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Include SReclaimable memory in Cache+Buffer memory

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By default the `SReclaimable` memory is counted into the `Used` memory, which is not correct (and is a reason why the default output differs from `free`).

Some references / sources: https://stackoverflow.com/a/66644946 https://www.logicmonitor.com/blog/right-way-to-monitor-linux-memory-again
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Tomáš Hromada 2022-04-21 14:03:13 +02:00 committed by GitHub
parent 10f9abba16
commit 1cec542e41
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1 changed files with 2 additions and 2 deletions
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4
prometheus/node-exporter-full.json
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@ -1311,7 +1311,7 @@
"step": 240 "step": 240
}, },
{ {
"expr": "node_memory_MemTotal_bytes{instance=\"$node\",job=\"$job\"} - node_memory_MemFree_bytes{instance=\"$node\",job=\"$job\"} - (node_memory_Cached_bytes{instance=\"$node\",job=\"$job\"} + node_memory_Buffers_bytes{instance=\"$node\",job=\"$job\"})", "expr": "node_memory_MemTotal_bytes{instance=\"$node\",job=\"$job\"} - node_memory_MemFree_bytes{instance=\"$node\",job=\"$job\"} - (node_memory_Cached_bytes{instance=\"$node\",job=\"$job\"} + node_memory_Buffers_bytes{instance=\"$node\",job=\"$job\"} + node_memory_SReclaimable_bytes{instance=\"$node\",job=\"$job\"})",
"format": "time_series", "format": "time_series",
"hide": false, "hide": false,
"intervalFactor": 1, "intervalFactor": 1,
@ -1320,7 +1320,7 @@
"step": 240 "step": 240
}, },
{ {
"expr": "node_memory_Cached_bytes{instance=\"$node\",job=\"$job\"} + node_memory_Buffers_bytes{instance=\"$node\",job=\"$job\"}", "expr": "node_memory_Cached_bytes{instance=\"$node\",job=\"$job\"} + node_memory_Buffers_bytes{instance=\"$node\",job=\"$job\"} + node_memory_SReclaimable_bytes{instance=\"$node\",job=\"$job\"}",
"format": "time_series", "format": "time_series",
"intervalFactor": 1, "intervalFactor": 1,
"legendFormat": "RAM Cache + Buffer", "legendFormat": "RAM Cache + Buffer",