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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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docker-compose.yml
+8 -4
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@@ -5,8 +5,8 @@ services:
dockerfile: ./Dockerfile
container_name: 3xui_app
# hostname: yourhostname <- optional
# Optional hard memory cap. When set, the panel auto-derives its Go soft
# limit (GOMEMLIMIT, ~90%) from this so it GCs before the OOM killer fires.
# Optional hard memory cap. When set, the panel derives its Go soft limit
# (GOMEMLIMIT, ~90% of this cap) so it GCs before the OOM killer fires.
# mem_limit: 512m
# The bundled Fail2ban (XUI_ENABLE_FAIL2BAN below) enforces the IP limit
# with iptables, which needs NET_ADMIN. Without these caps a ban is logged
@@ -21,8 +21,12 @@ services:
environment:
XRAY_VMESS_AEAD_FORCED: "false"
XUI_ENABLE_FAIL2BAN: "true"
# Go memory soft limit. If neither is set, the panel auto-detects the
# cgroup/host limit and targets ~90%. Pin it explicitly with one of:
# Memory tuning. The panel keeps RAM low via GOGC + periodic release; it no
# longer sets a soft limit from total host RAM (no benefit, risks GC thrash).
# XUI_GOGC: "75" # lower = less RAM, slightly more CPU; GOGC env overrides
# XUI_MEMORY_RELEASE_INTERVAL: "10" # minutes between FreeOSMemory; 0 disables
# Go memory soft limit, only applied from an explicit budget below (or a
# real cgroup/mem_limit cap). Pin it with one of:
# XUI_MEMORY_LIMIT: "400" # in MiB
# GOMEMLIMIT: "400MiB" # Go syntax, takes precedence
# XUI_PPROF: "true" # expose pprof on 127.0.0.1:6060 for profiling