Sponsored Content
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
 

We Also Found This Discussion For You

1. Filesystems, Disks and Memory

What is the difference between o_direct and DAX with ext4 filesystem?

I'm trying to understand the difference between o_direct flag of open system call and dax (direct access) with ext4 filesystem. According to my understanding both bypass page cache. But I'm still unclear about the crucial difference between these 2 techniques. If there is a huge difference... (1 Reply)
Discussion started by: BHASKAR JUPUDI
1 Replies
Blt_TreeGetNode(3)					      BLT Library Procedures						Blt_TreeGetNode(3)

__________________________________________________________________________________________________________________________________________________

NAME
Blt_TreeGetNode - Finds the node from the ID. SYNOPSIS
#include <bltTree.h> Blt_TreeNode Blt_TreeGetNode(tree, number) ARGUMENTS
Blt_Tree tree (in) Tree containing the requested node. unsigned int number (in) Serial number of the requested node. _________________________________________________________________ DESCRIPTION
This procedure returns a node in a tree object based upon a give serial number. The node is searched using the serial number. The arguments are as follows: tree The tree containing the requested node. number The serial number of the requested node. RETURNS
The node represented by the given serial number is returned. If no node with that ID exists in tree then NULL is returned. EXAMPLE
The following example gets the node from a serial number. unsigned int number; Blt_TreeNode node; Blt_TreeToken token; node = Blt_TreeGetNode(token, number); if (node == NULL) { printf("no node with ID %d exists ", number); } else { printf("node found: label is %s ", Blt_TreeNodeLabel(node)); } KEYWORDS
Tcl_TreeCreateNode, Tcl_TreeDeleteNode BLT
2.4 Blt_TreeGetNode(3)
All times are GMT -4. The time now is 06:59 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy