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System Views

Warning
The system views are an experimental feature and can be changed in future releases.

Ignite provides a number of built-in SQL views that contain information about cluster nodes and node metrics. The views are available in the SYS schema. See the Understanding Schemas page for the information on how to access a non-default schema.

Important

Limitations

  1. You cannot create objects in the SYS schema.

  2. System views from the SYS schema cannot be joined with user tables.

Querying System Views

To query the system views using the SQLLine tool, connect to the SYS schema as follows:

./sqlline.sh -u jdbc:ignite:thin://127.0.0.1/SYS

If your node is running on a remote server, replace 127.0.0.1 with the IP address of the server.

Run a query:

-- get the list of nodes
select * from NODES;

-- view the CPU load as a percentage for a specific node
select CUR_CPU_LOAD * 100 from NODE_METRICS where NODE_ID = 'a1b77663-b37f-4ddf-87a6-1e2d684f3bae'

The same example using Java Thin Client:

ClientConfiguration cfg = new ClientConfiguration().setAddresses("127.0.0.1:10800");

try (IgniteClient igniteClient = Ignition.startClient(cfg)) {

    // getting the id of the first node
    UUID nodeId = (UUID) igniteClient.query(new SqlFieldsQuery("SELECT * from NODES").setSchema("IGNITE"))
    .getAll().iterator().next().get(0);

    double cpu_load = (Double) igniteClient
    .query(new SqlFieldsQuery("select CUR_CPU_LOAD * 100 from NODE_METRICS where NODE_ID = ? ")
    .setSchema("IGNITE").setArgs(nodeId.toString()))
    .getAll().iterator().next().get(0);

    System.out.println("node's cpu load = " + cpu_load);

} catch (ClientException e) {
    System.err.println(e.getMessage());
} catch (Exception e) {
    System.err.format("Unexpected failure: %s\n", e);
}

CACHES

Column Type Description

CACHE_NAME

string

Cache name

CACHE_ID

int

Cache ID

CACHE_TYPE

string

Cache type

CACHE_MODE

string

Cache mode

ATOMICITY_MODE

string

Atomicity mode

CACHE_GROUP_NAME

string

Cache group name

AFFINITY

string

toString representation of affinity function

AFFINITY_MAPPER

string

toString representation of affinity mapper

BACKUPS

int

backup count

CACHE_GROUP_ID

int

cache group id

CACHE_LOADER_FACTORY

string

toString representation of cache loader factory

CACHE_STORE_FACTORY

string

toString representation of cache store factory

CACHE_WRITER_FACTORY

string

toString representation of cache writer factory

DATA_REGION_NAME

string

Data region name

DEFAULT_LOCK_TIMEOUT

long

Lock timeout in milliseconds

EVICTION_FILTER

string

toString representation of eviction filter

EVICTION_POLICY_FACTORY

string

toString representation of eviction policy factory

EXPIRY_POLICY_FACTORY

string

toString representation of expiry policy factory

INTERCEPTOR

string

toString representation of interceptor

IS_COPY_ON_READ

boolean

Flag indicating whether a copy of the value stored in the on-heap cache

IS_EAGER_TTL

boolean

Flag indicating whether expired cache entries will be eagerly removed from cache

IS_ENCRYPTION_ENABLED

boolean

True if cache data encrypted

IS_EVENTS_DISABLED

boolean

True if events disabled for this cache

IS_INVALIDATE

boolean

True if values will be invalidated (nullified) upon commit in near cache

IS_LOAD_PREVIOUS_VALUE

boolean

True if value should be loaded from store if it is not in the cache

IS_MANAGEMENT_ENABLED

boolean

IS_NEAR_CACHE_ENABLED

boolean

True if near cache enabled

IS_ONHEAP_CACHE_ENABLED

boolean

True if on heap cache enabled

IS_READ_FROM_BACKUP

boolean

True if read operation should be performed from backup node

IS_READ_THROUGH

boolean

True if read from third party storage enabled

IS_SQL_ESCAPE_ALL

boolean

If true all the SQL table and field names will be escaped with double quotes

IS_SQL_ONHEAP_CACHE_ENABLED

boolean

If true SQL on-heap cache is enabled. When enabled, Ignite will cache SQL rows as they are accessed by query engine. Rows are invalidated and evicted from cache when relevant cache entry is either changed or evicted.

