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fix(agent): count swap cache as used space (#2267)

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SwapCached pages have been read back into memory but still occupy allocated swap slots. Subtracting them from SwapTotal - SwapFree underreported swap usage compared with free, Glances, and gopsutil's canonical SwapMemory metric.
This commit is contained in:
Aditya Raj Singh
2026-08-26 21:12:40 +05:30
committed by GitHub
parent 4c48fe0c41
commit 0bc5470f08
2 changed files with 5 additions and 4 deletions
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3
agent/system.go
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@@ -343,7 +343,8 @@ func calculateHostMemoryUsage(v *mem.VirtualMemoryStat, htop bool) (used, cacheB
if htop {
used = saturatingSub(v.Total, v.Free, cacheBuff)
}
return used, cacheBuff, saturatingSub(v.SwapTotal, v.SwapFree, v.SwapCached)
// Cached swap pages still occupy swap slots and are included in `free`'s used value.
return used, cacheBuff, saturatingSub(v.SwapTotal, v.SwapFree)
}
// saturatingSub subtracts each value, returning zero on underflow.