DynamoDB Metrics and dimensions
When you interact with DynamoDB, it sends the following metrics and dimensions to CloudWatch. You can use the following procedures to view the metrics for DynamoDB.
To view metrics (console)
Metrics are grouped first by the service namespace, and then by the various dimension combinations within each namespace.

Open the CloudWatch console at https://console.amazonaws.cn/cloudwatch/
. 
In the navigation pane, choose Metrics.
Note 
Select the DynamoDB namespace.
To view metrics (CLI)

At a command prompt, use the following command:
aws cloudwatch listmetrics namespace "AWS/DynamoDB"
Viewing metrics and dimensions
The metrics and dimensions that DynamoDB sends to Amazon CloudWatch are listed here.
DynamoDB metrics
Amazon CloudWatch aggregates these metrics at oneminute intervals:

ConditionalCheckFailedRequests

ConsumedReadCapacityUnits

ConsumedWriteCapacityUnits

ReadThrottleEvents

ReturnedBytes

ReturnedItemCount

ReturnedRecordsCount

SuccessfulRequestLatency

SystemErrors

TimeToLiveDeletedItemCount

ThrottledRequests

TransactionConflict

UserErrors

WriteThrottleEvents
For all other DynamoDB metrics, the aggregation granularity is five minutes.
Not all statistics, such as Average or Sum, are applicable for every metric. However, all of these values are available through the Amazon DynamoDB console, or by using the CloudWatch console, Amazon CLI, or Amazon SDKs for all metrics.
In the following list, each metric has a set of valid statistics that are applicable to that metric.
List of Available Metrics
 AccountMaxReads
 AccountMaxTableLevelReads
 AccountMaxTableLevelWrites
 AccountMaxWrites
 AccountProvisionedReadCapacityUtilization
 AccountProvisionedWriteCapacityUtilization
 AgeOfOldestUnreplicatedRecord
 ConditionalCheckFailedRequests
 ConsumedChangeDataCaptureUnits
 ConsumedReadCapacityUnits
 ConsumedWriteCapacityUnits
 FailedToReplicateRecordCount
 MaxProvisionedTableReadCapacityUtilization
 MaxProvisionedTableWriteCapacityUtilization
 OnlineIndexConsumedWriteCapacity
 OnlineIndexPercentageProgress
 OnlineIndexThrottleEvents
 PendingReplicationCount
 ProvisionedReadCapacityUnits
 ProvisionedWriteCapacityUnits
 ReadThrottleEvents
 ReplicationLatency
 ReturnedBytes
 ReturnedItemCount
 ReturnedRecordsCount
 SuccessfulRequestLatency
 SystemErrors
 TimeToLiveDeletedItemCount
 ThrottledPutRecordCount
 ThrottledRequests
 TransactionConflict
 UserErrors
 WriteThrottleEvents
AccountMaxReads
The maximum number of read capacity units that can be used by an account. This limit does not apply to ondemand tables or global secondary indexes.
Units: Count
Valid Statistics:

Maximum
– The maximum number of read capacity units that can be used by an account.
AccountMaxTableLevelReads
The maximum number of read capacity units that can be used by a table or global secondary index of an account. For ondemand tables this limit caps the maximum read request units a table or a global secondary index can use.
Units: Count
Valid Statistics:

Maximum
– The maximum number of read capacity units that can be used by a table or global secondary index of the account.
AccountMaxTableLevelWrites
The maximum number of write capacity units that can be used by a table or global secondary index of an account. For ondemand tables this limit caps the maximum write request units a table or a global secondary index can use.
Units: Count
Valid Statistics:

Maximum
– The maximum number of write capacity units that can be used by a table or global secondary index of the account.
AccountMaxWrites
The maximum number of write capacity units that can be used by an account. This limit does not apply to ondemand tables or global secondary indexes.
Units: Count
Valid Statistics:

Maximum
– The maximum number of write capacity units that can be used by an account.
AccountProvisionedReadCapacityUtilization
The percentage of provisioned read capacity units utilized by an account.
Units: Percent
Valid Statistics:

