Can you please confirm if the query is related to DEI Installation? If yes, are you primarily running Native jobs or Hadoop pushdown jobs?
In General, to test the disk performance being obtained, following commands could be run:
EBS Disk Performance
mkdir -p <ebs_file_path>/ebs_infa_cache_test
time dd if=/dev/zero of=<ebs_file_path>/ebs_infa_cache_test/test_cache_2000MB.dd bs=1024 count=2048000 conv=fdatasync
EFS Disk Performance
mkdir -p <efs_file_path>/efs_infa_cache_test
time dd if=/dev/zero of=<efs_file_path>/efs_infa_cache_test/test_cache_2000MB.dd bs=1024 count=2048000 conv=fdatasync
Aforementioned 'dd' command, when executed, would create 2 GB file. After completion, total time taken for creating the file, along with Disk I/O rate would be displayed in the prompt.
If the disk speed obtained is in acceptable range, then you can use the mount giving better performance for Cache/Temp.