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Full Discussion: DAX fallbacks
Operating Systems Solaris DAX fallbacks Post 303020743 by pressy on Thursday 26th of July 2018 12:06:36 PM
Old 07-26-2018
Oracle DAX fallbacks

Hi,

could you explain what DAX fallbacks mean in detail and how to avoid them? Or is it ok to have fallbacks?

Unfortunately googling does not help...



MANpage says: fallbacks == Number of commands completed by the software, which DAX could not complete



OK, but why and what does it mean for the DB?



Running RAC on M7 with InMemory:

1st node=DAX commands 35.608.411 with 18 fallbacks

2nd node=DAX commands 63.563.607 with 2.656.188 fallbacks



Is it just a bad day for the second node? Any ideas how I could dig deeper at OS or DB level?



Thanks in advance and regards

- Martin
 

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PACEMAKER(8)						  System Administration Utilities					      PACEMAKER(8)

NAME
Pacemaker - Part of the Pacemaker cluster resource manager SYNOPSIS
crmadmin command [options] DESCRIPTION
crmadmin - Development tool for performing some crmd-specific commands. Likely to be replaced by crm_node in the future OPTIONS
-?, --help This text -$, --version Version information -q, --quiet Display only the essential query information -V, --verbose Increase debug output Commands: -i, --debug_inc=value Increase the crmd's debug level on the specified host -d, --debug_dec=value Decrease the crmd's debug level on the specified host -S, --status=value Display the status of the specified node. Result is the node's internal FSM state which can be useful for debugging -D, --dc_lookup Display the uname of the node co-ordinating the cluster. This is an internal detail and is rarely useful to administrators except when deciding on which node to examine the logs. -N, --nodes Display the uname of all member nodes -E, --election (Advanced) Start an election for the cluster co-ordinator -K, --kill=value (Advanced) Shut down the crmd (not the rest of the clusterstack ) on the specified node Additional Options: -t, --timeout=value Time (in milliseconds) to wait before declaring the operation failed -B, --bash-export Create Bash export entries of the form 'export uname=uuid' Notes: The -i,-d,-K and -E commands are rarely used and may be removed in future versions. AUTHOR
Written by Andrew Beekhof REPORTING BUGS
Report bugs to pacemaker@oss.clusterlabs.org Pacemaker 1.1.7 April 2012 PACEMAKER(8)
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