Maximum
– The maximum percentage of provisioned read capacity units utilized by the account. 
Minimum
– The minimum percentage of provisioned read capacity units utilized by the account. 
Average
– The average percentage of provisioned read capacity units utilized by the account. The metric is published for fiveminute intervals. Therefore, if you rapidly adjust the provisioned read capacity units, this statistic might not reflect the true average.
AccountProvisionedWriteCapacityUtilization
The percentage of provisioned write capacity units utilized by an account.
Units: Percent
Valid Statistics:

Maximum
– The maximum percentage of provisioned write capacity units utilized by the account. 
Minimum
– The minimum percentage of provisioned write capacity units utilized by the account. 
Average
– The average percentage of provisioned write capacity units utilized by the account. The metric is published for fiveminute intervals. Therefore, if you rapidly adjust the provisioned write capacity units, this statistic might not reflect the true average.
AgeOfOldestUnreplicatedRecord
The elapsed time since a record yet to be replicated to the Kinesis data stream first appeared in the DynamoDB table.
Units: Milliseconds
Dimensions: TableName, DelegatedOperation
Valid Statistics:

Maximum
. 
Minimum
. 
Average
.
ConditionalCheckFailedRequests
The number of failed attempts to perform conditional writes.
The PutItem
, UpdateItem
, and
DeleteItem
operations let you provide a logical
condition that must evaluate to true before the operation can
proceed. If this condition evaluates to false,
ConditionalCheckFailedRequests
is incremented
by one. ConditionalCheckFailedRequests
is also
incremented by one for PartiQL Update and Delete statements
where a logical condition is provided and that condition
evaluates to false.
A failed conditional write will result in an HTTP 400
error (Bad Request). These events are reflected in the
ConditionalCheckFailedRequests
metric, but
not in the UserErrors
metric.
Units: Count
Dimensions: TableName
Valid Statistics:

Minimum

Maximum

Average

SampleCount

Sum
ConsumedChangeDataCaptureUnits
The number of consumed change data capture units.
Units: Count
Dimensions: TableName, DelegatedOperation
Valid Statistics:

Minimum

Maximum

Average
ConsumedReadCapacityUnits
The number of read capacity units consumed over the specified time period, so you can track how much of your provisioned throughput is used. You can retrieve the total consumed read capacity for a table and all of its global secondary indexes, or for a particular global secondary index. For more information, see Read/Write Capacity Mode.
The TableName
dimension returns the
ConsumedReadCapacityUnits
for the table, but
not for any global secondary indexes. To view
ConsumedReadCapacityUnits
for a global
secondary index, you must specify both TableName
and GlobalSecondaryIndexName
.
Use the Sum
statistic to calculate the
consumed throughput. For example, get the Sum
value over a span of one minute, and divide it by the number
of seconds in a minute (60) to calculate the average
ConsumedReadCapacityUnits
per second
(recognizing that this average does not highlight any large
but brief spikes in read activity that occurred during that
minute). You can compare the calculated value to the
provisioned throughput value that you provide DynamoDB.
Units: Count
Dimensions: TableName,
GlobalSecondaryIndexName
Valid Statistics:

Minimum
– The minimum number of read capacity units consumed by any individual request to the table or index. 
Maximum
– The maximum number of read capacity units consumed by any individual request to the table or index. 
Average
– The average perrequest read capacity consumed.Note The
Average
value is influenced by periods of inactivity where the sample value will be zero. 
Sum
– The total read capacity units consumed. This is the most useful statistic for theConsumedReadCapacityUnits
metric. 
SampleCount
– The number of read requests to DynamoDB, even if no read capacity was consumed.Note The
SampleCount
value is influenced by periods of inactivity where the sample value will be zero.
ConsumedWriteCapacityUnits
The number of write capacity units consumed over the specified time period, so you can track how much of your provisioned throughput is used. You can retrieve the total consumed write capacity for a table and all of its global secondary indexes, or for a particular global secondary index. For more information, see Read/Write Capacity Mode.
The TableName
dimension returns the
ConsumedWriteCapacityUnits
for the table, but
not for any global secondary indexes. To view
ConsumedWriteCapacityUnits
for a global
secondary index, you must specify both TableName
and GlobalSecondaryIndexName
.
Use the Sum
statistic to calculate the
consumed throughput. For example, get the Sum
value over a span of one minute, and divide it by the number
of seconds in a minute (60) to calculate the average
ConsumedWriteCapacityUnits
per second
(recognizing that this average does not highlight any large
but brief spikes in write activity that occurred during that
minute). You can compare the calculated value to the
provisioned throughput value that you provide DynamoDB.
Units: Count
Dimensions: TableName,
GlobalSecondaryIndexName
Valid Statistics:

