[mysqldumpslow 报错] Died at /usr/local/mysql/bin/mysqldumpslow line 161, chunk 236. mysqldumpslow报错: Died at /usr/local/mysql/bin/mysqldumpslow line 161, chunk 236. 总结:是因为top数目太多了,mysqldumpslow遍历不过来的缘故。 /usr/local/m
[mysqldumpslow 报错] Died at /usr/local/mysql/bin/mysqldumpslow line 161, chunk 236.mysqldumpslow报错:Died at /usr/local/mysql/bin/mysqldumpslow line 161, chunk 236.
总结:是因为top数目太多了,mysqldumpslow遍历不过来的缘故。
/usr/local/mysql/bin/mysqldumpslow -s -t 15 /root/db01-102-slow.log
1,把r去掉试试,还是报错,参数不识别。
[root@slave ]# /usr/local/mysql/bin/mysqldumpslow -s -t 15 /root/db01-102-slow.log Reading mysql slow query log from 15 /root/db01-102-slow.log Can't open 15: 没有那个文件或目录 at /usr/local/mysql/bin/mysqldumpslow line 91. Count: 22 Time=9.61s (211s) Lock=0.00s (0s) Rows=1.0 (22), [dubbo]@2hosts select count(*) from coupon_lot left join coupon on coupon.coupon_lot_id = coupon_lot.coupon_lot_id LEFT JOIN brand ON brand.brand_id=coupon_lot.brand_id LEFT JOIN product_category on product_category.category_id=coupon_lot.category_id Count: 177 Time=1.40s (247s) Lock=0.00s (0s) Rows=1.0 (177), [dubbo]@2hosts select count(*) from user_info LEFT JOIN system_region a ON province_id =a.region_id LEFT JOIN system_region b ON city_id = b.region_id LEFT JOIN system_region c ON district_id = c.region_id Count: 22 Time=13.20s (290s) Lock=0.00s (0s) Rows=10.0 (220), [dubbo]@2hosts select coupon_id, coupon_lot.coupon_lot_id, coupon_lot.remark, coupon.code, coupon_lot.coupon_type, coupon.state, coupon_lot.ckey, coupon_lot.cvalue, coupon_lot.discount, coupon_lot.type, coupon_lot.channel, coupon_lot.is_reusable, coupon_lot.start_datetime, coupon_lot.end_datetime, coupon_lot.create_datetime, coupon.update_datetime ,coupon_lot.department, coupon_lot.state as couponLotState, coupon_lot.create_operator,coupon_lot.coupon_category, coupon_lot.pdt_code,brand.brand_name,product_category.category_name from coupon_lot left join coupon on coupon.coupon_lot_id = coupon_lot.coupon_lot_id LEFT JOIN brand ON brand.brand_id=coupon_lot.brand_id LEFT JOIN product_category on product_category.category_id=coupon_lot.category_id group by coupon_lot.coupon_lot_id order by coupon_lot.create_datetime DESC limit N,N Count: 8 Time=1.09s (8s) Lock=0.00s (0s) Rows=10.0 (80), [dubbo]@2hosts select return_sn, relating_order_sn, return_from, oi.order_out_sn , add_time , return_type, return_pay, ui.usename as userName, return_consignee, return_goods_count , return_total_fee, total_paid, return_desc, return_order_status, return_pay_status , return_shipping_status, order_return.lock_operator, order_return.return_invoice_no from order_return LEFT JOIN order_info oi on order_return.relating_order_sn = oi.order_sn left join user_info ui on oi.user_id = ui.user_id left join order_payment on order_payment.order_sn = oi.order_sn order by order_return.add_time DESC limit N,N Count: 1 Time=1.00s (1s) Lock=0.00s (0s) Rows=1.0 (1), root[root]@localhost select sleep(N) Count: 1 Time=1.13s (1s) Lock=0.00s (0s) Rows=10.0 (10), [dubbo]@[xx] select return_sn, relating_order_sn, return_from, oi.order_out_sn , add_time , return_type, return_pay, ui.usename as userName, return_consignee, return_goods_count , return_total_fee, total_paid, return_desc, return_order_status, return_pay_status , return_shipping_status, order_return.lock_operator, order_return.return_invoice_no from order_return LEFT JOIN order_info oi on order_return.relating_order_sn = oi.order_sn