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perf(memory): report real RSS and cut footprint via GOGC + periodic release

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The Usage card showed runtime.MemStats.Sys, a never-shrinking high-water mark of reserved address space that also counts memory already returned to the OS, so it overstated real usage (e.g. ~300 MB on an idle 1-client server). Report process RSS instead so the number matches the OS and drops as memory is freed.

Replace the auto GOMEMLIMIT that targeted ~90 percent of total system RAM (a near no-op while the heap sits far below the limit, and a GC-thrash risk on small/shared VPS per go.dev/doc/gc-guide) with: a lower default GOGC (XUI_GOGC, default 75), a periodic debug.FreeOSMemory job (XUI_MEMORY_RELEASE_INTERVAL, default 10m, 0 disables), and a soft limit applied only from an explicit budget (GOMEMLIMIT, XUI_MEMORY_LIMIT, or a real cgroup cap at 90 percent).
This commit is contained in:
MHSanaei
2026-06-25 22:16:38 +02:00
parent b32837e523
commit 69ad8b76e1
7 changed files with 138 additions and 38 deletions
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internal/web/service/server.go
+7 -3
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@@ -610,9 +610,13 @@ func (s *ServerService) GetStatus(lastStatus *Status) *Status {
}
// Application stats
var rtm runtime.MemStats
runtime.ReadMemStats(&rtm)
status.AppStats.Mem = rtm.Sys
if rss := sys.SelfRSS(); rss > 0 {
status.AppStats.Mem = rss
} else {
var rtm runtime.MemStats
runtime.ReadMemStats(&rtm)
status.AppStats.Mem = rtm.Sys
}
status.AppStats.Threads = uint32(runtime.NumGoroutine())
if p != nil && p.IsRunning() {
status.AppStats.Uptime = p.GetUptime()