vscode ssh-remote 疑似内存泄漏问题

vscode ssh-remote疑似内存泄漏问题

系统信息与版本号

版本：1.88.1（通用）
日期：2024-04-10T17:42:52.765Z
Electron: 28.2.8
ElectronBuildId: 27744544
Chromium：120.0.6099.291
Node.js：18.18.2
V8：12.0.267.19-electron.0
操作系统：Darwin x64 23.4.0

问题描述

vscode 的 ssh-remote 插件连接之后，会发现内存不断上涨，然后导致云主机崩溃。ubantu22.04与debian等系统均有这种情况。

疑似出现了内存泄漏，经过仔细检查发现vscode-server这个进程会不断添加新的进程进去，问题复现步骤：

1. 使用 TypeScript 文件打开远程工作区
2. 等待“正在初始化 JS/TS 语言功能”状态栏指示器停止出现。
3. 运行此脚本以获取 ionotify 观察程序进程列表：脚本
4. 请注意命令类似于 ~/.vscode-server/cli/servers/Stable-e170252f762678dec6ca2cc69aba1570769a5d39/server/node 的进程数量
5. 重新加载窗口
6. 重复步骤 2 到 4，你会发现步骤 4 中记下的数字比上次增加了。

脚本

#!/bin/bash# Get the procs sorted by the number of inotify watches
# @author Carl-Erik Kopseng
# @latest https://github.com/fatso83/dotfiles/blob/master/utils/scripts/inotify-consumers
# Discussion leading up to answer: https://unix.stackexchange.com/questions/15509/whos-consuming-my-inotify-resources
#
# If you need ultimate speed, use https://github.com/fatso83/dotfiles/commit/inotify-consumers-v1-fastest
# # Speed enhancements by Simon Matter <simon.matter@invoca.ch>
#
# A later PR introduced a significant slowdown to gain better output, but it is insignificant on most machines
# See this for details: https://github.com/fatso83/dotfiles/pull/10#issuecomment-1122374716main(){# get terminal widthdeclare -i COLS=$(tput cols 2>/dev/null || echo 80)declare -i WLEN=10printf "\n%${WLEN}s  %${WLEN}s\n" "INOTIFY" "INSTANCES"printf "%${WLEN}s  %${WLEN}s\n" "WATCHES" "PER   "printf "%${WLEN}s  %${WLEN}s  %s\n" " COUNT " "PROCESS "    "PID USER         COMMAND"printf -- "------------------------------------------------------------\n"generateData
}usage(){cat << EOF
Usage: $0 [--help|--limits]-l, --limits    Will print the current related limits and how to change them-h, --help      Show this help
EOF
}limits(){printf "\nCurrent limits\n-------------\n"sysctl fs.inotify.max_user_instances fs.inotify.max_user_watchescat <<- EOF
Changing settings permanently
-----------------------------
echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf
sudo sysctl -p # re-read config
EOF
}if [ "$1" = "--limits" -o "$1" = "-l" ]; thenlimitsexit 0
fiif [ "$1" = "--help" -o "$1" = "-h" ]; thenusageexit 0
fiif [ -n "$1" ]; thenprintf "\nUnknown parameter '$1'\n" >&2usageexit 1
figenerateData(){local -i PROClocal -i PIDlocal -i CNTlocal -i INSTANCESlocal -i TOTlocal -i TOTINSTANCES# read process list into cachelocal PSLIST="$(ps ax -o pid,user=WIDE-COLUMN,command --columns $(( COLS - WLEN )))"local INOTIFY="$(find /proc/[0-9]*/fdinfo -type f 2>/dev/null | xargs grep ^inotify 2>/dev/null)"local INOTIFYCNT="$(echo "$INOTIFY" | cut -d "/" -s --output-delimiter=" "  -f 3 |uniq -c | sed -e 's/:.*//')"# unique instances per process is denoted by number of inotify FDslocal INOTIFYINSTANCES="$(echo "$INOTIFY" | cut -d "/" -s --output-delimiter=" "   -f 3,5 | sed -e 's/:.*//'| uniq |awk '{print $1}' |uniq -c)"local INOTIFYUSERINSTANCES="$(echo "$INOTIFY" | cut -d "/" -s --output-delimiter=" "   -f 3,5 | sed -e 's/:.*//' | uniq |while read PID FD; do echo $PID $FD $(grep -e "^\ *${PID}\ " <<< "$PSLIST"|awk '{print $2}'); done | cut -d" "  -f 3 | sort | uniq -c |sort -nr)"set -ecat <<< "$INOTIFYCNT" |{while read -rs CNT PROC; do   # count watches of processes foundecho "${PROC},${CNT},$(echo "$INOTIFYINSTANCES" | grep " ${PROC}$" |awk '{print $1}')"done} |grep -v ",0," |                  # remove entires without watchessort -n -t "," -k 2,3 -r |         # sort to begin with highest numbers{                                # group commands so that $TOT is visible in the printfIFS=","while read -rs PID CNT INSTANCES; do   # show watches and corresponding process infoprintf "%$(( WLEN - 2 ))d  %$(( WLEN - 2 ))d     %s\n" "$CNT" "$INSTANCES" "$(grep -e "^\ *${PID}\ " <<< "$PSLIST")"TOT=$(( TOT + CNT ))TOTINSTANCES=$(( TOTINSTANCES + INSTANCES))done# These stats should be per-user as well, since inotify limits are per-user..printf "\n%$(( WLEN - 2 ))d  %s\n" "$TOT" "WATCHES TOTAL COUNT"
# the total across different users is somewhat meaningless, not printing for now.
#            printf "\n%$(( WLEN - 2 ))d  %s\n" "$TOTINSTANCES" "TOTAL INSTANCES COUNT"}echo ""echo "INotify instances per user (e.g. limits specified by fs.inotify.max_user_instances): "echo ""(echo "INSTANCES    USER"echo "-----------  ------------------"echo "$INOTIFYUSERINSTANCES") | column -techo ""}main

原问题网址

简单来描述这个问题，就是每次使用ssh-remote连接之后，会出现一个问题：

~/.vscode-server/cli/servers/Stable-…这个进程的数量增加了

当你关闭连接后，这个进程不会消失，但是下一次打开连接后，会产生新的进程，这样的结果就是导致进程数量不断增加导致占用的内存越来越多，最后导致系统崩溃重启。

修复方式

将 vscode 更新到预发布版本，开发者已经在最新的预发布版本中解决了这个问题。