left join user_info ui on oi.user_id = ui.user_id left join order_payment on order_payment.order_sn = oi.order_sn order by order_return.add_time DESC , oi.order_sn limit N,N Count: 5 Time=2.47s (12s) Lock=0.00s (0s) Rows=0.0 (0), [dubbo]@2hosts select user_id, usename, nickname, password, user_group_id, realname, gender, email, mobilephone, birthday, province_id, city_id, district_id, marry, income, remarks, create_datetime, active_state, verityEmail, verityPhone, credit, last_login, last_ip, is_locked, channel, tag, union_partner_uuid, union_user_safekey, is_black, qq, weibo_id, verity_email_key, verity_phone_key, verity_email_datetime, verity_phone_datetime, verity_question, verity_answer, cps_code, cps_time_from, cps_time_to, cps_cookie, first_channel from user_info where mobilephone = 'S' and (channel is null or trim(channel) ='S')
2,查看下mysqldumpslow 使用参数,-s后面需要带参数的,看了西夏at比较合适
[root@db-master-2 ~]# /usr/local/mysql/bin/mysqldumpslow --help Usage: mysqldumpslow [ OPTS... ] [ LOGS... ] Parse and summarize the MySQL slow query log. Options are --verbose verbose --debug debug --help write this text to standard output -v verbose -d debug -s ORDER what to sort by (al, at, ar, c, l, r, t), 'at' is default al: average lock time ar: average rows sent at: average query time c: count l: lock time r: rows sent t: query time -r reverse the sort order (largest last instead of first) -t NUM just show the top n queries -a don't abstract all numbers to N and strings to 'S' -n NUM abstract numbers with at least n digits within names -g PATTERN grep: only consider stmts that include this string -h HOSTNAME hostname of db server for *-slow.log filename (can be wildcard), default is '*', i.e. match all -i NAME name of server instance (if using mysql.server startup script) -l don't subtract lock time from total time
[root@db-master-2 ~]# /usr/local/mysql/bin/mysqldumpslow -s at -t 15 /root/db01-102-slow.log Reading mysql slow query log from /root/db01-102-slow.log Count: 22 Time=13.20s (290s) Lock=0.00s (0s) Rows=10.0 (220), [dubbo]@2hosts select coupon_id, coupon_lot.coupon_lot_id, coupon_lot.remark, coupon.code, coupon_lot.coupon_type, coupon.state, coupon_lot.ckey, coupon_lot.cvalue, coupon_lot.discount, coupon_lot.type, coupon_lot.channel, coupon_lot.is_reusable, coupon_lot.start_datetime, coupon_lot.end_datetime, coupon_lot.create_datetime, coupon.update_datetime ,coupon_lot.department, coupon_lot.state as couponLotState, coupon_lot.create_operator,coupon_lot.coupon_category, coupon_lot.pdt_code,brand.brand_name,product_category.category_name from coupon_lot left join coupon on coupon.coupon_lot_id = coupon_lot.coupon_lot_id LEFT JOIN brand ON brand.brand_id=coupon_lot.brand_id LEFT JOIN product_category on product_category.category_id=coupon_lot.category_id group by coupon_lot.coupon_lot_id order by coupon_lot.create_datetime DESC limit N,N Count: 22 Time=9.61s (211s) Lock=0.00s (0s) Rows=1.0 (22), [dubbo]@2hosts select count(*) from coupon_lot left join coupon on coupon.coupon_lot_id = coupon_lot.coupon_lot_id LEFT JOIN brand ON brand.brand_id=coupon_lot.brand_id LEFT JOIN product_category on product_category.category_id=coupon_lot.category_id Count: 5 Time=2.47s (12s) Lock=0.00s (0s) Rows=0.0 (0), [dubbo]@2hosts select