SET @start_global_value = @@global.ROCKSDB_WAL_TTL_SECONDS;
SELECT @start_global_value;
@start_global_value
0
"Trying to set variable @@global.ROCKSDB_WAL_TTL_SECONDS to 444. It should fail because it is readonly."
SET @@global.ROCKSDB_WAL_TTL_SECONDS   = 444;
ERROR HY000: Variable 'rocksdb_wal_ttl_seconds' is a read only variable
