Spec-Zone .ru
спецификации, руководства, описания, API
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Spec-Zone .ru
спецификации, руководства, описания, API
|
The cluster_operations table provides a per-operation (stateful primary key op)
view of all activity in the MySQL Cluster from the point of view of the local data management (LQH) blocks (see
).
The following table provides information about the columns in the cluster_operations table. For each column, the table shows the name, data type, and a
brief description. Additional information can be found in the notes following the table.
| Column Name | Type | Remarks |
|---|---|---|
node_id |
integer | Node ID of reporting LQH block |
block_instance |
integer | LQH block instance |
transid |
integer | Transaction ID |
operation_type |
string | Operation type (see text for possible values) |
state |
string | Operation state (see text for possible values) |
tableid |
integer | Table ID |
fragmentid |
integer | Fragment ID |
client_node_id |
integer | Client node ID |
client_block_ref |
integer | Client block reference |
tc_node_id |
integer | Transaction coordinator node ID |
tc_block_no |
integer | Transaction coordinator block number |
tc_block_instance |
integer | Transaction coordinator block instance |
The transaction ID is a unique 64-bit number which can be obtained using the NDB API's method. (Currently, the MySQL Server does not expose the NDB API transaction ID of an ongoing transaction.)
The operation_type column can take any one of the values READ, READ-SH, READ-EX,
INSERT, UPDATE, DELETE,
WRITE, UNLOCK, REFRESH,
SCAN, SCAN-SH, SCAN-EX,
or <unknown>.
The state column can have any one of the values ABORT_QUEUED, ABORT_STOPPED, COMMITTED,
COMMIT_QUEUED, COMMIT_STOPPED, COPY_CLOSE_STOPPED,
COPY_FIRST_STOPPED, COPY_STOPPED, COPY_TUPKEY, IDLE, LOG_ABORT_QUEUED,
LOG_COMMIT_QUEUED, LOG_COMMIT_QUEUED_WAIT_SIGNAL,
LOG_COMMIT_WRITTEN, LOG_COMMIT_WRITTEN_WAIT_SIGNAL,
LOG_QUEUED, PREPARED, PREPARED_RECEIVED_COMMIT,
SCAN_CHECK_STOPPED, SCAN_CLOSE_STOPPED, SCAN_FIRST_STOPPED, SCAN_RELEASE_STOPPED, SCAN_STATE_USED, SCAN_STOPPED, SCAN_TUPKEY, STOPPED, TC_NOT_CONNECTED,
WAIT_ACC, WAIT_ACC_ABORT, WAIT_AI_AFTER_ABORT,
WAIT_ATTR, WAIT_SCAN_AI, WAIT_TUP,
WAIT_TUPKEYINFO, WAIT_TUP_COMMIT, or WAIT_TUP_TO_ABORT. (If the MySQL Server is running with ndbinfo_show_hidden enabled, you can view this list of states by selecting
from the ndb$dblqh_tcconnect_state table, which is normally hidden.)
You can obtain the name of an NDB table from its table ID by checking the output of
ndb_show_tables.
The fragid is the same as the partition number seen in the output of ndb_desc --extra-partition-info
(short form -p).
In client_node_id and client_block_ref, client refers to a MySQL Cluster API or SQL node (that is, an NDB API client or a
MySQL Server attached to the cluster).