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：
- 使用
TypeScript文件打开远程工作区 - 等待"正在初始化
JS/TS语言功能"状态栏指示器停止出现。 - 运行此脚本以获取
ionotify观察程序进程列表：脚本 - 请注意命令类似于 ~/.vscode-server/cli/servers/Stable-e170252f762678dec6ca2cc69aba1570769a5d39/server/node 的进程数量
- 重新加载窗口
- 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
shell
#!/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-1122374716
main(){
# get terminal width
declare -i COLS=$(tput cols 2>/dev/null || echo 80)
declare -i WLEN=10
printf "\n%${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_watches
cat <<- 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" ]; then
limits
exit 0
fi
if [ "$1" = "--help" -o "$1" = "-h" ]; then
usage
exit 0
fi
if [ -n "$1" ]; then
printf "\nUnknown parameter '$1'\n" >&2
usage
exit 1
fi
generateData(){
local -i PROC
local -i PID
local -i CNT
local -i INSTANCES
local -i TOT
local -i TOTINSTANCES
# read process list into cache
local PSLIST="$(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 FDs
local 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 $2}'); done | cut -d" " -f 3 | sort | uniq -c |sort -nr)"
set -e
cat <<< "$INOTIFYCNT" |
{
while read -rs CNT PROC; do # count watches of processes found
echo "${PROC},${CNT},$(echo "$INOTIFYINSTANCES" | grep " ${PROC}$" |awk '{print $1}')"
done
} |
grep -v ",0," | # remove entires without watches
sort -n -t "," -k 2,3 -r | # sort to begin with highest numbers
{ # group commands so that $TOT is visible in the printf
IFS=","
while read -rs PID CNT INSTANCES; do # show watches and corresponding process info
printf "%$(( 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 -t
echo ""
}
main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。