IS_STATISTICS_ENABLED

boolean

IS_STORE_KEEP_BINARY

boolean

Flag indicating that {@link CacheStore} implementation is working with binary objects instead of Java objects.

IS_WRITE_BEHIND_ENABLED

boolean

Flag indicating whether Ignite should use write-behind behaviour for the cache store

IS_WRITE_THROUGH

boolean

True if write to third party storage enabled

MAX_CONCURRENT_ASYNC_OPERATIONS

int

Maximum number of allowed concurrent asynchronous operations. If 0 returned then number of concurrent asynchronous operations is unlimited

MAX_QUERY_ITERATORS_COUNT

int

Maximum number of query iterators that can be stored. Iterators are stored to support query pagination when each page of data is sent to user’s node only on demand

NEAR_CACHE_EVICTION_POLICY_FACTORY

string

toString representation of near cache eviction policy factory

NEAR_CACHE_START_SIZE

int

Initial cache size for near cache which will be used to pre-create internal hash table after start.

NODE_FILTER

string

toString representation of node filter

PARTITION_LOSS_POLICY

string

toString representation of partition loss policy

QUERY_DETAIL_METRICS_SIZE

int

size of queries detail metrics that will be stored in memory for monitoring purposes. If 0 then history will not be collected.

QUERY_PARALLELISM

int

Hint to query execution engine on desired degree of parallelism within a single node

REBALANCE_BATCH_SIZE

int

Size (in bytes) to be loaded within a single rebalance message

REBALANCE_BATCHES_PREFETCH_COUNT

int

Number of batches generated by supply node at rebalancing start

REBALANCE_DELAY

long

Rebalance delay in milliseconds

REBALANCE_MODE

string

Rebalance mode

REBALANCE_ORDER

int

Rebalance order

REBALANCE_THROTTLE

long

Time in milliseconds to wait between rebalance messages to avoid overloading of CPU or network

REBALANCE_TIMEOUT

long

Rebalance timeout in milliseconds

SQL_INDEX_MAX_INLINE_SIZE

int

Index inline size in bytes

SQL_ONHEAP_CACHE_MAX_SIZE

int

Maximum SQL on-heap cache. Measured in number of rows. When maximum size is reached oldest cached rows will be evicted.

SQL_SCHEMA

string

Schema name

TOPOLOGY_VALIDATOR

string

toString representation of topology validator

WRITE_BEHIND_BATCH_SIZE

int

Maximum batch size for write-behind cache store operations

WRITE_BEHIND_COALESCING

boolean

Write coalescing flag for write-behind cache store operations. Store operations (get or remove) with the same key are combined or coalesced to single, resulting operation to reduce pressure to underlying cache store

WRITE_BEHIND_FLUSH_FREQUENCY

long

Frequency with which write-behind cache is flushed to the cache store in milliseconds

WRITE_BEHIND_FLUSH_SIZE

int

Maximum size of the write-behind cache. If cache size exceeds this value, all cached items are flushed to the cache store and write cache is cleared

WRITE_BEHIND_FLUSH_THREAD_COUNT

int

Number of threads that will perform cache flushing

WRITE_SYNCHRONIZATION_MODE

string

Gets write synchronization mode

CACHE_GROUPS

The CACHE_GROUPS view contains information about the cache groups.

Column Data Type Description

AFFINITY

VARCHAR

The string representation (as returned by the toString() method) of the affinity function defined for the cache group.

ATOMICITY_MODE

VARCHAR

The atomicity mode of the cache group.

BACKUPS

INT

The number of backup partitions configured for the cache group.

CACHE_COUNT

INT

The number of caches in the cache group.

CACHE_GROUP_ID

INT

The ID of the cache group.

CACHE_GROUP_NAME

VARCHAR

The name of the cache group.

CACHE_MODE

VARCHAR

The cache mode.

DATA_REGION_NAME

VARCHAR

The name of the data region.

IS_SHARED

BOOLEAN

If this group contains more than one cache.

NODE_FILTER

VARCHAR

The string representation (as returned by the toString() method) of the node filter defined for the cache group.

