ScyllaDB University Live | Free Virtual Training Event
Learn more
ScyllaDB Documentation Logo Documentation
  • Server
  • Cloud
  • Tools
    • ScyllaDB Manager
    • ScyllaDB Monitoring Stack
    • ScyllaDB Operator
  • Drivers
    • CQL Drivers
    • DynamoDB Drivers
  • Resources
    • ScyllaDB University
    • Community Forum
    • Tutorials
Download
ScyllaDB Docs Scylla C/C++ Driver Features Metrics

Metrics¶

Performance metrics and diagnostic information can be obtained from the C/C++ driver using cass_session_get_metrics(). The resulting CassMetrics object contains several useful metrics for accessing request performance and/or debugging issues.

CassSession* session = cass_session_new();

/* Connect session */

CassMetrics metrics;

/* Get a snapshot of the driver's metrics */
cass_session_get_metrics(session, &metrics);

/* Run queries */

cass_session_free(session);

Request metrics¶

The requests field contains information about request latency and throughput. All latency times are in microseconds and throughput numbers are in requests per seconds.

Statistics¶

The stats field contains information about the total number of connections.

Errors¶

The errors field contains information about the occurrence of requests and connection timeouts. Request timeouts occur when a request fails to get a timely response (default: 12 seconds). Pending request timeouts occur whens a request waits too long to be serviced by an assigned host. This can occur when too many requests are in-flight for a single host. Connection timeouts occur when the process of establishing new connections is unresponsive (default: 5 seconds).

Was this page helpful?

PREVIOUS
Logging
NEXT
Scylla Specific Features
  • Create an issue
  • Edit this page

On this page

  • Metrics
    • Request metrics
    • Statistics
    • Errors
Scylla C/C++ Driver
  • master
    • master
  • C/C++ Driver for ScyllaDB
  • API Documentation
    • CassAggregateMeta
    • CassAuthenticator
    • CassAuthenticatorCallbacks
    • CassBatch
    • CassCluster
    • CassCollection
    • CassColumnMeta
    • CassCustomPayload
    • CassDataType
    • CassErrorResult
    • CassExecProfile
    • CassFunctionMeta
    • CassFuture
    • CassIndexMeta
    • CassInet
    • CassIterator
    • CassKeyspaceMeta
    • CassLogMessage
    • CassMaterializedViewMeta
    • CassMetrics
    • CassNode
    • CassPrepared
    • CassResult
    • CassRetryPolicy
    • CassRow
    • CassSchemaMeta
    • CassSession
    • CassSpeculativeExecutionMetrics
    • CassSsl
    • CassStatement
    • CassTableMeta
    • CassTimestampGen
    • CassTuple
    • CassUserType
    • CassUuid
    • CassUuidGen
    • CassValue
    • CassVersion
    • DseDateRange
    • DseDateRangeBound
    • DseLineString
    • DseLineStringIterator
    • DsePolygon
    • DsePolygonIterator
  • Features
    • Basics
      • Batches
      • Binding Parameters
      • Client-side timestamps
      • Consistency
      • Data Types
      • The date and time Types
      • Futures
      • Handling Results
      • Keyspaces
      • Prepared Statements
      • Schema Metadata
      • Tuples
      • User-Defined Types (UDTs)
      • UUIDs
    • Building
    • Client Configuration
    • Cloud
    • Configuration
      • Retry policies
    • Execution Profiles
    • FAQ
    • Installation
    • Logging
    • Metrics
    • Scylla Specific Features
    • Security
      • SSL
    • Testing
      • Cassandra Cluster Manager (CCM)
    • Tracing
  • DSE Features
    • Authentication
    • Geospatial types
Docs Tutorials University Contact Us About Us
© 2025, ScyllaDB. All rights reserved. | Terms of Service | Privacy Policy | ScyllaDB, and ScyllaDB Cloud, are registered trademarks of ScyllaDB, Inc.
Last updated on 28 April 2025.
Powered by Sphinx 7.4.7 & ScyllaDB Theme 1.8.6