#!/bin/bash

# 定義日志文件路徑
log_file="/path/to/memory_monitor.log"

# 獲取當(dāng)前時(shí)間
current_time=$(date +'%Y-%m-%d %H:%M:%S')

# 將當(dāng)前時(shí)間寫入日志文件
echo "[$current_time] Memory Monitoring Report" >> "$log_file"
echo "+------+------------------------------------------+-----------------+-----------------+" >> "$log_file"
echo "| PID  |        JAR名稱                            |   內(nèi)存使用(MB)  | Xmx參數(shù)(MB)     |" >> "$log_file"
echo "+------+------------------------------------------+-----------------+-----------------+" >> "$log_file"

# 獲取所有Java進(jìn)程的PID
java_pids=$(ps aux | grep java | grep -v grep | awk '{print $2}')

# 遍歷每個(gè)進(jìn)程霎槐，獲取其Jar包名稱、內(nèi)存使用情況和Xmx參數(shù)
for pid in $java_pids; do
    # 獲取進(jìn)程的命令行，包含Jar包路徑
    cmdline=$(cat /proc/$pid/cmdline 2>/dev/null | tr '\0' ' ')
    
    # 從命令行中提取Jar包名稱
    jar_name=$(echo "$cmdline" | grep -oP '[^ ]*\.jar' | awk -F '/' '{print $NF}')
    
    # 如果沒有找到Jar包名稱依溯，則跳過
    if [ -z "$jar_name" ]; then
        continue
    fi
    
    # 獲取進(jìn)程使用的內(nèi)存大忻泵ァ（單位：KB）岗钩，并轉(zhuǎn)換為MB
    mem_usage=$(pmap -x $pid 2>/dev/null | tail -n 1 | awk '{print $4/1024}')
    
    # 獲取進(jìn)程的-Xmx參數(shù)
    xmx_param=$(echo "$cmdline" | grep -oP '(\-Xmx[0-9]+[mMgGkK])' | awk '{print substr($1, 5)}')
    
    # 如果沒有找到-Xmx參數(shù)福侈，則默認(rèn)為空
    if [ -z "$xmx_param" ]; then
        xmx_param="N/A"
    fi
    
    # 輸出PID螟左、Jar包名稱购对、內(nèi)存使用情況和Xmx參數(shù)（右對(duì)齊）背捌，并寫入日志文件
    printf "| %-5s | %-40s | %-15.2f | %-15s |\n" "$pid" "$jar_name" "$mem_usage" "$xmx_param" >> "$log_file"
done

# 輸出表格底部和結(jié)束，并寫入日志文件
echo "+------+------------------------------------------+-----------------+-----------------+" >> "$log_file"
echo "" >> "$log_file"

# 打印日志文件路徑
echo "Memory monitoring report has been appended to: $log_file"

再通過crontab設(shè)置定時(shí)任務(wù)定時(shí)執(zhí)行該腳本

root@localhost:~# cat memory_monitor.log 
[2024-08-06 14:42:22] Memory Monitoring Report
+------+------------------------------------------+-----------------+-----------------+
| PID  |        JAR名稱                            |   內(nèi)存使用(MB)  | Xmx參數(shù)(MB)     |
+------+------------------------------------------+-----------------+-----------------+
| 36151 | testa-0.0.1-SNAPSHOT.jar                 | 457.35          | 600m            |
| 36153 | testtesDsta-0.0.1-SNAPSHOT.jar           | 497.46          | 700m            |
| 36155 | helloaa-0.0.1-SNAPSHOT.jar               | 328.83          | 300m            |
+------+------------------------------------------+-----------------+-----------------+