Minimum
– The minimum number of write capacity units consumed by any individual request to the table or index. 
Maximum
– The maximum number of write capacity units consumed by any individual request to the table or index. 
Average
– The average perrequest write capacity consumed.Note The
Average
value is influenced by periods of inactivity where the sample value will be zero. 
Sum
– The total write capacity units consumed. This is the most useful statistic for theConsumedWriteCapacityUnits
metric. 
SampleCount
– The number of write requests to DynamoDB, even if no write capacity was consumed.Note The
SampleCount
value is influenced by periods of inactivity where the sample value will be zero.
FailedToReplicateRecordCount
The number of records that DynamoDB failed to replicate to your Kinesis data stream.
Units: Count
Dimensions: TableName
,
DelegatedOperation
Valid Statistics:

Minimum

Maximum

Average

SampleCount
MaxProvisionedTableReadCapacityUtilization
The percentage of provisioned read capacity utilized by the highest provisioned read table or global secondary index of an account.
Units: Percent
Valid Statistics:

Maximum
– The maximum percentage of provisioned read capacity units utilized by the highest provisioned read table or global secondary index of an account. 
Minimum
– The minimum percentage of provisioned read capacity units utilized by the highest provisioned read table or global secondary index of an account. 
Average
– The average percentage of provisioned read capacity units utilized by the highest provisioned read table or global secondary index of the account. The metric is published for fiveminute intervals. Therefore, if you rapidly adjust the provisioned read capacity units, this statistic might not reflect the true average.
MaxProvisionedTableWriteCapacityUtilization
The percentage of provisioned write capacity utilized by the highest provisioned write table or global secondary index of an account.
Units: Percent
Valid Statistics:

Maximum
– The maximum percentage of provisioned write capacity units utilized by the highest provisioned write table or global secondary index of an account. 
Minimum
– The minimum percentage of provisioned write capacity units utilized by the highest provisioned write table or global secondary index of an account. 
Average
– The average percentage of provisioned write capacity units utilized by the highest provisioned write table or global secondary index of the account. The metric is published for fiveminute intervals. Therefore, if you rapidly adjust the provisioned write capacity units, this statistic might not reflect the true average.
OnlineIndexConsumedWriteCapacity
The number of write capacity units consumed when adding a new global secondary index to a table. If the write capacity of the index is too low, incoming write activity during the backfill phase might be throttled. This can increase the time it takes to create the index. You should monitor this statistic while the index is being built to determine whether the write capacity of the index is underprovisioned.
You can adjust the write capacity of the index using the
UpdateTable
operation, even while the index is
still being built.
The ConsumedWriteCapacityUnits
metric for the
index does not include the write throughput consumed during
index creation.
Units: Count
Dimensions: TableName,
GlobalSecondaryIndexName
Valid Statistics:

Minimum

Maximum

Average

SampleCount

Sum
OnlineIndexPercentageProgress
The percentage of completion when a new global secondary index is being added to a table. DynamoDB must first allocate resources for the new index, and then backfill attributes from the table into the index. For large tables, this process might take a long time. You should monitor this statistic to view the relative progress as DynamoDB builds the index.
Units: Count
Dimensions: TableName,
GlobalSecondaryIndexName
Valid Statistics:

