mysql的性能优化工具（源自韩锋大师，针对5.7修改）

发布时间：2020-08-10 12:11:43 来源：ITPUB博客阅读：418 作者：mcszycc 栏目：MySQL数据库

韩锋大师分享了一个mysql的性能优化工具，一个能自动采集SQL优化相关各种信息的python脚本，对于优化人员而言，这能省不少事，赞！
试用了一下，发现在mysql5.7下，运行不起来，细节上还是有好几个坑的，费了一些周折，终于把坑踩完了，现在把细节说明一下，并把修改后的SQL分享出来；
问题1：调用脚本时，若SQL是用单引号包含（韩老师就是这么示范的：python mysql_tuning.py -p tuning_sql.ini -s 'select xxx），但这样会报错，解决办法：用双引号分隔，如：python mysql_tuning.py -p tuning_sql.ini -s "select * from employees.dept_emp"这样就没问题；

问题2：没有引用string单元，在使用string.atoi时会报错，解决办法：import string；

问题3：mysql5.7后，infomation_schema的几个表INFORMATION_SCHEMA.GLOBAL_VARIABLES、INFORMATION_SCHEMA.SESSION_VARIABLES、 INFORMATION_SCHEMA.SESSION_STATUS要替换成performance_schema下的；

问题4：在显示执行计划时，table与type也是有可能是NULL的，要做空值处理，另外没有显示partitions栏位；

问题5：p_after_status[key]有可能是小数，所以用int去转换会报错，需要用float;

