自动抓取cpu消耗率高java 线程dump信息
# 设置参数
$DumpDir = "C:\gcDump\dump"
$CpuThreshold = 80
$LogFile = "C:\gcDump\log\monitor_log.txt"
# 循环监控 Java 进程
while ($true) {
# 获取当前时间
$CurrentTime = Get-Date -Format "yyyy-MM-dd HH:mm:ss.fff"
Write-Output "当前时间: $CurrentTime"
# 获取所有 Java 进程的 PID
$Pids = Get-WmiObject Win32_Process -Filter "Name='java.exe'" | Select-Object -ExpandProperty ProcessId
foreach ($JavaProcessId in $Pids) {
# 获取进程的 CPU 使用率
$Process = Get-WmiObject Win32_PerfFormattedData_PerfProc_Process | Where-Object { $_.IDProcess -eq $JavaProcessId }
if ($Process) {
$CpuUsage = $Process.PercentProcessorTime
Write-Output "检测 PID $JavaProcessId... 当前 CPU 使用率: $CpuUsage%"
Add-Content -Path $LogFile -Value "检测 PID $JavaProcessId... 当前 CPU 使用率: $CpuUsage%"
# 如果 CPU 使用率超过阈值，则生成线程转储文件
if ($CpuUsage -gt $CpuThreshold) {
$Timestamp = Get-Date -Format "yyyyMMddHHmmss"
# 获取 PID 使用资源最高的线程 ID
$ThreadIdHex = & jstack -l $JavaProcessId | Select-String -Pattern 'nid=0x' | Select-Object -First 1 -ExpandProperty Line
if ($ThreadIdHex) {
$ThreadIdHex = $ThreadIdHex.Trim() -replace '^.*nid=0x', ''
$ThreadIdHex = $ThreadIdHex.Split()[0]
} else {
$ThreadIdHex = "unknown"
}
$DumpFile = "$DumpDir\threaddump_${JavaProcessId}_${Timestamp}_${ThreadIdHex}.txt"
Write-Output "准备创建线程转储文件 $DumpFile..."
& jstack -l $JavaProcessId > $DumpFile
if ($LASTEXITCODE -ne 0) {
Write-Output "线程转储创建失败，错误码: $LASTEXITCODE"
Add-Content -Path $LogFile -Value "线程转储创建失败，错误码: $LASTEXITCODE"
} else {
Write-Output "Thread dump created for PID $JavaProcessId at $DumpFile"
Add-Content -Path $LogFile -Value "Thread dump created for PID $JavaProcessId at $DumpFile"
}
}
}
}
Start-Sleep -Seconds 2 # 每分钟检查一次
}
