Memory Usage
Plugin: proc.plugin Module: /proc/meminfo
Overview
/proc/meminfo provides detailed information about the system's current memory usage. It includes information
about different types of memory, RAM, Swap, ZSwap, HugePages, Transparent HugePages (THP), Kernel memory,
SLAB memory, memory mappings, and more.
Monitoring /proc/meminfo can be useful for:
-
Performance Tuning: Understanding your system's memory usage can help you make decisions about system tuning and optimization. For example, if your system is frequently low on free memory, it might benefit from more RAM.
-
Troubleshooting: If your system is experiencing problems,
/proc/meminfocan provide clues about whether memory usage is a factor. For example, if your system is slow and cached swap is high, it could mean that your system is swapping out a lot of memory to disk, which can degrade performance. -
Capacity Planning: By monitoring memory usage over time, you can understand trends and make informed decisions about future capacity needs.
This collector is supported on all platforms.
This collector only supports collecting metrics from a single instance of this integration.
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.
Setup
Prerequisites
No action required.
Configuration
Options
There are no configuration options.
via File
There is no configuration file.
Examples
There are no configuration examples.
Alerts
The following alerts are available:
| Alert name | On metric | Description |
|---|---|---|
| ram_in_use | system.ram | system memory utilization |
| ram_available | mem.available | percentage of estimated amount of RAM available for userspace processes, without causing swapping |
| used_swap | mem.swap | swap memory utilization |
| 1hour_memory_hw_corrupted | mem.hwcorrupt | amount of memory corrupted due to a hardware failure |
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 Usage instance
This scope has no labels.
Metrics:
| Metric | Description | Dimensions | Unit |
|---|---|---|---|
| system.ram | System RAM | free, used, cached, buffers | MiB |
| mem.available | Available RAM for applications | avail | MiB |
| mem.swap | System Swap | free, used | MiB |
| mem.swap_cached | Swap Memory Cached in RAM | cached | MiB |
| mem.zswap | Zswap Usage | in-ram, on-disk | MiB |
| mem.hwcorrupt | Corrupted Memory detected by ECC | HardwareCorrupted | MiB |
| mem.commited | Committed (Allocated) Memory | Commited_AS | MiB |
| mem.writeback | Writeback Memory | Dirty, Writeback, FuseWriteback, NfsWriteback, Bounce | MiB |
| mem.kernel | Memory Used by Kernel | Slab, KernelStack, PageTables, VmallocUsed, Percpu | MiB |
| mem.slab | Reclaimable Kernel Memory | reclaimable, unreclaimable | MiB |
| mem.hugepages | Dedicated HugePages Memory | free, used, surplus, reserved | MiB |
| mem.thp | Transparent HugePages Memory | anonymous, shmem | MiB |
| mem.thp_details | Details of Transparent HugePages Usage | ShmemPmdMapped, FileHugePages, FilePmdMapped | MiB |
| mem.reclaiming | Memory Reclaiming | Active, Inactive, Active(anon), Inactive(anon), Active(file), Inactive(file), Unevictable, Mlocked | MiB |
| mem.high_low | High and Low Used and Free Memory Areas | high_used, low_used, high_free, low_free | MiB |
| mem.cma | Contiguous Memory Allocator (CMA) Memory | used, free | MiB |
| mem.directmaps | Direct Memory Mappings | 4k, 2m, 4m, 1g | MiB |
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