问题6：db_name显示成user_pwd了，这个或者不算问题；

修改后的脚本如下：

点击(此处)折叠或打开

#!/usr/local/bin/python
import datetime
import getopt
import sys
import string
import pprint
from warnings import filterwarnings
import MySQLdb
import ConfigParser
import sqlparse
from sqlparse.sql import IdentifierList, Identifier
from sqlparse.tokens import Keyword, DML
filterwarnings('ignore', category = MySQLdb.Warning)
seq1="+"
seq2="-"
seq3="|"
SYS_PARM_FILTER = (
'BINLOG_CACHE_SIZE',
'BULK_INSERT_BUFFER_SIZE',
'HAVE_PARTITION_ENGINE',
'HAVE_QUERY_CACHE',
'INTERACTIVE_TIMEOUT',
'JOIN_BUFFER_SIZE',
'KEY_BUFFER_SIZE',
'KEY_CACHE_AGE_THRESHOLD',
'KEY_CACHE_BLOCK_SIZE',
'KEY_CACHE_DIVISION_LIMIT',
'LARGE_PAGES',
'LOCKED_IN_MEMORY',
'LONG_QUERY_TIME',
'MAX_ALLOWED_PACKET',
'MAX_BINLOG_CACHE_SIZE',
'MAX_BINLOG_SIZE',
'MAX_CONNECT_ERRORS',
'MAX_CONNECTIONS',
'MAX_JOIN_SIZE',
'MAX_LENGTH_FOR_SORT_DATA',
'MAX_SEEKS_FOR_KEY',
'MAX_SORT_LENGTH',
'MAX_TMP_TABLES',
'MAX_USER_CONNECTIONS',
'OPTIMIZER_PRUNE_LEVEL',
'OPTIMIZER_SEARCH_DEPTH',
'QUERY_CACHE_SIZE',
'QUERY_CACHE_TYPE',
'QUERY_PREALLOC_SIZE',
'RANGE_ALLOC_BLOCK_SIZE',
'READ_BUFFER_SIZE',
'READ_RND_BUFFER_SIZE',
'SORT_BUFFER_SIZE',
'SQL_MODE',
'TABLE_CACHE',
'THREAD_CACHE_SIZE',
'TMP_TABLE_SIZE',
'WAIT_TIMEOUT'
)
def is_subselect(parsed):
if not parsed.is_group():
return False
for item in parsed.tokens:
if item.ttype is DML and item.value.upper() == 'SELECT':
return True
return False
def extract_from_part(parsed):
from_seen = False
for item in parsed.tokens:
#print item.ttype,item.value
if from_seen:
if is_subselect(item):
for x in extract_from_part(item):
yield x
elif item.ttype is Keyword:
raise StopIteration
else:
yield item
elif item.ttype is Keyword and item.value.upper() == 'FROM':
from_seen = True
def extract_table_identifiers(token_stream):
for item in token_stream:
if isinstance(item, IdentifierList):
for identifier in item.get_identifiers():
yield identifier.get_real_name()
elif isinstance(item, Identifier):
yield item.get_real_name()
# It's a bug to check for Keyword here, but in the example
# above some tables names are identified as keywords...
elif item.ttype is Keyword:
yield item.value
def extract_tables(p_sqltext):
stream = extract_from_part(sqlparse.parse(p_sqltext)[0])
return list(extract_table_identifiers(stream))
def f_find_in_list(myList,value):
try:
for v in range(0,len(myList)):
if value==myList[v]:
return 1
return 0
except:
return 0
def f_get_parm(p_dbinfo):
conn = MySQLdb.connect(host=p_dbinfo[0], user=p_dbinfo[1], passwd=p_dbinfo[2],db=p_dbinfo[3])
cursor = conn.cursor()
cursor.execute("select lower(variable_name),variable_value from performance_schema.global_variables where upper(variable_name) in ('"+"','".join(list(SYS_PARM_FILTER))+"') order by variable_name")
records = cursor.fetchall()
cursor.close()
conn.close()
return records
def f_print_parm(p_parm_result):
print "===== SYSTEM PARAMETER ====="
status_title=('parameter_name','value')
print "+--------------------------------+------------------------------------------------------------+"
print seq3,status_title[0].center(30),
print seq3,status_title[1].center(58),seq3
print "+--------------------------------+------------------------------------------------------------+"
for row in p_parm_result:
print seq3,row[0].ljust(30),
if 'size' in row[0]:
if string.atoi(row[1])>=1024*1024*1024:
print seq3,(str(round(string.atoi(row[1])/1024/1024/1024,2))+' G').rjust(58),seq3
elif string.atoi(row[1])>=1024*1024:
print seq3,(str(round(string.atoi(row[1])/1024/1024,2))+' M').rjust(58),seq3
elif string.atoi(row[1])>=1024:
print seq3,(str(round(string.atoi(row[1])/1024,2))+' K').rjust(58),seq3
else:
print seq3,(row[1]+' B').rjust(58),seq3
else:
print seq3,row[1].rjust(58),seq3
print "+--------------------------------+------------------------------------------------------------+"
print
def f_print_optimizer_switch(p_dbinfo):
print "===== OPTIMIZER SWITCH ====="
db = MySQLdb.connect(host=p_dbinfo[0], user=p_dbinfo[1], passwd=p_dbinfo[2],db=p_dbinfo[3])
cursor = db.cursor()
cursor.execute("select variable_value from performance_schema.global_variables where upper(variable_name)='OPTIMIZER_SWITCH'")
rows = cursor.fetchall()