PARTITION_LOSS_POLICY

VARCHAR

Partition loss policy.

PARTITIONS_COUNT

INT

The number of partitions.

REBALANCE_DELAY

LONG

Rebalancing delay.

REBALANCE_MODE

VARCHAR

Rebalancing mode.

REBALANCE_ORDER

INT

Rebalancing order.

TOPOLOGY_VALIDATOR

VARCHAR

The string representation (as returned by the toString() method) of the topology validator defined for the cache group.

TASKS

This view exposes information about currently running compute tasks started by a node. For instance, let’s assume that an application started a compute task using the Ignite thick client and the task’s job was executed on one of the server nodes. In this case, the thick client will report statistics related to the task via this system view while the server node will be updating the thick client with task-related execution details.

NAME TYPE DESCRIPTION

ID

UUID

Task id

SESSION_ID

UUID

Session ID

TASK_NODE_ID

UUID

Task originating node id

TASK_NAME

string

Task name

TASK_CLASS_NAME

string

Task class name

AFFINITY_PARTITION_ID

int

Cache partition id

AFFINITY_CACHE_NAME

string

Cache name

START_TIME

long

Start time

END_TIME

long

End time

EXEC_NAME

string

Thread pool name executing task

INTERNAL

boolean

True if task is internal

USER_VERSION

string

Task user version

JOBS

This system view shows a list of compute jobs started by a node as part of a compute task. To view the status of the compute task refer to the TASKS system view.

NAME TYPE DESCRIPTION

ID

UUID

Job ID

SESSION_ID

UUID

Job’s session ID. Note, SESSION_ID is equal to TASKS.SESSION_ID for the jobs belonging to a specific task.

ORIGIN_NODE_ID

UUID

The id of the node that started the job

TASK_NAME

string

The name of the task

TASK_CLASSNAME

string

Class name of the task

AFFINITY_CACHE_IDS

string

IDs of one or more caches if the job is executed against one of the IgniteCompute.affinity.. methods. The parameter is empty, if you use IgniteCompute APIs that don’t target specific caches.

AFFINITY_PARTITION_ID

int

IDs of one or more partitions if the job is executed via one of the IgniteCompute.affinity.. methods. The parameter is empty, if you use IgniteCompute APIs that don’t target specific partitions.

CREATE_TIME

long

Job’s creation time

START_TIME

long

Job’s start time

FINISH_TIME

long

Job’s finish time

EXECUTOR_NAME

string

The name of the task’s executor

IS_FINISHING

boolean

True if the job is finishing

IS_INTERNAL

boolean

True if the job is internal

IS_STARTED

boolean

True if the job has been started

IS_TIMEDOUT

boolean

True if the job timed out before completing

STATE

string

Possible values:
ACTIVE - Job is being executed.
PASSIVE - Job is added to the execution queue. Please, see CollisionSPI for more details.
CANCELED - Job is canceled.

SERVICES

AFFINITY_KEY string Affinity key value for service

CACHE_NAME

string

Cache name

MAX_PER_NODE_COUNT

int

Maximum count of services instances per node

NAME

string

Service name

NAME

TYPE

DESCRIPTION

NODE_FILTER

string

toString representation of node filter

ORIGIN_NODE_ID

UUID

Originating node ID

SERVICE_CLASS

string

Service class name

SERVICE_ID

UUID

Service ID

STATICALLY_CONFIGURED

boolean

True is service statically configured

TOTAL_COUNT

int

Total count of service instances

TRANSACTIONS

This view exposes information about currently running transactions.

NAME TYPE DESCRIPTION

ORIGINATING_NODE_ID

UUID

STATE

string

XID

UUID

LABEL

string

START_TIME

long

ISOLATION

string

CONCURRENCY

string

KEYS_COUNT

int

CACHE_IDS

string

COLOCATED

boolean

DHT

boolean

DURATION

long

IMPLICIT

boolean

IMPLICIT_SINGLE

boolean

INTERNAL

boolean

LOCAL

boolean

LOCAL_NODE_ID

UUID

NEAR

boolean

ONE_PHASE_COMMIT

boolean

OTHER_NODE_ID

UUID

SUBJECT_ID

UUID

SYSTEM

boolean

THREAD_ID

long

TIMEOUT

long

TOP_VER

string

NODES

The NODES view contains information about the cluster nodes.

