目录

一、Linux安装Python3

1. 解压包

2. 安装环境

3. 生成编译脚本

4. 检查python3.10的编译器

5. 建立Python3和pip3的软链

6. 添加到PATH

7. 验证Python3和pip3是否正常

二、py_innodb_page_info.py工具

1. py_innodb_page_info.py

2. mylib.py

3. include.py

三、使用py_innodb_page_info.py工具

四、参考资料

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一、Linux安装Python3

1. 解压包

tar -zxvf Python-3.10.5.tgz

2. 安装环境

yum install gcc

yum install libffi-devel -y

3. 生成编译脚本

        进入解压目录下，使用下述命令来配置编译目录。注意--prefix路径是当前解压目录。

./configure --prefix=/home/python3/Python-3.10.5

        编译并安装，若下图所示：

make & make install 

4. 检查python3.10的编译器

        进入bin目录下执行以下命令：

./python3.10

5. 建立Python3和pip3的软链

        建立Python3和pip3的软链，若以下命令：

ln -s /home/python3/Python-3.10.5/bin/python3 /usr/bin/python3

ln -s /home/python3/Python-3.10.5/bin/pip3 /usr/bin/pip3 

6. 添加到PATH

1. 进入：vim /etc/profile
2. python的bin加入到PATH中：export PATH=$PATH:$JAVA_HOME/bin:/home/python3/Python-3.10.5/bin
3. 重启profile：source ~/.bash_profile

7. 验证Python3和pip3是否正常

python3 -V

pip3 -V

二、py_innodb_page_info.py工具

        此工具是《MySQL技术内幕 InnoDB存储引擎》作者姜承尧写的用来分析表空间中的各页的类型和信息，用python编写。

        此工具由三个文件组成：py_innodb_page_info.py、mylib.py、include.py。注意：需要放在同一个目录下。

1. py_innodb_page_info.py

#! /usr/bin/env python#encoding=utf-8import mylibfrom sys import argvfrom mylib import myargv if __name__ == '__main__':    myargv = myargv(argv)    if myargv.parse_cmdline() == 0:        pass    else:        mylib.get_innodb_page_type(myargv)
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2. mylib.py

#encoding=utf-8import osimport includefrom include import * TABLESPACE_NAME='/home/MySQL5.7/mysql-5.7.35/data/test_mysql/page_structure.ibd'VARIABLE_FIELD_COUNT = 1NULL_FIELD_COUNT = 0 class myargv(object):    def __init__(self, argv):        self.argv = argv        self.parms = {}        self.tablespace = ''       def parse_cmdline(self):        argv = self.argv        if len(argv) == 1:            print 'Usage: python py_innodb_page_info.py [OPTIONS] tablespace_file'            print 'For more options, use python py_innodb_page_info.py -h'            return 0        while argv:            if argv[0][0] == '-':                if argv[0][1] == 'h':                    self.parms[argv[0]] = ''                    argv = argv[1:]                    break                if argv[0][1] == 'v':                    self.parms[argv[0]] = ''                    argv = argv[1:]                           else:                    self.parms[argv[0]] = argv[1]                    argv = argv[2:]            else:                self.tablespace = argv[0]                argv = argv[1:]        if self.parms.has_key('-h'):            print 'Get InnoDB Page Info'            print 'Usage: python py_innodb_page_info.py [OPTIONS] tablespace_file\n'            print 'The following options may be given as the first argument:'            print '-h        help '            print '-o output put the result to file'            print '-t number thread to anayle the tablespace file'            print '-v        verbose mode'            return 0        return 1       def mach_read_from_n(page,start_offset,length):    ret = page[start_offset:start_offset+length]    return ret.encode('hex')   def get_innodb_page_type(myargv):    f=file(myargv.tablespace,'rb')    fsize = os.path.getsize(f.name)/INNODB_PAGE_SIZE    ret = {}    for i in range(fsize):        page = f.read(INNODB_PAGE_SIZE)        page_offset = mach_read_from_n(page,FIL_PAGE_OFFSET,4)        page_type = mach_read_from_n(page,FIL_PAGE_TYPE,2)        if myargv.parms.has_key('-v'):            if page_type == '45bf':                page_level = mach_read_from_n(page,FIL_PAGE_DATA+PAGE_LEVEL,2)                print "page offset %s, page type <%s>, page level <%s>"%(page_offset,innodb_page_type[page_type],page_level)            else:                print "page offset %s, page type <%s>"%(page_offset,innodb_page_type[page_type])        if not ret.has_key(page_type):            ret[page_type] = 1        else:            ret[page_type] = ret[page_type] + 1    print "Total number of page: %d:"%fsize    for type in ret:        print "%s: %s"%(innodb_page_type[type],ret[type])
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3. include.py

