content_image/738267.jpg content_image/738272.jpg content_image/738275.jpg
This option is useful only when running mysqld  on host machines having multiple CPUs, multiple cores, or both. For best results, the value should be smaller than the total number of cores available on the host machine. Setting it to a value greater than this is likely to degrade performance severely. 

<img src='content_image/738267.jpg'>

## • --ndb-cluster-connection-pool-nodeids= list 

## Important 

Because each SQL node using connection pooling occupies multiple API node slots—each slot having its own node ID in the cluster—you must not  use a node ID as part of the cluster connection string when starting any mysqld  process that employs connection pooling. 

Setting a node ID in the connection string when using the --ndb-cluster- connection-pool  option causes node ID allocation errors when the SQL node attempts to connect to the cluster. 

<img src='content_image/738272.jpg'>

Specifies a comma-separated list of node IDs for connections to the cluster used by an SQL node. The number of nodes in this list must be the same as the value set for the --ndb-cluster-connection- pool  option. 

## • --ndb-blob-read-batch-bytes= bytes 

<img src='content_image/738275.jpg'>