Column Data Type Description

IS_LOCAL

BOOLEAN

Whether the node is local.

ADDRESSES

VARCHAR

The addresses of the node.

CONSISTENT_ID

VARCHAR

Node’s consistent ID.

HOSTNAMES

VARCHAR

The host names of the node.

IS_CLIENT

BOOLEAN

Indicates whether the node is a client.

IS_DAEMON

BOOLEAN

Indicates whether the node is a daemon node.

NODE_ID

UUID

Node ID.

NODE_ORDER

INT

Node order within the topology.

VERSION

VARCHAR

Node version.

NODE_ATTRIBUTES

The NODE_ATTRIBUTES view contains the attributes of all nodes.

Column Data Type Description

NODE_ID

UUID

Node ID.

NAME

VARCHAR

Attribute name.

BASELINE_NODES

The BASELINE_NODES view contains information about the nodes that are part of the current baseline topology.

Column Data Type Description

CONSISTENT_ID

VARCHAR

Node consistent ID.

ONLINE

BOOLEAN

Indicates whether the node is up and running.

CLIENT_CONNECTIONS

This view exposes information about currently opened client connections: JDBC, ODBC, Thin clients.

NAME TYPE DESCRIPTION

CONNECTION_ID

long

ID of the connection

LOCAL_ADDRESS

IP

address IP address of the local node

REMOTE_ADDRESS

IP

address IP address of the remote node

TYPE

string

Type of the connection

USER

string

User name

VERSION

string

Protocol version

STRIPED_THREADPOOL_QUEUE

This view exposes information about tasks waiting for the execution in the system striped thread pool.

NAME TYPE DESCRIPTION

DESCRIPTION

string

toString representation of the task

STRIPE_INDEX

int

Index of the stripe thread

TASK_NAME

string

Class name of the task

THREAD_NAME

string

Name of the stripe thread

DATASTREAM_THREADPOOL_QUEUE

This view exposes information about tasks waiting for the execution in the data streamer stripped thread pool.

NAME TYPE DESCRIPTION

DESCRIPTION

string

toString representation of the task

STRIPE_INDEX

int

Index of the stripe thread

TASK_NAME

string

Class name of the task

THREAD_NAME

string

Name of the stripe thread

SCAN_QUERIES

This view exposes information about currently running scan queries.

NAME TYPE DESCRIPTION

CACHE_GROUP_ID

int

Cache group ID

CACHE_GROUP_NAME

string

Cache group name

CACHE_ID

int

Cache ID

CACHE_NAME

string

Cache name

CANCELED

boolean

True if canceled

DURATION

long

Query duration

FILTER

string

toString representation of filter

KEEP_BINARY

boolean

True if keepBinary enabled

LOCAL

boolean

True if query local only

ORIGIN_NODE_ID

UUID

Node id started query

PAGE_SIZE

int

Page size

PARTITION

int

Query partition ID

QUERY_ID

long

Query ID

START_TIME

long

Query start time

SUBJECT_ID

UUID

User ID started query

TASK_NAME

string

TOPOLOGY

string

Topology version

TRANSFORMER

string

toString representation of transformer

CONTINUOUS_QUERIES

This view exposes information about currently running continuous queries.

NAME TYPE DESCRIPTION

AUTO_UNSUBSCRIBE

boolean

True if query should be stopped when node disconnected or originating node left

BUFFER_SIZE

int

Event batch buffer size

CACHE_NAME

string

Cache name

DELAYED_REGISTER

boolean

True if query would be started when corresponding cache started

INTERVAL

long

Notify interval

IS_EVENTS

boolean

True if used for subscription to remote events

IS_MESSAGING

boolean

True if used for subscription to messages.

IS_QUERY

boolean

True if user started continuous query.

