mysqladmin是MySQL一個重要的客戶端,最常見的是使用它來關閉數(shù)據(jù)庫,除此,該命令還可以了解MySQL運行狀態(tài)、進程信息、進程殺死等。本文介紹一下如何使用mysqladmin extended-status(因為沒有"歧義",所以可以使用ext代替)了解MySQL的運行狀態(tài)。
1. 使用-r/-i參數(shù)
使用mysqladmin extended-status命令可以獲得所有MySQL性能指標,即show global status的輸出,不過,因為多數(shù)這些指標都是累計值,如果想了解當前的狀態(tài),則需要進行一次差值計算,這就是mysqladmin extended-status的一個額外功能,非常實用。默認的,使用extended-status,看到也是累計值,但是,加上參數(shù)-r(--relative),就可以看到各個指標的差值,配合參數(shù)-i(--sleep)就可以指定刷新的頻率,那么就有如下命令:
mysqladmin -uroot -r -i 1 -pxxx extended-status+------------------------------------------+----------------------+| Variable_name | Value |+------------------------------------------+----------------------+| Aborted_clients | 0 || Com_select | 336 || Com_insert | 243 |......| Threads_created | 0 |+------------------------------------------+----------------------+
2. 配合grep使用
配合grep使用,我們就有:
mysqladmin -uroot -r -i 1 -pxxx extended-status /|grep "Questions/|Queries/|Innodb_rows/|Com_select /|Com_insert /|Com_update /|Com_delete "| Com_delete | 1 || Com_delete_multi | 0 || Com_insert | 321 || Com_select | 286 || Com_update | 63 || Innodb_rows_deleted | 1 || Innodb_rows_inserted | 207 || Innodb_rows_read | 5211 || Innodb_rows_updated | 65 || Queries | 2721 || Questions | 2721 |
3. 配合簡單的awk使用
使用awk,同時輸出時間信息:
mysqladmin -uroot -p -h127.0.0.1 -P3306 -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;/}'<------------- 12:38:49 -------------> Com_delete 0 Com_insert 0 Com_select 0 Com_update 0 Innodb_buffer_pool_read_requests 589 Innodb_rows_deleted 0 Innodb_rows_inserted 2 Innodb_rows_read 50 Innodb_rows_updated 50 Queries 105 Questions 1 <------------- 12:38:50 -------------> Com_delete 0 Com_insert 0 Com_select 0 Com_update 0 Innodb_buffer_pool_read_requests 1814 Innodb_rows_deleted 0 Innodb_rows_inserted 0 Innodb_rows_read 8 Innodb_rows_updated 8 Queries 17 Questions 14. 配合復雜一點的awk
反正也不簡單了,那就更復雜一點,這樣讓輸出結果更友好點,因為awk不支持動態(tài)變量,所以代碼看起來比較復雜:
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);/}}'----------|---------|--- MySQL Command Status --|----- Innodb row operation ----|-- Buffer Pool Read -----Time---|---QPS---|select insert update delete| read inserted updated deleted| logical physical 10:37:13 | 2231| 274 214 70 0| 4811 160 71 0| 4146 0 10:37:14 | 2972| 403 256 84 23| 2509 173 85 23| 4545 0 10:37:15 | 2334| 282 232 66 1| 1266 154 67 1| 3543 0 10:37:15 | 2241| 271 217 66 0| 1160 129 66 0| 2935 0 10:37:17 | 2497| 299 224 97 0| 1141 149 95 0| 3831 0 10:37:18 | 2871| 352 304 74 23| 8202 226 73 23| 6167 0 10:37:19 | 2441| 284 233 82 0| 1099 121 78 0| 3292 0 10:37:20 | 2342| 279 242 61 0| 1083 224 61 0| 3366 0就這樣了,這幾個命令自己用的比較多,隨手分享出來。
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