Memory modules (DIMMs)

Plugin: proc.plugin Module: /sys/devices/system/edac/mc

Overview

The Error Detection and Correction (EDAC) subsystem is detecting and reporting errors in the system's memory, primarily ECC (Error-Correcting Code) memory errors.

The collector provides data for:

• Per memory controller (MC): correctable and uncorrectable errors. These can be of 2 kinds:

  • errors related to a DIMM
  • errors that cannot be associated with a DIMM

• Per memory DIMM: correctable and uncorrectable errors. There are 2 kinds:

  • memory controllers that can identify the physical DIMMS and report errors directly for them,
  • memory controllers that report errors for memory address ranges that can be linked to dimms. In this case the DIMMS reported may be more than the physical DIMMS installed.

This collector is supported on all platforms.

This collector supports collecting metrics from multiple instances of this integration, including remote instances.

Default Behavior

Auto-Detection

This integration doesn't support auto-detection.

Limits

The default configuration for this integration does not impose any limits on data collection.

Performance Impact

The default configuration for this integration is not expected to impose a significant performance impact on the system.

Metrics

Metrics grouped by scope.

The scope defines the instance that the metric belongs to. An instance is uniquely identified by a set of labels.

Per memory controller

These metrics refer to the memory controller.

Labels:

Label	Description
controller	mcX directory name of this memory controller.
mc_name	Memory controller type.
size_mb	The amount of memory in megabytes that this memory controller manages.
max_location	Last available memory slot in this memory controller.

Metrics:

Metric	Dimensions	Unit
mem.edac_mc_errors	correctable, uncorrectable, correctable_noinfo, uncorrectable_noinfo	errors

Per memory module

These metrics refer to the memory module (or rank, depends on the memory controller).

Labels:

Label	Description
controller	mcX directory name of this memory controller.
dimm	dimmX or rankX directory name of this memory module.
dimm_dev_type	Type of DRAM device used in this memory module. For example, x1, x2, x4, x8.
dimm_edac_mode	Used type of error detection and correction. For example, S4ECD4ED would mean a Chipkill with x4 DRAM.
dimm_label	Label assigned to this memory module.
dimm_location	Location of the memory module.
dimm_mem_type	Type of the memory module.
size	The amount of memory in megabytes that this memory module manages.

Metrics:

Metric	Dimensions	Unit
mem.edac_mc_errors	correctable, uncorrectable	errors

Alerts

The following alerts are available:

Alert name	On metric	Description
ecc_memory_mc_noinfo_correctable	mem.edac_mc_errors	memory controller ${label:controller} ECC correctable errors (unknown DIMM slot)
ecc_memory_mc_noinfo_uncorrectable	mem.edac_mc_errors	memory controller ${label:controller} ECC uncorrectable errors (unknown DIMM slot)
ecc_memory_dimm_correctable	mem.edac_mc_dimm_errors	DIMM ${label:dimm} controller ${label:controller} (location ${label:dimm_location}) ECC correctable errors
ecc_memory_dimm_uncorrectable	mem.edac_mc_dimm_errors	DIMM ${label:dimm} controller ${label:controller} (location ${label:dimm_location}) ECC uncorrectable errors

Setup

Prerequisites

No action required.

Configuration

File

There is no configuration file.

Options

There are no configuration options.

Examples

There are no configuration examples.