Minimum

Maximum

Average

SampleCount

Sum
OnlineIndexThrottleEvents
The number of write throttle events that occur when adding a new global secondary index to a table. These events indicate that the index creation will take longer to complete, because incoming write activity is exceeding the provisioned write throughput of the index.
You can adjust the write capacity of the index using the
UpdateTable
operation, even while the index is
still being built.
The WriteThrottleEvents
metric for the index does
not include any throttle events that occur during index
creation.
Units: Count
Dimensions: TableName,
GlobalSecondaryIndexName
Valid Statistics:

Minimum

Maximum

Average

SampleCount

Sum
PendingReplicationCount
Metric for Version 2017.11.29. It shows the number of item updates that are written to one replica table, but that have not yet been written to another replica in the global table.
Units: Count
Dimensions: TableName, ReceivingRegion
Valid Statistics:

Average

Sample Count

Sum
ProvisionedReadCapacityUnits
The number of provisioned read capacity units for a table or a global secondary index.The TableName
dimension returns the ProvisionedReadCapacityUnits
for
the table, but not for any global secondary indexes. To view
ProvisionedReadCapacityUnits
for a global secondary
index, you must specify both TableName
and
GlobalSecondaryIndexName
.
Units:Count
Dimensions: TableName,
GlobalSecondaryIndexName
Valid Statistics:

Minimum
– The lowest setting for provisioned read capacity. If you useUpdateTable
to increase read capacity, this metric shows the lowest value of provisionedReadCapacityUnits
during this time period. 
Maximum
– The highest setting for provisioned read capacity. If you useUpdateTable
to decrease read capacity, this metric shows the highest value of provisionedReadCapacityUnits
during this time period. 
Average
– The average provisioned read capacity. TheProvisionedReadCapacityUnits
metric is published at fiveminute intervals. Therefore, if you rapidly adjust the provisioned read capacity units, this statistic might not reflect the true average.
ProvisionedWriteCapacityUnits
The number of provisioned write capacity units for a table or a global secondary index.
The TableName
dimension returns the
ProvisionedWriteCapacityUnits
for the table,
but not for any global secondary indexes. To view
ProvisionedWriteCapacityUnits
for a global
secondary index, you must specify both TableName
and GlobalSecondaryIndexName
.
Units: Count
Dimensions: TableName,
GlobalSecondaryIndexName
Valid Statistics:

Minimum
– The lowest setting for provisioned write capacity. If you useUpdateTable
to increase write capacity, this metric shows the lowest value of provisionedWriteCapacityUnits
during this time period. 
Maximum
– The highest setting for provisioned write capacity. If you useUpdateTable
to decrease write capacity, this metric shows the highest value of provisionedWriteCapacityUnits
during this time period. 
Average
– The average provisioned write capacity. TheProvisionedWriteCapacityUnits
metric is published at fiveminute intervals. Therefore, if you rapidly adjust the provisioned write capacity units, this statistic might not reflect the true average.
ReadThrottleEvents
Requests to DynamoDB that exceed the provisioned read capacity units for a table or a global secondary index.
A single request can result in multiple events. For example, a
BatchGetItem
that reads 10 items is processed
as 10 GetItem
events. For each event,
ReadThrottleEvents
is incremented by one if
that event is throttled. The ThrottledRequests
metric for the entire BatchGetItem
is not
incremented unless all 10 of the
GetItem
events are throttled.
The TableName
dimension returns the
ReadThrottleEvents
for the table, but not for
any global secondary indexes. To view
ReadThrottleEvents
for a global secondary
index, you must specify both TableName
and
GlobalSecondaryIndexName
.
Units: Count
Dimensions: TableName,
GlobalSecondaryIndexName
Valid Statistics:

SampleCount

Sum
ReplicationLatency
(This metric is for DynamoDB global tables.) The elapsed time between an updated item appearing in the DynamoDB stream for one replica table, and that item appearing in another replica in the global table.
Units: Milliseconds
Dimensions: TableName, ReceivingRegion
Valid Statistics:

Average

Minimum

Maximum
ReturnedBytes
The number of bytes returned by GetRecords
operations (Amazon DynamoDB Streams) during the specified time period.
Units: Bytes
Dimensions: Operation, StreamLabel,
TableName
Valid Statistics:

