How do I check free space on ASM?
How to check free space in ASM
- Connect to asm instance: select name, state, total_mb, free_mb from v$asm_diskgroup; NAME STATE TOTAL_MB FREE_MB. —————————— ———– ———- ———-
- Using Grid Control. Go to asm host and select asm instance. Go Administration tab and input asm administration password:
- Using ASMCMD tool.
Where is my ASM disk path?
To identify the underlying physical device that the ASM disk point to, you can use the oracleasm querydisk command. The querydisk option will list the major and minor numbers that can be used to match the physical device. The following example was run on a virtual server hosting ASM and an Oracle database.
Why is there so much free space in Oracle?
So it is possible that even though there may be a large amount of free space in the database, it is not returned to the storage layer and therefore unavailable to storage for reallocation. Here is an example that illustrates the problem: Oracle considers ASM disk group FRA to be using 99 GB of storage, with 401 GB free:
How much free space does ASM disk group FRA have?
Oracle considers ASM disk group FRA to be using 99 GB of storage, with 401 GB free: The Solution. The Pure Storage array considers zeros to be free space. So, short of issuing a TRIM command, which ASM does not do, overwriting the unused space with zeros will enable the array to return the space back to the unused pool.
When to repurpose space in an oracle flash array?
When the COMPACT phase of a rebalance operation has completed, Oracle ASM informs the Flash Array which space is no longer used and can be repurposed. ASM Disk Group rebalance can be triggered using the following command. Things to be aware of before implementing ASM Filter Driver.
How to reclaim unused space in an Oracle Database?
Reclaiming Unused Space with Oracle ASM. Oracle Automatic Storage Management (ASM) is essentially an Oracle-managed file system which manages all database data files, redo logs, control files, backup sets – essentially everything except for the Oracle software and configuration files.
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