STRATA_STRUCTURES
This table provides an overview of Tuple Mover internal details. It summarizes how the ROS containers are classified by size. A more detailed view can be found in the STRATA virtual table.
| Column Name | Data Type | Description |
|---|---|---|
ACTIVE_STRATA_COUNT |
INTEGER |
The total number of strata that have ROS containers in them |
MERGING_STRATA_COUNT |
INTEGER |
In certain hardware configurations, a high strata could contain more ROS containers than the Tuple Mover can merge out; output from this column denotes the number of strata the Tuple Mover can merge out. |
NODE_NAME |
VARCHAR |
The node name for which information is listed |
PARTITION_KEY |
VARCHAR |
The data partition for which the information is listed |
PROJECTION_ID |
INTEGER |
A unique numeric ID assigned by the Vertica catalog, which identifies the projection. |
PROJECTION_NAME |
VARCHAR |
The projection name for which information is listed on that node |
SCHEMA_NAME |
VARCHAR |
The schema name for which information is listed |
STRATUM_CAPACITY |
INTEGER |
The maximum number of ROS containers that the strata can contained before it must merge them |
STRATA_COUNT |
INTEGER |
The total number of strata for this projection partition |
STRATUM_HEIGHT |
FLOAT |
The size ratio between the smallest and largest ROS container in a stratum. |
Example
onenode=> SELECT * FROM strata_structures;
-[ RECORD 1 ]--------+-------------------
node_name | v_onenode_node0001
schema_name | public
projection_name | trades_p
projection_id | 45035996273718838
partition_key |
strata_count | 11
merging_strata_count | 4
stratum_capacity | 32
stratum_height | 28.8
active_strata_count | 1
vmartdb=> \pset expanded
Expanded display is on.
vmartdb=> SELECT node_name, schema_name, projection_name, strata_count,
stratum_capacity, stratum_height, active_strata_count
FROM strata_structures WHERE stratum_capacity > 60;
-[ RECORD 1 ]-------+--------------------------------------------------------
node_name | v_vmartdb_node0001
schema_name | public
projection_name | shipping_dimension_DBD_22_seg_vmart_design_vmart_design
partition_key |
strata_count | 4
stratum_capacity | 62
stratum_height | 25.6511590887058
active_strata_count | 1
-[ RECORD 2 ]-------+--------------------------------------------------------
node_name | v_vmartdb_node0001
schema_name | public
projection_name | shipping_dimension_DBD_23_seg_vmart_design_vmart_design
partition_key |
strata_count | 4
stratum_capacity | 62
stratum_height | 25.6511590887058
active_strata_count | 1
-[ RECORD 3 ]-------+--------------------------------------------------------
node_name | v_vmartdb_node0002
schema_name | public
projection_name | shipping_dimension_DBD_22_seg_vmart_design_vmart_design
partition_key |
strata_count | 4
stratum_capacity | 62
stratum_height | 25.6511590887058
active_strata_count | 1
-[ RECORD 4 ]-------+--------------------------------------------------------
node_name | v_vmartdb_node0002
schema_name | public
projection_name | shipping_dimension_DBD_23_seg_vmart_design_vmart_design
partition_key |
strata_count | 4
stratum_capacity | 62
stratum_height | 25.6511590887058
active_strata_count | 1
-[ RECORD 5 ]-------+--------------------------------------------------------
node_name | v_vmartdb_node0003
schema_name | public
projection_name | shipping_dimension_DBD_22_seg_vmart_design_vmart_design
partition_key |
strata_count | 4
stratum_capacity | 62
stratum_height | 25.6511590887058
active_strata_count | 1
-[ RECORD 6 ]-------+--------------------------------------------------------
node_name | v_vmartdb_node0003
schema_name | public
projection_name | shipping_dimension_DBD_23_seg_vmart_design_vmart_design
partition_key |
strata_count | 4
stratum_capacity | 62
stratum_height | 25.6511590887058
active_strata_count | 1
-[ RECORD 7 ]-------+--------------------------------------------------------
node_name | v_vmartdb_node0004
schema_name | public
projection_name | shipping_dimension_DBD_22_seg_vmart_design_vmart_design
partition_key |
strata_count | 4
stratum_capacity | 62
stratum_height | 25.6511590887058
active_strata_count | 1
-[ RECORD 8 ]-------+--------------------------------------------------------
node_name | v_vmartdb_node0004
schema_name | public
projection_name | shipping_dimension_DBD_23_seg_vmart_design_vmart_design
partition_key |
strata_count | 4
stratum_capacity | 62
stratum_height | 25.6511590887058
active_strata_count | 1
