Are the containers/storage-pools (for the database) are on the same file-system(s) that host path1,path2,path3 (target directories for the backup files)? Ans:
Path1,Path1,Path1 (All three same locations), Earlier we tried different location on same file system but it didnt showed any improvement.
Though its same path 3 times , its creating 3 different nodes with varying sizes
What is your UTIL_HEAP_SZ?
Utilities heap size (4KB) (UTIL_HEAP_SZ) = 73959
I am also attaching all the cfg parameters, Please check the attachment
Why specify 12 buffers without also specifying a large buffer size ( i cannot understand a buffersize of 33)?
If its not 33 what will be the recommended buffer size for 12 buffers
How does the buffersize compare to the average extent-size of the large tablespaces?
-- Will get back on this Did you time the basic backup without any of the parallellism/buffers/buffersize options to get a benchmark ?
The improvement was not marginal, it varied only few mins like 2 to 4
What is the size (in GB/TB) of the compressed backup files (sum of sizes of files in path1,path2,path3)?
Total size is 27+27+1.7GB, Its creating three files