Minimum

Maximum

Average

SampleCount

Sum
ReturnedItemCount
The number of items returned by Query
,
Scan
or ExecuteStatement
(select)
operations during the specified time period.
The number of items returned is not
necessarily the same as the number of items that were evaluated.
For example, suppose that you requested a Scan
on a
table or an index that had 100 items, but specified a
FilterExpression
that narrowed the results so
that only 15 items were returned. In this case, the response
from Scan
would contain a ScanCount
of
100 and a Count
of 15 returned items.
Units: Count
Dimensions: TableName, Operation
Valid Statistics:

Minimum

Maximum

Average

SampleCount

Sum
ReturnedRecordsCount
The number of stream records returned by
GetRecords
operations (Amazon DynamoDB Streams) during the
specified time period.
Units: Count
Dimensions: Operation, StreamLabel,
TableName
Valid Statistics:

Minimum

Maximum

Average

SampleCount

Sum
SuccessfulRequestLatency
The successful requests to DynamoDB or Amazon DynamoDB Streams during the
specified time period. SuccessfulRequestLatency
can
provide two different kinds of information:

The elapsed time for successful requests (
Minimum
,Maximum
,Sum
, orAverage
). 
The number of successful requests (
SampleCount
).
SuccessfulRequestLatency
reflects activity only
within DynamoDB or Amazon DynamoDB Streams, and does not take into account network
latency or clientside activity.
Units: Milliseconds
Dimensions: TableName, Operation
Valid Statistics:

Minimum

Maximum

Average

SampleCount
SystemErrors
The requests to DynamoDB or Amazon DynamoDB Streams that generate an HTTP 500 status code during the specified time period. An HTTP 500 usually indicates an internal service error.
Units: Count
Dimensions: TableName, Operation
Valid Statistics:

Sum

SampleCount
TimeToLiveDeletedItemCount
The number of items deleted by Time to Live (TTL) during the specified time period. This metric helps you monitor the rate of TTL deletions on your table.
Units: Count
Dimensions: TableName
Valid Statistics:

Sum
ThrottledPutRecordCount
The number of records that were throttled by your Kinesis data stream due to insufficient Kinesis Data Streams capacity.
Units: Count
Dimensions: TableName, DelegatedOperation
Valid Statistics:

Minimum

Maximum

Average

SampleCount
ThrottledRequests
Requests to DynamoDB that exceed the provisioned throughput limits on a resource (such as a table or an index).
ThrottledRequests
is incremented by one if any
event within a request exceeds a provisioned throughput limit.
For example, if you update an item in a table with global
secondary indexes, there are multiple events—a write to
the table, and a write to each index. If one or more of these
events are throttled, then ThrottledRequests
is
incremented by one.
In a batch request (BatchGetItem
or
BatchWriteItem
),
ThrottledRequests
is incremented only if
every request in the batch is
throttled.
If any individual request within the batch is throttled, one of the following metrics is incremented:

ReadThrottleEvents
– For a throttledGetItem
event withinBatchGetItem
. 
WriteThrottleEvents
– For a throttledPutItem
orDeleteItem
event withinBatchWriteItem
.
To gain insight into which event is throttling a request,
compare ThrottledRequests
with the
ReadThrottleEvents
and
WriteThrottleEvents
for the table and its
indexes.
A throttled request will result in an HTTP 400 status
code. All such events are reflected in the
ThrottledRequests
metric, but not in the
UserErrors
metric.
Units: Count
Dimensions: TableName, Operation
Valid Statistics:

Sum

SampleCount
TransactionConflict
Rejected itemlevel requests due to transactional conflicts between concurrent requests on the same items. For more information, see Transaction Conflict Handling in DynamoDB.
Units: Count
Dimensions: TableName
Valid Statistics:

