《MySQL中强大的mysqladmin》要点: 本文介绍了MySQL中强大的mysqladmin,希望对您有用。如果有疑问,可以联系我们。
如果对MySQL的性能测试工具,比如sysbench做压力测试就可以看到我们关注的性能指标QPS,TPS,压测过程中的性能变化一目了然. 而在平时的工作中,如果也想看这个指标的值,使用sysbench就不合适了.所以我们得先了解下TPS,QPS是怎么计算的,没有sysbench这些工具,我们能不能算出来. 首先性能指标值我们是可以算出来的,我们通过show status能够得到一个实时变化的状态,里面的数值基本上都是累计值,我们可以通过设定频度来换算,由此得到一个近乎实时的状态数据. 这个时候mysqladmin就上场了,不光能够很方便的查看参数情况,比如mysqladmin var,很方便的查看参数等.mysqladmin shutdown来停库,mysqladmin flush-hosts,mysqladmin flush-privileges来刷新权限,或者使用mysqladmin pro来查看线程情况. QPS > show status like 'queries'; +---------------+---------+ | Variable_name | Value | +---------------+---------+ | Queries | 9978587 | +---------------+---------+ 1 row in set (0.00 sec)
> show status like 'queries'; +---------------+---------+ | Variable_name | Value | +---------------+---------+ | Queries | 9978588 | +---------------+---------+ 1 row in set (0.00 sec) TPS = (Com_commit + Com_rollback) / Seconds mysqladmin extended-status mysqladmin -r -i 1 extended-status|grep Innodb_pages_read # mysqladmin -r -i 1 extended-status|grep Handler_read_rnd_next | Handler_read_rnd_next | 6814 | Handler_read_rnd_next | 399 | Handler_read_rnd_next | 399 | Handler_read_rnd_next | 399 | Handler_read_rnd_next | 399 | Handler_read_rnd_next | 399 | Handler_read_rnd_next | 399
mysqladmin -r -i 1 extended-status |grep "Questions|Queries|Innodb_rows|Com_select |Com_insert |Com_update |Com_delete "
mysqladmin -r -i 1 ext | awk -F"|" '{ if($2 ~ /Variable_name/){ print " <------------- " strftime("%H:%M:%S") " ------------->"; } if($2 ~ /Questions|Queries|Innodb_rows|Com_select |Com_insert |Com_update |Com_delete |Innodb_buffer_pool_read_requests/) print $2 $3; }'
# sh aa.sh <------------- 23:07:24 -------------> Com_delete 6 Com_insert 4953706 Com_select 2672 Com_update 4 Innodb_buffer_pool_read_requests 67500881 Innodb_rows_deleted 10 Innodb_rows_inserted 8464857 Innodb_rows_read 46945213 Innodb_rows_updated 3 Queries 9978553 Questions 2454058 <------------- 23:07:25 -------------> Com_delete 0 Com_insert 0 Com_select 0 Com_update 0 Innodb_buffer_pool_read_requests 0 Innodb_rows_deleted 0 Innodb_rows_inserted 0 Innodb_rows_read 0 Innodb_rows_updated 0 Queries 1 Questions 1
mysqladmin -r -i 1 ext | awk -F"|" "BEGIN{ count=0; }" '{ if($2 ~ /Variable_name/ && ++count == 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 %11dn",innodb_lor,innodb_phr); }}' # sh aa.sh ----------|---------|--- MySQL Command Status --|----- Innodb row operation ----|-- Buffer Pool Read -- ---Time---|---QPS---|select insert update delete| read inserted updated deleted| logical physical 23:10:47 | 193| 64 1 2 0| 12296 1 2 0| 1755 0 23:10:48 | 129| 44 0 2 0| 11184 0 2 0| 1582 0 23:10:49 | 89| 33 0 1 0| 11898 0 1 0| 1667 0 23:10:50 | 138| 47 0 2 0| 7634 0 2 0| 1099 0 23:10:51 | 137| 38 0 3 0| 16537 0 3 0| 2232 0 简化版 mysqladmin extended-status -i1|awk 'BEGIN{local_switch=0;print "QPS Commit Rollback TPS Threads_con Threads_run n------------------------------------------------------- "} $2 ~ /Queries$/ {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(local_switch==0) {local_switch=1; count=0} else { if(count>10) {count=0;print "------------------------------------------------------- nQPS Commit Rollback TPS Threads_con Threads_run n------------------------------------------------------- ";} else{ count+=1; printf "%-6d %-8d %-7d %-8d %-10d %d n",q,c,r,c+r,tc,tr; } } }' # sh aa.sh QPS Commit Rollback TPS Threads_con Threads_run ------------------------------------------------------- 108 0 3 3 46 2 173 0 1 1 47 2 69 0 0 0 47 2 89 0 1 1 47 2 144 0 0 0 48 2 235 0 2 2 47 2 166 0 1 1 48 2
http://www.orczhou.com/index.php/2014/03/some-tricky-about-mysqladmin-extended-status/ https://segmentfault.com/a/1190000009506375
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