MySQL查詢系統信息

MySQL查詢系統信息

查詢系統狀態信息

使用：mysqladmin-ext的命令

作用

作爲MySQL使用SHOW GLOBAL STATUS 查看數據庫使用狀態的腳本。

便於分析數據庫使用情況：查詢，併發，連接數等等。

這裏作爲腳本進行格式化數據格式進行查詢。【方便查看，原始數據太多了】

腳本1

MySQL系統運行狀態實時監控，已測試 可用,數據比簡陋

#!/bin/bash

mysqladmin -uroot -p{password} ext -i1 | awk 'BEGIN{lswitch=0;
print "|QPS        |Commit     |Rollback   |TPS        |Threads_con  |Threads_run |";
print "------------------------------------------------------------------------------";}
$2 ~ /Queries$/ {q=$4-lq; lq=$4;}
$2 ~ /Com_commit$/ {c=$4-lc; lc=$4;}
$2 ~ /Com_rollback$/ {r=$4-lr; lr=$4;}
$2 ~ /Threads_connected$/ {tc=$4;}
$2 ~ /Threads_running$/ {tr=$4;
if (lswitch==0)
{
  lswitch=1;
  count=0;
} else {
  if (count>10) {
    count=0;
    print "------------------------------------------------------------------------------";
    print "|QPS        |Commit     |Rollback   |TPS        |Threads_con  |Threads_run |";
    print "------------------------------------------------------------------------------";
  } else {
    count+=1;
    printf ("|%-10d |%-10d |%-10d |%-10d |%-12d |%-12d| \n", q,c,r,c+r,tc,tr);
  }
}
}'

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腳本2

擴展更多數據的情況，已測試 可用，數據詳細完善

mysqladmin -P3306 -uroot -p -h127.0.0.1 -r -i 1 ext |\
awk -F"|" \
"BEGIN{ count=0; }"\
'{ if($2 ~ /Variable_name/ && ((++count)%20 == 1)){\
    print "----------|---------|--- MySQL Command Status --|----- Innodb row operation ----|-- Buffer Pool Read --";\
    print "---Time---|---QPS---|select insert update delete|  read inserted updated deleted|   logical    physical";\
}\
else if ($2 ~ /Queries/){queries=$3;}\
else if ($2 ~ /Com_select /){com_select=$3;}\
else if ($2 ~ /Com_insert /){com_insert=$3;}\
else if ($2 ~ /Com_update /){com_update=$3;}\
else if ($2 ~ /Com_delete /){com_delete=$3;}\
else if ($2 ~ /Innodb_rows_read/){innodb_rows_read=$3;}\
else if ($2 ~ /Innodb_rows_deleted/){innodb_rows_deleted=$3;}\
else if ($2 ~ /Innodb_rows_inserted/){innodb_rows_inserted=$3;}\
else if ($2 ~ /Innodb_rows_updated/){innodb_rows_updated=$3;}\
else if ($2 ~ /Innodb_buffer_pool_read_requests/){innodb_lor=$3;}\
else if ($2 ~ /Innodb_buffer_pool_reads/){innodb_phr=$3;}\
else if ($2 ~ /Uptime / && count >= 2){\
  printf(" %s |%9d",strftime("%H:%M:%S"),queries);\
  printf("|%6d %6d %6d %6d",com_select,com_insert,com_update,com_delete);\
  printf("|%6d %8d %7d %7d",innodb_rows_read,innodb_rows_inserted,innodb_rows_updated,innodb_rows_deleted);\
  printf("|%10d %11d\n",innodb_lor,innodb_phr);\
}}'

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查詢各個狀態的線程數量

使用： SHOW PROCESSLIST 命令 [P91]

作用

查詢數據庫各個狀態下的線程數，用以判斷是否存在線程堆積等的情況。

腳本

mysql -u root -p{password} -e 'SHOW PROCESSLIST\G' | grep State: | sort | uniq -c | sort -rn 

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其他

查看my.cnf文件地址：mysql --help | grep ‘Default options’ -A 1

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