SET @start_global_value = @@global.ROCKSDB_ACCESS_HINT_ON_COMPACTION_START;
SELECT @start_global_value;
@start_global_value
1
"Trying to set variable @@global.ROCKSDB_ACCESS_HINT_ON_COMPACTION_START to 444. It should fail because it is readonly."
SET @@global.ROCKSDB_ACCESS_HINT_ON_COMPACTION_START   = 444;
ERROR HY000: Variable 'rocksdb_access_hint_on_compaction_start' is a read only variable