#encoding=utf-8INNODB_PAGE_SIZE = 16*1024*1024 # Start of the data on the pageFIL_PAGE_DATA = 38FIL_PAGE_OFFSET = 4 # page offset inside spaceFIL_PAGE_TYPE = 24 # File page type # Types of an undo log segment */TRX_UNDO_INSERT = 1TRX_UNDO_UPDATE = 2 # On a page of any file segment, data may be put starting from this offsetFSEG_PAGE_DATA = FIL_PAGE_DATA # The offset of the undo log page header on pages of the undo logTRX_UNDO_PAGE_HDR = FSEG_PAGE_DATA PAGE_LEVEL = 26    #level of the node in an index tree; the leaf level is the level 0 */          innodb_page_type={    '0000':u'Freshly Allocated Page',    '0002':u'Undo Log Page',    '0003':u'File Segment inode',    '0004':u'Insert Buffer Free List',    '0005':u'Insert Buffer Bitmap',    '0006':u'System Page',    '0007':u'Transaction system Page',    '0008':u'File Space Header',    '0009':u'扩展描述页',    '000a':u'Uncompressed BLOB Page',    '000b':u'1st compressed BLOB Page',    '000c':u'Subsequent compressed BLOB Page',    '45bf':u'B-tree Node'} innodb_page_direction={    '0000': 'Unknown(0x0000)',    '0001': 'Page Left',    '0002': 'Page Right',    '0003': 'Page Same Rec',    '0004': 'Page Same Page',    '0005': 'Page No Direction',    'ffff': 'Unkown2(0xffff)'}INNODB_PAGE_SIZE=1024*16
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三、使用py_innodb_page_info.py工具

        进入py_innodb_page_info.py所在的目录下，使用以下命令：

python py_innodb_page_info.py -v /home/MySQL5.7/mysql-5.7.35/data/test_mysql/test_init_table.ibd

[root@488c1daa7967 py_innodb_page_info]# [root@488c1daa7967 py_innodb_page_info]# pwd/home/py_innodb_page_info[root@488c1daa7967 py_innodb_page_info]# [root@488c1daa7967 py_innodb_page_info]# [root@488c1daa7967 py_innodb_page_info]# python py_innodb_page_info.py -v /home/MySQL5.7/mysql-5.7.35/data/test_mysql/test_init_table.ibdpage offset 00000000, page type <File Space Header>page offset 00000001, page type <Insert Buffer Bitmap>page offset 00000002, page type <File Segment inode>page offset 00000003, page type <B-tree Node>, page level <0000>page offset 00000000, page type <Freshly Allocated Page>page offset 00000000, page type <Freshly Allocated Page>Total number of page: 6:Freshly Allocated Page: 2Insert Buffer Bitmap: 1File Space Header: 1B-tree Node: 1File Segment inode: 1
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四、参考资料

Linux 安装Python3_Alex_Sheng_Sea的博客-CSDN博客_linux安装python

Download Python | Python.org

py_innodb_page_info工具使用_Hehuyi_In的博客-CSDN博客_py_innodb_page_info