KEEP_BINARY

boolean

True if keepBinary enabled

LAST_SEND_TIME

long

Last time event batch sent to query originating node

LOCAL_LISTENER

string

toString representation of local listener

LOCAL_TRANSFORMED_LISTENER

string

toString representation of local transformed listener

NODE_ID

UUID

Originating node id

NOTIFY_EXISTING

boolean

True if listener should be notified about existing entries

OLD_VALUE_REQUIRED

boolean

True if old entry value should be included in event

REMOTE_FILTER

string

toString representation of remote filter

REMOTE_TRANSFORMER

string

toString representation of remote transformer

ROUTINE_ID

UUID

Query ID

TOPIC

string

Query topic name

SQL_QUERIES

This view exposes information about currently running SQL queries.

NAME TYPE DESCRIPTION

DURATION

long

Query execution duration

LOCAL

boolean

True if local only

ORIGIN_NODE_ID

UUID

Node that started query

QUERY_ID

UUID

Query ID

SCHEMA_NAME

string

Schema name

SQL

string

Query text

START_TIME

date

Query start time

SQL_QUERIES_HISTORY

NAME TYPE DESCRIPTION

SCHEMA_NAME

string

Schema name

SQL

string

Query text

LOCAL

boolean

True if local only

EXECUTIONS

long

Count of executions

FAILURES

long

Count of failures

DURATION_MIN

long

Minimal duration of execution

DURATION_MAX

long

Maximum duration of execution

LAST_START_TIME

date

Last execution date

SCHEMAS

This view exposes information about SQL schemas.

NAME TYPE DESCRIPTION

NAME

string

Name of the schema

PREDEFINED

boolean

If true schema is predefined

NODE_METRICS

The NODE_METRICS view provides various metrics about the state of nodes, resource consumption and other metrics.

Column Data Type Description

NODE_ID

UUID

Node ID.

LAST_UPDATE_TIME

TIMESTAMP

Last time the metrics were updated.

MAX_ACTIVE_JOBS

INT

Maximum number of concurrent jobs this node ever had at one time.

CUR_ACTIVE_JOBS

INT

Number of currently active jobs running on the node.

AVG_ACTIVE_JOBS

FLOAT

Average number of active jobs concurrently executing on the node.

MAX_WAITING_JOBS

INT

Maximum number of waiting jobs this node ever had at one time.

CUR_WAITING_JOBS

INT

Number of queued jobs currently waiting to be executed.

AVG_WAITING_JOBS

FLOAT

Average number of waiting jobs this node ever had at one time.

MAX_REJECTED_JOBS

INT

Maximum number of jobs rejected at once during a single collision resolution operation.

CUR_REJECTED_JOBS

INT

Number of jobs rejected as a result of the most recent collision resolution operation.

AVG_REJECTED_JOBS

FLOAT

Average number of jobs this node rejected as a result of collision resolution operations.

TOTAL_REJECTED_JOBS

INT

Total number of jobs this node has rejected as a result of collision resolution operations since the node startup.

MAX_CANCELED_JOBS

INT

Maximum number of cancelled jobs this node ever had running concurrently.

CUR_CANCELED_JOBS

INT

Number of cancelled jobs that are still running.

AVG_CANCELED_JOBS

FLOAT

Average number of cancelled jobs this node ever had running concurrently.

TOTAL_CANCELED_JOBS

INT

Number of jobs cancelled since the node startup.

MAX_JOBS_WAIT_TIME

TIME

Maximum time a job ever spent waiting in a queue before being executed.

CUR_JOBS_WAIT_TIME

TIME

Longest wait time among the jobs that are currently waiting for execution.

AVG_JOBS_WAIT_TIME

TIME

Average time jobs spend in the queue before being executed.

MAX_JOBS_EXECUTE_TIME

TIME

Maximum job execution time.

CUR_JOBS_EXECUTE_TIME

TIME

Longest time a current job has been executing for.

AVG_JOBS_EXECUTE_TIME

TIME

Average job execution time on this node.

TOTAL_JOBS_EXECUTE_TIME

TIME

Total time all finished jobs took to execute on this node since the node startup.

TOTAL_EXECUTED_JOBS

INT

Total number of jobs handled by the node since the node startup.

TOTAL_EXECUTED_TASKS

INT

Total number of tasks handled by the node.

TOTAL_BUSY_TIME

TIME

Total time this node spent executing jobs.

TOTAL_IDLE_TIME

TIME

Total time this node spent idling (not executing any jobs).

