MySQL Binlog信息查看

查看Binlog相关信息

##=====================================##
## 在MySQL内部查看binlog文件列表 ##
SHOW BINARY LOGS;

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##查看某个binglog文件中特定pos的操作
SHOW BINLOG EVENTS IN 'mysql-bin.000011' FROM 4742885 LIMIT 15;

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## 使用mysqlbinlog查看binlog ##
## 按时间过滤--start-datetime --stop-datetime，过滤时间格式为'2004-12-25 11:25:56'
## 按位置点过滤--start-position --stop-position，如果不能提供准确的pos值，则会报错
## 按照GTID过滤--include-gtids include-gtids
/export/servers/mysql/bin/mysqlbinlog -vv /export/data/mysql/data/mysql-bin.008735

/export/servers/mysql/bin/mysqlbinlog -vv /export/data/mysql/data/mysql-bin.008735 --start-datetime='2017-01-01 00:00:00' --stop-datetime='2017-01-02 00:00:00'

/export/servers/mysql/bin/mysqlbinlog -vv /export/data/mysql/data/mysql-bin.008735 --start-position=194 --stop-position=201

/export/servers/mysql/bin/mysqlbinlog -vv /export/data/mysql/data/mysql-bin.008735 --include-gtids="2aa60248-d8cf-11e8-a5c5-fa1622b12630:22652-22659"

##=====================================##
## 查看binlog 文件大小和最后修改时间 ##
ll -h --time-style='+%Y-%m-%d %H:%M:%S' /export/data/mysql/data/mysql-bin*

解析Binlog获取操作频率：

/export/servers/mysql/bin/mysqlbinlog --no-defaults --base64-output=decode-rows -vvv mysql-bin.001282 \
| awk '/###/ {if($0~/UPDATE|INSERT|SELECT/)count[$2" "$NF]++}END{for(i in count) print i,"\t",count[i]}' \
| column -t | sort -k3nr

对解析出的SQL文件进行解析，计算每张表操作次数和每秒操作次数：

1、先使用mysqlbinlog解析文件：

/export/servers/mysql/bin/mysqlbinlog --no-defaults --base64-output=decode-rows -vvv mysql-bin.001282 >/tmp/001282.sql

2、修改下面python文件中main部分的sql文件地址，然后执行

#!/usr/bin/env python
# -*- coding: utf-8 -*-
# =============================================================================
#     FileName:
#         Desc:
#       Author:
#        Email:
#     HomePage:
#      Version:
#   LastChange:
#      History:
# =============================================================================
import os

def write_file(file_path, file_content):
    file_handler = open(file_path, "w")
    file_handler.write(file_content)
    file_handler.close()

def get_table_summary(dump_sql_path):
    file_handler = open(dump_sql_path)
    table_dict = dict()
    for file_line in file_handler:
        if file_line.find("Table_map: ") > 0:
            start_index = file_line.index("Table_map:") + len("Table_map: ")
            end_index = file_line.index("mapped to", start_index)
            table_name = file_line[start_index:end_index].strip()
            if table_name in table_dict.keys():
                table_dict[table_name] += 1
            else:
                table_dict[table_name] = 1

    result_list = list()
    result_list.append("##=============按照表访问次数排序====================##")
    sorted_table_dict = sorted(table_dict.items(), key=lambda x: int(x[1]), reverse=True)
    for item in sorted_table_dict:
        result_list.append("{0}======================{1}".format(item[0], item[1]))
    result_list.append("##=============================================##")
    result_file = os.path.join(os.path.dirname(__file__), "binlog_table_summary.txt")
    write_file(result_file, "\n".join(result_list))

def get_binlog_time_summary(dump_sql_path):
    file_handler = open(dump_sql_path)
    datetime_dict = dict()
    for file_line in file_handler:
        if file_line.find("Table_map: ") > 0:
            start_index = 1
            end_index = file_line.index("server id", start_index)
            current_time = file_line[start_index:end_index].strip()
            if current_time in datetime_dict.keys():
                datetime_dict[current_time] += 1
            else:
                datetime_dict[current_time] = 1
    result_list = list()
    result_list.append("##=============按照时间访问排序====================##")
    sorted_time_dict = sorted(datetime_dict.items(), key=lambda x: x[0], reverse=True)
    for item in sorted_time_dict:
        result_list.append("{0}======================{1}".format(item[0], item[1]))
    result_list.append("##=============================================##")
    result_file = os.path.join(os.path.dirname(__file__), "binlog_time_summary.txt")
    write_file(result_file, "\n".join(result_list))

if __name__ == '__main__':
    sql_path = "/tmp/001282.sql"
    print("正在解析数据文件{0}，获取每表访问次数".format(sql_path))
    get_table_summary(dump_sql_path=sql_path)
    print("正在解析数据文件{0}，获取每秒访问次数".format(sql_path))
    get_binlog_time_summary(dump_sql_path=sql_path)
    print("解析完成")