docs/root/configuration/observability/access_log/stats.rst
.. _config_access_log_stats:
Currently only the gRPC and file based access logs have statistics.
The gRPC access log has statistics rooted at access_logs.grpc_access_log. with the following statistics:
.. csv-table:: :header: Name, Type, Description :widths: 1, 1, 2
logs_written, Counter, Total log entries sent to the logger which were not dropped. This does not imply the logs have been flushed to the gRPC endpoint yet. logs_dropped, Counter, Total log entries dropped due to network or application level back up.
The file access log has statistics rooted at the filesystem. namespace.
.. csv-table:: :header: Name, Type, Description :widths: 1, 1, 2
write_buffered, Counter, Total number of times file data is moved to Envoy's internal flush buffer write_completed, Counter, Total number of times a file was successfully written write_failed, Counter, Total number of times an error occurred during a file write operation flushed_by_timer, Counter, Total number of times internal flush buffers are written to a file due to flush timeout reopen_failed, Counter, Total number of times a file was failed to be opened write_total_buffered, Gauge, Current total size of internal flush buffer in bytes
The Fluentd access log has statistics rooted at the access_logs.fluentd.<stat_prefix>. namespace.
.. csv-table:: :header: Name, Type, Description :widths: 1, 1, 2
entries_lost, Counter, Total number of times an access log entry was discarded due to unavailable connection. entries_buffered, Counter, Total number of entries (access log record) that was buffered/ events_sent, Counter, Total number of events (Fluentd Forward Mode events) sent to the upstream. reconnect_attempts, Counter, Total number of times an attempt to reconnect to the upstream has been made. connections_closed, Counter, Total number of times a connection to the upstream cluster was closed.