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shell脚本清理redis模糊匹配的多个key，并计算释放内存大小

news 2025/7/4 3:26:16

#!/bin/bash# 定义Redis服务器地址和端口
REDIS_HOST="localhost"
REDIS_PORT=6380# 获取Redis当前内存使用量（以字节为单位）
function get_redis_memory_usage() {redis-cli -h $REDIS_HOST -p $REDIS_PORT INFO memory | grep "used_memory:" | cut -d: -f2 | tr -d '\r'
}# 删除匹配的键
function delete_matching_keys() {local key_pattern="$1"local keys=$(redis-cli -h $REDIS_HOST -p $REDIS_PORT -n 0 KEYS "$key_pattern")local keys_count=$(echo "$keys" | wc -l)if [ "$keys_count" -eq 0 ]; thenecho "没有找到匹配的键: $key_pattern"returnfi# 统计待删除的总键数total_keys_to_delete=$((total_keys_to_delete + keys_count))keys_to_delete+="$keys "
}# 定义匹配键的模式列表
KEY_PATTERNS=("saas_kline.*" "saas_depth.*" "saas_trade.*" "saas_ticker.*" "saas_depth20.*" "saas_mark_price.*" "saas_ticker_arr.*" "symbol_receiving_time" "jp_market:websocket:sub:*")# 初始化待删除键统计
total_keys_to_delete=0
keys_to_delete=""# 记录清理前的内存使用量
initial_memory=$(get_redis_memory_usage)# 逐个处理每个匹配模式
for pattern in "${KEY_PATTERNS[@]}"; dodelete_matching_keys "$pattern"
done# 记录清理后的内存使用量
final_memory=$(get_redis_memory_usage)# 显示所有匹配的键和键的数量
echo -e "$keys_to_delete"
echo "找到 $total_keys_to_delete 个匹配的键"# 等待用户确认
echo -n "你确定要删除以上键吗？(y/n): "
read -r confirm_deleteif [ "$confirm_delete" == "y" ]; then# 最终删除所有匹配的键while IFS= read -r key; dokey=$(echo "$key" | tr -d '\n') # 去掉换行符redis-cli -h $REDIS_HOST -p $REDIS_PORT -n 0 DEL "$key" > /dev/nullecho "正在删除 $key"done <<< "$keys_to_delete"# 计算内存差值（以字节为单位）并取绝对值memory_freed_kb=$((initial_memory - final_memory))memory_freed_kb_abs=$((memory_freed_kb < 0 ? -memory_freed_kb : memory_freed_kb))echo "已删除 $total_keys_to_delete 个键"echo "已释放内存: $memory_freed_kb_abs 字节"
elseecho "操作已取消"
fi