Service logs

SLS records operation logs and other log data for each project, and provides dashboards for real-time monitoring and O&M analysis.

Default configurations

Default configuration item	Configuration details
Logstore	Two dedicated Logstores are created by default: internal-diagnostic_log: Records consumer group latency, Logtail heartbeat logs, and task operational logs, distinguished by topic. Retention: 30 days (fixed). Free of charge. internal-operation_log: Records one log entry per request. Default retention: 30 days (modifiable). Billed the same as a standard Logstore. Service log types. Note Service log Logstores accept only SLS-generated logs. Queries, statistics, alerting, and real-time consumption work normally. Service log data follows standard SLS billing. Pay-by-feature billing items.
Region	Select Automatic Creation (Recommended) to create a Project in the same region. Or select an existing Project in the same region from the drop-down list.
Shard	Each Logstore has two shards by default with Automatic sharding enabled.
Log storage period	Default retention is 30 days, modifiable for all Logstores except `internal-diagnostic_log`. Manage Logstores.
Index	Enabled by default. To disable, go to Query & Analysis > Query & Analysis Properties and turn off indexing.
Dashboard	Created by default: Detailed logs Access traffic monitoring Access anomaly monitoring Critical logs Consumer group monitoring Overall Logtail status Logtail file collection monitoring Logtail anomaly monitoring Service log dashboards.

Determine if shard writes and consumption are balanced

Use the predefined dashboards to compare shard write and consumption trends.

Logstores in a project may share shards. Add a Logstore filter to view per-Logstore write distribution.
Monitor API request status

Each API call generates an entry in internal-operation_log. Failed requests return a Status code greater than 200 (for example, 404). Monitor entries where Status exceeds 200 to detect anomalies.
Check Logtail status

Enabling critical logs creates three Logtail dashboards by default: Overall Logtail status, Logtail file collection monitoring, and Logtail anomaly monitoring.