print "+------------------------------------------+------------+"
print seq3,'switch_name'.center(40),
print seq3,'value'.center(10),seq3
print "+------------------------------------------+------------+"
for row in rows[0][0].split(','):
print seq3,row.split('=')[0].ljust(40),
print seq3,row.split('=')[1].rjust(10),seq3
print "+------------------------------------------+------------+"
cursor.close()
db.close()
print
def f_exec_sql(p_dbinfo,p_sqltext,p_option):
results={}
conn = MySQLdb.connect(host=p_dbinfo[0], user=p_dbinfo[1], passwd=p_dbinfo[2],db=p_dbinfo[3])
cursor = conn.cursor()
if f_find_in_list(p_option,'PROFILING'):
cursor.execute("set profiling=1")
cursor.execute("select ifnull(max(query_id),0) from INFORMATION_SCHEMA.PROFILING")
records = cursor.fetchall()
query_id=records[0][0] +2 #skip next sql
if f_find_in_list(p_option,'STATUS'):
#cursor.execute("select concat(upper(left(variable_name,1)),substring(lower(variable_name),2,(length(variable_name)-1))) var_name,variable_value var_value from performance_schema.session_status where variable_name in('"+"','".join(tuple(SES_STATUS_ITEM))+"') order by 1")
cursor.execute("select concat(upper(left(variable_name,1)),substring(lower(variable_name),2,(length(variable_name)-1))) var_name,variable_value var_value from performance_schema.session_status order by 1")
records = cursor.fetchall()
results['BEFORE_STATUS']=dict(records)
cursor.execute(p_sqltext)
if f_find_in_list(p_option,'STATUS'):
cursor.execute("select concat(upper(left(variable_name,1)),substring(lower(variable_name),2,(length(variable_name)-1))) var_name,variable_value var_value from performance_schema.session_status order by 1")
records = cursor.fetchall()
results['AFTER_STATUS']=dict(records)
if f_find_in_list(p_option,'PROFILING'):
cursor.execute("select STATE,DURATION,CPU_USER,CPU_SYSTEM,BLOCK_OPS_IN,BLOCK_OPS_OUT ,MESSAGES_SENT ,MESSAGES_RECEIVED ,PAGE_FAULTS_MAJOR ,PAGE_FAULTS_MINOR ,SWAPS from INFORMATION_SCHEMA.PROFILING where query_id="+str(query_id)+" order by seq")
records = cursor.fetchall()
results['PROFILING_DETAIL']=records
cursor.execute("SELECT STATE,SUM(DURATION) AS Total_R,ROUND(100*SUM(DURATION)/(SELECT SUM(DURATION) FROM INFORMATION_SCHEMA.PROFILING WHERE QUERY_ID="+str(query_id)+"),2) AS Pct_R,COUNT(*) AS Calls,SUM(DURATION)/COUNT(*) AS R_Call FROM INFORMATION_SCHEMA.PROFILING WHERE QUERY_ID="+str(query_id)+" GROUP BY STATE ORDER BY Total_R DESC")
records = cursor.fetchall()
results['PROFILING_SUMMARY']=records
cursor.close()
conn.close()
return results
def f_print_status(p_before_status,p_after_status):
print "===== SESSION STATUS (DIFFERENT) ====="
status_title=('status_name','before','after','diff')
print "+-------------------------------------+-----------------+-----------------+-----------------+"
print seq3,status_title[0].center(35),
print seq3,status_title[1].center(15),
print seq3,status_title[2].center(15),
print seq3,status_title[3].center(15),seq3
print "+-------------------------------------+-----------------+-----------------+-----------------+"
for key in sorted(p_before_status.keys()):
if p_before_status[key]<>p_after_status[key]:
print seq3,key.ljust(35),
print seq3,p_before_status[key].rjust(15),
print seq3,p_after_status[key].rjust(15),
print seq3,str(float(p_after_status[key])-float(p_before_status[key])).rjust(15),seq3
print "+-------------------------------------+-----------------+-----------------+-----------------+"
print
def f_print_time(p_starttime,p_endtime):
print "===== EXECUTE TIME ====="
print timediff(p_starttime,p_endtime)
print
def f_print_profiling(p_profiling_detail,p_profiling_summary):
print "===== SQL PROFILING(DETAIL)====="
status_title=('state','duration','cpu_user','cpu_sys','bk_in','bk_out','msg_s','msg_r','p_f_ma','p_f_mi','swaps')
print "+--------------------------------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+"
print seq3,status_title[0].center(30),
print seq3,status_title[1].center(8),
print seq3,status_title[2].center(8),
print seq3,status_title[3].center(8),
print seq3,status_title[4].center(8),
print seq3,status_title[5].center(8),
print seq3,status_title[6].center(8),
print seq3,status_title[7].center(8),