CUR_IDLE_TIME

TIME

Time this node has spent idling since executing the last job.

BUSY_TIME_PERCENTAGE

FLOAT

Percentage of job execution vs idle time.

IDLE_TIME_PERCENTAGE

FLOAT

Percentage of idle vs job execution time.

TOTAL_CPU

INT

Number of CPUs available to the Java Virtual Machine.

CUR_CPU_LOAD

DOUBLE

Percentage of CPU usage expressed as a fraction in the range [0, 1].

AVG_CPU_LOAD

DOUBLE

Average percentage of CPU usage expressed as a fraction in the range [0, 1].

CUR_GC_CPU_LOAD

DOUBLE

Average time spent in GC since the last update of the metrics. By default, metrics are updated every 2 seconds.

HEAP_MEMORY_INIT

LONG

Amount of heap memory in bytes that the JVM initially requests from the operating system for memory management. Shows -1 if the initial memory size is undefined.

HEAP_MEMORY_USED

LONG

Current heap size that is used for object allocation. The heap consists of one or more memory pools. This value is the sum of used heap memory values of all heap memory pools.

HEAP_MEMORY_COMMITED

LONG

Amount of heap memory in bytes that is committed for the JVM to use. This amount of memory is guaranteed for the JVM to use. The heap consists of one or more memory pools. This value is the sum of committed heap memory values of all heap memory pools.

HEAP_MEMORY_MAX

LONG

Maximum amount of heap memory in bytes that can be used for memory management. The column displays -1 if the maximum memory size is undefined.

HEAP_MEMORY_TOTAL

LONG

Total amount of heap memory in bytes. The column displays -1 if the total memory size is undefined.

NONHEAP_MEMORY_INIT

LONG

Amount of non-heap memory in bytes that the JVM initially requests from the operating system for memory management. The column displays -1 if the initial memory size is undefined.

NONHEAP_MEMORY_USED

LONG

Current non-heap memory size that is used by Java VM. The non-heap memory consists of one or more memory pools. This value is the sum of used non-heap memory values of all non-heap memory pools.

NONHEAP_MEMORY_COMMITED

LONG

Amount of non-heap memory in bytes that is committed for the JVM to use. This amount of memory is guaranteed for the JVM to use. The non-heap memory consists of one or more memory pools. This value is the sum of committed non-heap memory values of all non-heap memory pools.

NONHEAP_MEMORY_MAX

LONG

Returns the maximum amount of non-heap memory in bytes that can be used for memory management. The column displays -1 if the maximum memory size is undefined.

NONHEAP_MEMORY_TOTAL

LONG

Total amount of non-heap memory in bytes that can be used for memory management. The column displays -1 if the total memory size is undefined.

UPTIME

TIME

Uptime of the JVM.

JVM_START_TIME

TIMESTAMP

Start time of the JVM.

NODE_START_TIME

TIMESTAMP

Start time of the node.

LAST_DATA_VERSION

LONG

In-Memory Data Grid assigns incremental versions to all cache operations. This column contains the latest data version on the node.

CUR_THREAD_COUNT

INT

Number of live threads including both daemon and non-daemon threads.

MAX_THREAD_COUNT

INT

Maximum live thread count since the JVM started or peak was reset.

TOTAL_THREAD_COUNT

LONG

Total number of threads started since the JVM started.

CUR_DAEMON_THREAD_COUNT

INT

Number of live daemon threads.

SENT_MESSAGES_COUNT

INT

Number of node communication messages sent.

SENT_BYTES_COUNT

LONG

Amount of bytes sent.

RECEIVED_MESSAGES_COUNT

INT

Number of node communication messages received.

RECEIVED_BYTES_COUNT

LONG

Amount of bytes received.

OUTBOUND_MESSAGES_QUEUE

INT

Outbound messages queue size.

TABLES

The TABLES view contains information about the SQL tables.

Column Data Type Description

AFFINITY_KEY_COLUMN

string

Affinity key column name

CACHE_ID

int

Cache id for the table

CACHE_NAME

string

Cache name for the table

IS_INDEX_REBUILD_IN_PROGRESS

boolean

True if some index rebuild for this table in progress

KEY_ALIAS

string

Key column alias

KEY_TYPE_NAME

string

Key type name

SCHEMA_NAME

string

Schema name of the table

TABLE_NAME

string

Name of the table

VALUE_ALIAS

string

Value column alias

VALUE_TYPE_NAME

string

Value type name

TABLE_COLUMNS

This view exposes information about SQL table columns.

