.1 How to recreate OCR/Voting disk in 10gR1/R2 RAC
279793.1 How to Restore a Lost Voting Disk in 10g
264847.1 How to Configure Virtual IPs for 10g RAC
283684.1 How to change interconnect/public interface IP subnet in a 10g cluster
276434.1 Modifying the VIP or VIP Hostname of an Oracle 10g Clusterware Node
294336.1 Changing the check interval for the Oracle 10g VIP
219361.1 Troubleshooting Instance Evictions (ORA-29740)
297498.1 Resolving Instance Evictions on Windows platforms
315125.1 What to check if the Cluster Synchronization Services daemon (OCSSD) does not start
270512.1 Adding a node to a 10g RAC Cluster
269320.1 Removing a node from a 10g RAC Cluster
338706.1 Cluster Ready Services (CRS) rolling upgrade
399031.1 Step-by-step installation of Oracle Clusterware one-off and bundle patches for Oracle 10g
401783.1 Changes in Oracle Clusterware after applying 10.2.0.3 Patchset
405820.1 Known Issues After Applying 10.2 CRS bundle patches
316817.1 Cluster Verification Utility (CLUVFY) FAQ
372358.1 Shared disk check with the Cluster Verification Utility
338924.1 CLUVFY Fails with error - could not find a suitable set of interfaces for VIPs