print seq3,status_title[8].center(8),
print seq3,status_title[9].center(8),
print seq3,status_title[10].center(8),seq3
print "+--------------------------------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+"
for row in p_profiling_detail:
print seq3,row[0].ljust(30),
print seq3,str(row[1]).rjust(8),
print seq3,str(row[2]).rjust(8),
print seq3,str(row[3]).rjust(8),
print seq3,str(row[4]).rjust(8),
print seq3,str(row[5]).rjust(8),
print seq3,str(row[6]).rjust(8),
print seq3,str(row[7]).rjust(8),
print seq3,str(row[8]).rjust(8),
print seq3,str(row[9]).rjust(8),
print seq3,str(row[10]).rjust(8),seq3
print "+--------------------------------+----------+----------+----------+----------+----------+----------+----------+----------+----------+----------+"
print 'bk_in: block_ops_in'
print 'bk_out: block_ops_out'
print 'msg_s: message sent'
print 'msg_r: message received'
print 'p_f_ma: page_faults_major'
print 'p_f_mi: page_faults_minor'
print
print "===== SQL PROFILING(SUMMARY)====="
status_title=('state','total_r','pct_r','calls','r/call')
print "+-------------------------------------+-----------------+------------+-------+-----------------+"
print seq3,status_title[0].center(35),
print seq3,status_title[1].center(15),
print seq3,status_title[2].center(10),
print seq3,status_title[3].center(5),
print seq3,status_title[4].center(15),seq3
print "+-------------------------------------+-----------------+------------+-------+-----------------+"
for row in p_profiling_summary:
print seq3,row[0].ljust(35),
print seq3,str(row[1]).rjust(15),
print seq3,str(row[2]).rjust(10),
print seq3,str(row[3]).rjust(5),
print seq3,str(row[4]).rjust(15),seq3
print "+-------------------------------------+-----------------+------------+-------+-----------------+"
print
def f_get_sqlplan(p_dbinfo,p_sqltext):
results={}
db = MySQLdb.connect(host=p_dbinfo[0], user=p_dbinfo[1], passwd=p_dbinfo[2],db=p_dbinfo[3])
cursor = db.cursor()
cursor.execute("explain extended "+p_sqltext)
records = cursor.fetchall()
results['SQLPLAN']=records
cursor.execute("show warnings")
records = cursor.fetchall()
results['WARNING']=records
cursor.close()
db.close()
return results
def f_print_sqlplan(p_sqlplan,p_warning):
plan_title=('id','select_type','table','partitions','type','possible_keys','key','key_len','ref','rows','filtered','Extra')
print "===== SQL PLAN ====="
print "+--------+------------------+------------+------------+------------+---------------+------------+------------+------------+------------+------------+------------+"
print seq3,plan_title[0].center(6),
print seq3,plan_title[1].center(16),
print seq3,plan_title[2].center(10),
print seq3,plan_title[3].center(10),
print seq3,plan_title[4].center(10),
print seq3,plan_title[5].center(10),
print seq3,plan_title[6].center(10),
print seq3,plan_title[7].center(10),
print seq3,plan_title[8].center(10),
print seq3,plan_title[9].center(10),
print seq3,plan_title[10].center(10),
print seq3,plan_title[11].center(10),seq3
print "+--------+------------------+------------+------------+------------+---------------+------------+------------+------------+------------+------------+------------+"
for row in p_sqlplan:
print seq3,str(row[0]).rjust(6), # id
print seq3,row[1].ljust(16), # select_type
#print seq3,row[2].ljust(10), # table
if not "NonyType" in str(type(row[2])):
print seq3,row[2].ljust(10),
else:
print seq3,"NULL".ljust(10),
if not "NoneType" in str(type(row[3])): #partitions
print seq3,row[3].ljust(10),
else:
print seq3,"NULL".ljust(10),
#print seq3,row[3].ljust(10),
if not "NoneType" in str(type(row[4])): #type
print seq3,row[4].ljust(10),
else:
print seq3,"NULL".ljust(10),
if not "NoneType" in str(type(row[5])): # possible_keys
print seq3,row[5].ljust(13),
else:
print seq3,"NULL".ljust(13),
if not "NoneType" in str(type(row[6])): # key
print seq3,row[6].ljust(10),
else:
print seq3,"NULL".ljust(10),
if not "NoneType" in str(type(row[7])): # key_len
print seq3,row[7].ljust(10),
else:
print seq3,"NULL".ljust(10),
if not "NoneType" in str(type(row[8])): # ref
print seq3,row[8].ljust(10),
else:
print seq3,"NULL".ljust(10),
print seq3,str(row[9]).rjust(10), # rows
print seq3,str(row[10]).rjust(10), # filters
