mysql 案例 ~ 分析执行完的大事务

一 简介:今天咱们来聊聊如何定位以及执行完的大事务

二 目的:通过分析binlog脚本来定位执行的大事务

三 分析脚本

mysqlbinlog --base64-output=decode-rows -vv --start-datetime="" --stop-datetime="" binlog | awk
'BEGIN {xid="null";s_type=""; stm="";endtm="";intsta=0;inttal=0;s_count=0;count=0;insert_count=0;update_count=0;delete_count=0;flag=0;bf=0;period=0;}
{
if (match($0, /^(BEGIN)/)) {bg=1;}
if (match($0, /#.*server id/)) {if(bg==1){statm=substr($1,2,6)" "$2;cmd=sprintf("date -d "%s" +%%s", statm);cmd|getline intsta;close(cmd);bg=0;bf=1;}else if(bf==1){endtm=substr($1,2,6)" "$2;cmd=sprintf("date -d "%s" +%%s", endtm);cmd|getline inttal;close(cmd);}}
if(match($0, /#.*Table_map:.*mapped to number/)) {printf "Timestamp : " $1 " " $2 " Table : " $(NF-4); flag=1}
else if (match($0, /#.*Xid =.*/)) {xid=$(NF)}
else if (match($0, /(### INSERT INTO .*..*)/)) {count=count+1;insert_count=insert_count+1;s_type="INSERT"; s_count=s_count+1;}
else if (match($0, /(### UPDATE .*..*)/)) {count=count+1;update_count=update_count+1;s_type="UPDATE"; s_count=s_count+1;}
else if (match($0, /(### DELETE FROM .*..*)/)) {count=count+1;delete_count=delete_count+1;s_type="DELETE"; s_count=s_count+1;}
else if (match($0, /^(# at) /) && flag==1 && s_count>0) {print " Query Type : "s_type " " s_count " row(s) affected" ;s_type=""; s_count=0; }
else if (match($0, /^(COMMIT)/)) {period=inttal-intsta;if(inttal==0){period=0};print "[Transaction total : " count " Insert(s) : " insert_count " Update(s) : " update_count " Delete(s) : "
delete_count " Xid : "xid" period : "period" ] +----------------------+----------------------+----------------------+----------------------+";
count=0;insert_count=0;update_count=0; delete_count=0;s_type=""; s_count=0; flag=0;bf=0;bg=0;} } '

四 分析结果

 [Transaction total : 6 Insert(s) : 6 Update(s) : 0 Delete(s) : 0 Xid : 216917361 period : 0   period就是SQL执行时间,按照period排序,定位大事务即可