Sum
– The number of rejected itemlevel requests due to transaction conflicts.Note If multiple itemlevel requests within a call to
TransactWriteItems
orTransactGetItems
were rejected,Sum
is incremented by one for each itemlevelPut
,Update
,Delete
, orGet
request. 
SampleCount
– The number of rejected requests due to transaction conflicts.Note If multiple itemlevel requests within a call to
TransactWriteItems
orTransactGetItems
are rejected,SampleCount
is only incremented by one. 
Min
– The minimum number of rejected itemlevel requests within a call toTransactWriteItems
,TransactGetItems
,PutItem
,UpdateItem
, orDeleteItem
. 
Max
– The maximum number of rejected itemlevel requests within a call toTransactWriteItems
,TransactGetItems
,PutItem
,UpdateItem
, orDeleteItem
. 
Average
– The average number of rejected itemlevel requests within a call toTransactWriteItems
,TransactGetItems
,PutItem
,UpdateItem
, orDeleteItem
.
UserErrors
Requests to DynamoDB or Amazon DynamoDB Streams that generate an HTTP 400 status code during the specified time period. An HTTP 400 usually indicates a clientside error, such as an invalid combination of parameters, an attempt to update a nonexistent table, or an incorrect request signature.
All such events are reflected in the UserErrors
metric, except for the following:

ProvisionedThroughputExceededException – See the
ThrottledRequests
metric in this section. 
ConditionalCheckFailedException – See the
ConditionalCheckFailedRequests
metric in this section.
UserErrors
represents the aggregate of HTTP 400
errors for DynamoDB or Amazon DynamoDB Streams requests for the current Amazon
Region and the current Amazon account.
Units: Count
Valid Statistics:

Sum

SampleCount
WriteThrottleEvents
Requests to DynamoDB that exceed the provisioned write capacity units for a table or a global secondary index.
A single request can result in multiple events. For example, a
PutItem
request on a table with three global
secondary indexes would result in four events—the table
write, and each of the three index writes. For each event, the
WriteThrottleEvents
metric is incremented by
one if that event is throttled. For single PutItem
requests, if any of the events are throttled,
ThrottledRequests
is also incremented by one.
For BatchWriteItem
, the
ThrottledRequests
metric for the entire
BatchWriteItem
is not incremented unless all of
the individual PutItem
or DeleteItem
events are throttled.
The TableName
dimension returns the
WriteThrottleEvents
for the table, but not for
any global secondary indexes. To view
WriteThrottleEvents
for a global secondary
index, you must specify both TableName
and
GlobalSecondaryIndexName
.
Units: Count
Dimensions: TableName,
GlobalSecondaryIndexName
Valid Statistics:

Sum

SampleCount
Understanding metrics and dimensions for DynamoDB
The metrics for DynamoDB are qualified by the values for the account, table name, global secondary index name, or operation. You can use the CloudWatch console to retrieve DynamoDB data along any of the dimensions in the table below.
List of Available Dimensions
DelegatedOperation
This dimension limits the data to operations DynamoDB performs on your behalf. The following operations are captured:

Change data capture for Kinesis Data Streams.
GlobalSecondaryIndexName
This dimension limits the data to a global secondary index on
a table. If you specify GlobalSecondaryIndexName
,
you must also specify TableName
.
Operation
This dimension limits the data to one of the following DynamoDB operations:

PutItem

DeleteItem

UpdateItem

GetItem

BatchGetItem

Scan

Query

BatchWriteItem

TransactWriteItems

TransactGetItems

ExecuteTransaction

BatchExecuteStatement

ExecuteStatement
In addition, you can limit the data to the following Amazon DynamoDB Streams operation:

GetRecords
OperationType
This dimension limits the data to one of the following operation types:

Read

Write
This dimension is emitted for ExecuteTransaction
and BatchExecuteStatement
requests.
Verb
This dimension limits the data to one of the following DynamoDB PartiQL verbs:

Insert:
PartiQLInsert

Select:
PartiQLSelect

Update:
PartiQLUpdate

Delete:
PartiQLDelete
This dimension is emitted for the
ExecuteStatement
operation.
ReceivingRegion
This dimension limits the data to a particular Amazon region. It is used with metrics originating from replica tables within a DynamoDB global table.
StreamLabel
This dimension limits the data to a specific stream label. It
is used with metrics originating from Amazon DynamoDB Streams
GetRecords
operations.
TableName
This dimension limits the data to a specific table. This value can be any table name in the current region and the current Amazon account.