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Set memory partition mode in SQL Server Extended Event sessions #31989

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Oct 8, 2025
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Set memory partition mode in SQL Server Extended Event sessions #31989

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3 changes: 3 additions & 0 deletions content/en/database_monitoring/guide/sql_deadlock.md
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Original file line number Diff line number Diff line change
Expand Up @@ -46,6 +46,7 @@ Supported Agent versions
MAX_MEMORY = 1024 KB,
EVENT_RETENTION_MODE = ALLOW_SINGLE_EVENT_LOSS,
MAX_DISPATCH_LATENCY = 30 SECONDS,
MEMORY_PARTITION_MODE = PER_NODE, -- improves performance on multi-core systems (not supported on RDS)
STARTUP_STATE = ON
);
GO
Expand All @@ -54,6 +55,8 @@ Supported Agent versions
GO
```

**Note**: If you're using Amazon RDS for SQL Server, remove the `MEMORY_PARTITION_MODE = PER_NODE` line from the session configuration, as this option is not supported on RDS instances.

2. In the Datadog Agent, enable deadlocks in `sqlserver.d/conf.yaml`.
```yaml
deadlocks_collection:
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6 changes: 6 additions & 0 deletions content/en/database_monitoring/guide/sql_extended_events.md
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Original file line number Diff line number Diff line change
Expand Up @@ -111,6 +111,7 @@ WITH (
TRACK_CAUSALITY = ON, -- allows datadog to correlate related events across activity ID
EVENT_RETENTION_MODE = ALLOW_SINGLE_EVENT_LOSS,
MAX_DISPATCH_LATENCY = 30 SECONDS,
MEMORY_PARTITION_MODE = PER_NODE, -- improves performance on multi-core systems (not supported on RDS)
STARTUP_STATE = ON
);

Expand Down Expand Up @@ -156,13 +157,16 @@ WITH (
MAX_MEMORY = 1024 KB, -- do not change, setting this larger than 1 MB may result in data loss due to SQLServer internals
EVENT_RETENTION_MODE = ALLOW_SINGLE_EVENT_LOSS,
MAX_DISPATCH_LATENCY = 30 SECONDS,
MEMORY_PARTITION_MODE = PER_NODE, -- improves performance on multi-core systems (not supported on RDS)
STARTUP_STATE = ON
);

ALTER EVENT SESSION datadog_query_errors ON SERVER STATE = START;
GO
```

**Note**: If you're using Amazon RDS for SQL Server, remove the `MEMORY_PARTITION_MODE = PER_NODE` line from both session configurations, as this option is not supported on RDS instances.

2. In the Datadog Agent configuration, enable `xe_collection` in `sqlserver.d/conf.yaml`.
See the [sample conf.yaml.example][3] for all available configuration options.
```yaml
Expand Down Expand Up @@ -253,6 +257,7 @@ WITH (
TRACK_CAUSALITY = ON, -- allows datadog to correlate related events across activity ID
EVENT_RETENTION_MODE = ALLOW_SINGLE_EVENT_LOSS,
MAX_DISPATCH_LATENCY = 30 SECONDS,
MEMORY_PARTITION_MODE = PER_NODE, -- improves performance on multi-core systems
STARTUP_STATE = ON
);

Expand Down Expand Up @@ -298,6 +303,7 @@ WITH (
MAX_MEMORY = 1024 KB, -- do not change, setting this larger than 1 MB may result in data loss due to SQLServer internals
EVENT_RETENTION_MODE = ALLOW_SINGLE_EVENT_LOSS,
MAX_DISPATCH_LATENCY = 30 SECONDS,
MEMORY_PARTITION_MODE = PER_NODE, -- improves performance on multi-core systems
STARTUP_STATE = ON
);

Expand Down
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