if not "NoneType" in str(type(row[11])): # Extra
print seq3,row[11].ljust(10),
else:
print seq3,"NULL".ljust(10),
print seq3
print "+--------+------------------+------------+------------+------------+---------------+------------+------------+------------+------------+------------+------------+"
print
print "===== OPTIMIZER REWRITE SQL ====="
for row in p_warning:
print sqlparse.format(row[2],reindent=True, keyword_case='upper',strip_comments=True)
print
def f_get_table(p_dbinfo,p_sqltext):
r_tables=[]
db = MySQLdb.connect(host=p_dbinfo[0], user=p_dbinfo[1], passwd=p_dbinfo[2],db=p_dbinfo[3])
cursor = db.cursor()
cursor.execute("explain "+p_sqltext)
rows = cursor.fetchall ()
for row in rows:
table_name = row[2]
if '<' in table_name:
continue
if len(r_tables)==0:
r_tables.append(table_name)
elif f_find_in_list(r_tables,table_name) == -1:
r_tables.append(table_name)
cursor.close()
db.close()
return r_tables
def f_print_tableinfo(p_dbinfo,p_tablename):
plan_title=('table_name','engine','format','table_rows','avg_row','total_mb','data_mb','index_mb')
db = MySQLdb.connect(host=p_dbinfo[0], user=p_dbinfo[1], passwd=p_dbinfo[2],db=p_dbinfo[3])
cursor = db.cursor()
stmt = "select engine,row_format as format,table_rows,avg_row_length as avg_row,round((data_length+index_length)/1024/1024,2) as total_mb,round((data_length)/1024/1024,2) as data_mb,round((index_length)/1024/1024,2) as index_mb from information_schema.tables where table_schema='"+p_dbinfo[3]+"' and table_name='"+p_tablename+"'"
cursor.execute(stmt)
rows = cursor.fetchall ()
print "+-----------------+------------+------------+------------+------------+------------+------------+------------+"
print seq3,plan_title[0].center(15),
print seq3,plan_title[1].center(10),
print seq3,plan_title[2].center(10),
print seq3,plan_title[3].center(10),
print seq3,plan_title[4].center(10),
print seq3,plan_title[5].center(10),
print seq3,plan_title[6].center(10),
print seq3,plan_title[7].center(10),seq3
print "+-----------------+------------+------------+------------+------------+------------+------------+------------+"
for row in rows:
print seq3,p_tablename.ljust(15),
print seq3,row[0].ljust(10),
print seq3,row[1].ljust(10),
print seq3,str(row[2]).rjust(10),
print seq3,str(row[3]).rjust(10),
print seq3,str(row[4]).rjust(10),
print seq3,str(row[5]).rjust(10),
print seq3,str(row[6]).rjust(10),seq3
print "+-----------------+------------+------------+------------+------------+------------+------------+------------+"
cursor.close()
db.close()
def f_print_indexinfo(p_dbinfo,p_tablename):
plan_title=('index_name','non_unique','seq_in_index','column_name','collation','cardinality','nullable','index_type')
db = MySQLdb.connect(host=p_dbinfo[0], user=p_dbinfo[1], passwd=p_dbinfo[2],db=p_dbinfo[3])
cursor = db.cursor()
stmt = "select index_name,non_unique,seq_in_index,column_name,collation,cardinality,nullable,index_type from information_schema.statistics where table_schema='"+p_dbinfo[3]+"' and table_name='"+p_tablename+"' order by 1,3"
cursor.execute(stmt)
rows = cursor.fetchall ()
if len(rows)>0:
print "+-----------------+-----------------+-----------------+-----------------+-----------------+-----------------+-----------------+-----------------+"
print seq3,plan_title[0].center(15),
print seq3,plan_title[1].center(15),
print seq3,plan_title[2].center(15),
print seq3,plan_title[3].center(15),
print seq3,plan_title[4].center(15),
print seq3,plan_title[5].center(15),
print seq3,plan_title[6].center(15),
print seq3,plan_title[7].center(15),seq3
print "+-----------------+-----------------+-----------------+-----------------+-----------------+-----------------+-----------------+-----------------+"
for row in rows:
print seq3,row[0].ljust(15),
print seq3,str(row[1]).rjust(15),
print seq3,str(row[2]).rjust(15),
print seq3,str(row[3]).rjust(15),
print seq3,str(row[4]).rjust(15),
print seq3,str(row[5]).rjust(15),
print seq3,str(row[6]).rjust(15),
print seq3,str(row[7]).rjust(15),seq3
print "+-----------------+-----------------+-----------------+-----------------+-----------------+-----------------+-----------------+-----------------+"
cursor.close()
db.close()
def f_get_mysql_version(p_dbinfo):
