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Know more about "os thread startup" 'os thread startup' takes significant amount of time in 'create index parallel'. All slaves are allocated one by one in serial. SQL tracing on foreground, th...

The ASM attributes directory - the ASM metadata file number 9 - contains the information about disk group attributes. The attributes directory exists only in disk groups with the COMPATIBLE.ASM (attri...

ASM metadata file number 10 is ASM user directory and ASM file number 11 is ASM group directory. These are supporting structures for ASM file access control feature. ASM file access control can be use...

ASM metadata file number 7 - volume directory - keeps track of files associated with ASM Dynamic Volume Manager (ADVM) volumes. An ADVM volume device is constructed from an ASM dynamic volume. One or ...

The disk Used Space Directory (USD) – ASM file number 8 - maintains the number of allocation units (AU) used per zone, per disk in a disk group. The USD is split into a set of Used Space Entries (USE)...

The Template Directory - ASM file number 5 - contains information about all file templates for the disk group. There are two types of templates - system and user created. The default (system) template...

The alias directory - ASM file number 6 - provides a hierarchical naming system for all the files in a disk group. A system file name is created for every file and it is based on the file type, databa...

When the ASM instance needs to make an atomic change to multiple metadata blocks, a log record is written into the ASM active change directory (ACD), which is the ASM metadata file number 3. These log...

Some long-running ASM operations, like the rebalance, drop disk, create/delete/resize file, cannot be described by a single record in the ASM active change directory. Those operations are tracked via ...

The ASM file number 1 - the ASM File Directory - keeps track of all files in a disk group. As the disk groups are independent storage units, each disk group will have its own ASM file directory. &nbsp...