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fix: améliorer calcul RAM (formule free: total-free-buffers-cached) + champs buffers/cached

This commit is contained in:
manus-admin 2026-06-01 01:35:28 +02:00
parent c534a87e4c
commit 664963b8f7
1 changed files with 16 additions and 4 deletions
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20
src/backend/src/docker.js
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@ -199,19 +199,28 @@ function getServerMetrics() {
cpuUsage = dTotal > 0 ? Math.round((1 - dIdle / dTotal) * 100) : 0;
} catch(e) {}
// RAM : lecture de /proc/meminfo (valeurs réelles de l'hôte)
// RAM : lecture de /proc/meminfo (valeurs réelles via lxcfs)
// Formule identique à `free` : used = total - free - buffers - cached
// Cela exclut le cache disque du noyau qui est libérable à tout moment
let memTotal = 8589934592; // 8 Go par défaut
let memFree = 0, memAvailable = 0, memUsed = 0;
let memFree = 0, memAvailable = 0, memUsed = 0, memBuffers = 0, memCached = 0;
try {
const meminfo = fs.readFileSync('/proc/meminfo', 'utf8');
const getVal = (key) => {
const m = meminfo.match(new RegExp(`^${key}:\\s+(\\d+)`, 'm'));
const m = meminfo.match(new RegExp(`^${key}:\s+(\d+)`, 'm'));
return m ? parseInt(m[1]) * 1024 : 0;
};
memTotal = getVal('MemTotal');
memFree = getVal('MemFree');
memAvailable = getVal('MemAvailable');
memUsed = memTotal - memAvailable;
memBuffers = getVal('Buffers');
// SReclaimable est la partie du slab cache récupérable (inclus dans Cached par free)
const sReclaimable = getVal('SReclaimable');
const shmem = getVal('Shmem');
memCached = getVal('Cached') + (sReclaimable > shmem ? sReclaimable - shmem : 0);
// RAM utilisée = total - libre - buffers - cache (= RAM applicative réelle)
memUsed = memTotal - memFree - memBuffers - memCached;
if (memUsed < 0) memUsed = memTotal - memAvailable; // fallback si lxcfs ne fournit pas Buffers/Cached
} catch(e) {}
// Disque : df sur la racine du conteneur (= hôte car pas de volume overlay)
@ -250,6 +259,9 @@ function getServerMetrics() {
used: memUsed,
free: memFree,
available: memAvailable,
buffers: memBuffers,
cached: memCached,
// usagePercent = RAM applicative réelle (hors cache disque, identique à `free`)
usagePercent: Math.round((memUsed / memTotal) * 100)
},
disk: {