db = MySQLdb.connect(host=p_dbinfo[0], user=p_dbinfo[1], passwd=p_dbinfo[2],db=p_dbinfo[3])
cursor = db.cursor()
cursor.execute("select @@version")
records = cursor.fetchall ()
cursor.close()
db.close()
return records[0][0]
def f_print_title(p_dbinfo,p_mysql_version,p_sqltext):
print '*'*100
print '*','MySQL SQL Tuning Tools v1.0 for mysql5.7(created by hanfeng modified by ycc)'.center(96),'*'
print '*'*100
print
print "===== BASIC INFORMATION ====="
title=('server_ip','user_name','db_name','db_version')
print "+----------------------+------------+------------+------------+"
print seq3,title[0].center(20),
print seq3,title[1].center(10),
print seq3,title[2].center(10),
print seq3,title[3].center(10),seq3
print "+----------------------+------------+------------+------------+"
print seq3,p_dbinfo[0].center(20),
print seq3,p_dbinfo[1].center(10),
print seq3,p_dbinfo[3].center(10),
print seq3,p_mysql_version.center(10),seq3
print "+----------------------+------------+------------+------------+"
print
print "===== ORIGINAL SQL TEXT ====="
print sqlparse.format(p_sqltext,reindent=True, keyword_case='upper')
print
'''
def f_print_table(p_value,p_option): #p_option "(key-n => title,max_len,align_value)"
for k in p_option.keys():
v = p_option[k]
print "+",
print int(v.split(',')[1])*"-",
print "+"
for k in p_option.keys():
v = p_option[k]
print "|",
print v.split(',')[0].center(int(v.split(',')[0])-2),
print "|",
for k in p_option.keys():
v = p_option[k]
print "+",
print int(v.split(',')[1])*"-",
print "+"
for row in p_value:
k=0
for col in row:
k+=1
print "|",
if p_option[k].split(',')[2]=='l':
print col.ljust(p_option[k].split(',')[1]),
elif p_option[k].split(',')[2]=='r':
print col.rjust(p_option[k].split(',')[1]),
else
print col.center(p_option[k].split(',')[1]),
print "|",
for k in p_option.keys():
v = p_option[k]
print "+",
print int(v.split(',')[1])*"-",
print "+"
'''
def timediff(timestart, timestop):
t = (timestop-timestart)
time_day = t.days
s_time = t.seconds
ms_time = t.microseconds / 1000000
usedtime = int(s_time + ms_time)
time_hour = usedtime / 60 / 60
time_minute = (usedtime - time_hour * 3600 ) / 60
time_second = usedtime - time_hour * 3600 - time_minute * 60
time_micsecond = (t.microseconds - t.microseconds / 1000000) / 1000
retstr = "%d day %d hour %d minute %d second %d microsecond " %(time_day, time_hour, time_minute, time_second, time_micsecond)
return retstr
if __name__=="__main__":
dbinfo=["","","",""] #dbhost,dbuser,dbpwd,dbname
sqltext=""
option=[]
config_file=""
mysql_version=""
opts, args = getopt.getopt(sys.argv[1:], "p:s:")
for o,v in opts:
if o == "-p":
config_file = v
elif o == "-s":
sqltext = v
config = ConfigParser.ConfigParser()
config.readfp(open(config_file,"rb"))
dbinfo[0] = config.get("database","server_ip")
dbinfo[1] = config.get("database","db_user")
dbinfo[2] = config.get("database","db_pwd")
dbinfo[3] = config.get("database","db_name")
mysql_version = f_get_mysql_version(dbinfo)
f_print_title(dbinfo,mysql_version,sqltext)
if config.get("option","sys_parm")=='ON':
parm_result = f_get_parm(dbinfo)
f_print_parm(parm_result)
f_print_optimizer_switch(dbinfo)
if config.get("option","sql_plan")=='ON':
sqlplan_result = f_get_sqlplan(dbinfo,sqltext)
f_print_sqlplan(sqlplan_result['SQLPLAN'],sqlplan_result['WARNING'])
if config.get("option","obj_stat")=='ON':
print "===== OBJECT STATISTICS ====="
for table_name in extract_tables(sqltext):
f_print_tableinfo(dbinfo,table_name)
f_print_indexinfo(dbinfo,table_name)
print
if config.get("option","ses_status")=='ON':
option.append('STATUS')
if config.get("option","sql_profile")=='ON':
option.append('PROFILING')
if config.get("option","ses_status")=='ON' or config.get("option","sql_profile")=='ON':
starttime = datetime.datetime.now()
exec_result = f_exec_sql(dbinfo,sqltext,option)
endtime = datetime.datetime.now()
if config.get("option","ses_status")=='ON':
f_print_status(exec_result['BEFORE_STATUS'],exec_result['AFTER_STATUS'])
if config.get("option","sql_profile")=='ON':
f_print_profiling(exec_result['PROFILING_DETAIL'],exec_result['PROFILING_SUMMARY

向AI问一下细节

mysql的性能优化工具（源自韩锋大师，针对5.7修改）

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