NAME TYPE DESCRIPTION

AFFINITY_COLUMN

boolean

True if column affinity key.

AUTO_INCREMENT

boolean

True if auto incremented

COLUMN_NAME

string

Column name

DEFAULT_VALUE

string

Default column value

NULLABLE

boolean

True if nullable

PK

boolean

True if primary key

PRECISION

int

Column precision

SCALE

int

Column scale

SCHEMA_NAME

string

Schema name

TABLE_NAME

string

Table name

TYPE

string

Column type

VIEWS

This view exposes information about SQL views.

NAME TYPE DESCRIPTION

NAME

string

Name

SCHEMA

string

Schema

DESCRIPTION

string

Description

VIEW_COLUMNS

This view exposes information about SQL views columns.

NAME TYPE DESCRIPTION

COLUMN_NAME

string

Name of the column

DEFAULT_VALUE

string

Column default value

NULLABLE

boolean

True if column nullable

PRECISION

int

Column precision

SCALE

int

Column scale

SCHEMA_NAME

string

Name of the view

TYPE

string

Column type

VIEW_NAME

string

Name of the view

INDEXES

The INDEXES view contains information about SQL indexes.

Column Data Type Description

INDEX_NAME

string

Name of the index

INDEX_TYPE

string

Type of the index

COLUMNS

string

Columns included in index

SCHEMA_NAME

string

Schema name

TABLE_NAME

string

Table name

CACHE_NAME

string

Cache name

CACHE_ID

int

Cache ID

INLINE_SIZE

int

Inline size in bytes

IS_PK

boolean

True if primary key index

IS_UNIQUE

boolean

True if unique index

PAGE_LISTS

The page list is a data structure used to store a list of partially free data pages (free lists) and fully free allocated pages (reuse lists). The purpose of the free lists and reuse lists is to quickly locate a page with enough free space to save an entry or to determine that no such page exists and a new page should be allocated. The page lists are organized in buckets. Each bucket group references pages with about the same size of a free space.

If Ignite persistence is enabled, the page lists are created for each partition of each cache group. To view such page lists use the CACHE_GROUP_PAGE_LISTS system view. If Ignite persistence is disabled, the page lists are created for each data region. In this case, the DATA_REGION_PAGE_LISTS system view needs to used. These views contain information about each bucket of each page list that is useful to understand how much data can be inserted into a cache without allocating new pages and also helps to detect skews in page lists utilization.

CACHE_GROUP_PAGE_LISTS

Column Data type Description

CACHE_GROUP_ID

int

Cache group ID

PARTITION_ID

int

Partition ID

NAME

string

Page list name

BUCKET_NUMBER

int

Bucket number

BUCKET_SIZE

long

Count of pages in the bucket

STRIPES_COUNT

int

Count of stripes used by this bucket. Stripes are used to avoid contention.

CACHED_PAGES_COUNT

int

Count of pages in an on-heap page list cache for this bucket.

DATA_REGION_PAGE_LISTS

Column Data type Description

NAME

string

Page list name

BUCKET_NUMBER

int

Bucket number

BUCKET_SIZE

long

Count of pages in the bucket

STRIPES_COUNT

int

Count of stripes used by this bucket. Stripes are used to avoid contention.

CACHED_PAGES_COUNT

int

Count of pages in an on-heap page list cache for this bucket.

PARTITION_STATES

This view exposes information about the distribution of cache group partitions across cluster nodes.

Column Data type Description

CACHE_GROUP_ID

int

Cache group ID

PARTITION_ID

int

Partition ID

NODE_ID

UUID

Node ID

STATE

string

Partition state. Possible states: MOVING - partition is being loaded from another node to this node; OWNING - this node is either a primary or backup owner; RENTING - this node is neither primary nor back up owner (is being currently evicted); EVICTED - partition has been evicted; LOST - partition state is invalid, the partition should not be used.

IS_PRIMARY

boolean

Primary partition flag