user_id, usename, nickname, password, user_group_id, realname, gender, email, mobilephone, birthday, province_id, city_id, district_id, marry, income, remarks, create_datetime, active_state, verityEmail, verityPhone, credit, last_login, last_ip, is_locked, channel, tag, union_partner_uuid, union_user_safekey, is_black, qq, weibo_id, verity_email_key, verity_phone_key, verity_email_datetime, verity_phone_datetime, verity_question, verity_answer, cps_code, cps_time_from, cps_time_to, cps_cookie, first_channel from user_info where mobilephone = 'S' and (channel is null or trim(channel) ='S') Count: 177 Time=1.40s (247s) Lock=0.00s (0s) Rows=1.0 (177), [dubbo]@2hosts select count(*) from user_info LEFT JOIN system_region a ON province_id =a.region_id LEFT JOIN system_region b ON city_id = b.region_id LEFT JOIN system_region c ON district_id = c.region_id Count: 1 Time=1.13s (1s) Lock=0.00s (0s) Rows=10.0 (10), [dubbo]@[10.10.3.8] select return_sn, relating_order_sn, return_from, oi.order_out_sn , add_time , return_type, return_pay, ui.usename as userName, return_consignee, return_goods_count , return_total_fee, total_paid, return_desc, return_order_status, return_pay_status , return_shipping_status, order_return.lock_operator, order_return.return_invoice_no from order_return LEFT JOIN order_info oi on order_return.relating_order_sn = oi.order_sn left join user_info ui on oi.user_id = ui.user_id left join order_payment on order_payment.order_sn = oi.order_sn order by order_return.add_time DESC , oi.order_sn limit N,N Count: 8 Time=1.09s (8s) Lock=0.00s (0s) Rows=10.0 (80), [dubbo]@2hosts select return_sn, relating_order_sn, return_from, oi.order_out_sn , add_time , return_type, return_pay, ui.usename as userName, return_consignee, return_goods_count , return_total_fee, total_paid, return_desc, return_order_status, return_pay_status , return_shipping_status, order_return.lock_operator, order_return.return_invoice_no from order_return LEFT JOIN order_info oi on order_return.relating_order_sn = oi.order_sn left join user_info ui on oi.user_id = ui.user_id left join order_payment on order_payment.order_sn = oi.order_sn order by order_return.add_time DESC limit N,N Count: 1 Time=1.00s (1s) Lock=0.00s (0s) Rows=1.0 (1), root[root]@localhost select sleep(N) Died at /usr/local/mysql/bin/mysqldumpslow line 161, chunk 236.看到后面还是报错:Died at /usr/local/mysql/bin/mysqldumpslow line 161, chunk 236.
4,去看看/usr/local/mysql/bin/mysqldumpslow的第161行左右,到底是在操作什么脚本。
156 my @sorted = sort { $stmt{$b}->{$opt{s}} $stmt{$a}->{$opt{s}} } keys %stmt; 157 @sorted = @sorted[0 .. $opt{t}-1] if $opt{t}; 158 @sorted = reverse @sorted if $opt{r}; 159 160 foreach (@sorted) { 161 my $v = $stmt{$_} || die; 162 my ($c, $t,$at, $l,$al, $r,$ar) = @{ $v }{qw(c t at l al r ar)}; 163 my @users = keys %{$v->{users}}; 164 my $user = (@users==1) ? $users[0] : sprintf "%dusers",scalar @users; 165 my @hosts = keys %{$v->{hosts}}; 166 my $host = (@hosts==1) ? $hosts[0] : sprintf "%dhosts",scalar @hosts; 167 printf "Count: %d Time=%.2fs (%ds) Lock=%.2fs (%ds) Rows=%.1f (%d), $user\@$host\n%s\n\n", 168 $c, $at,$t, $al,$l, $ar,$r, $_; 169 } 170 171 sub usage { 172 my $str= shift;看到主要是foreach (@sorted)遍历函数,也就是遍历到chunk 236的时候就died结束了,没有办法往下继续foreach了。因为以前写过代码,知道报错所在的这一行
my $v = $stmt{$_} || die;是遍历第一句,那么肯定是赋值语句,报错Died,chunk 236肯定是已经遍历到末尾没有数据了,看这个函数没有判断传入的参数是否为null的逻辑,所以当文件数据已经遍历完,但是命令还没有结束,所以继续遍历,遍历null的时候报错,所以进程中止了,解决办法就是做个限制不要遍历超过原始数据的字符串长度。那么我们再来看执行的命令:
/usr/local/mysql/bin/mysqldumpslow -s at -t 15 /root/db01-102-slow.log 有 -t 15这一句,那么就是要显示出前15个记录,那么如果我的slow.log统计出来只有12个不到15个,而这里有继续遍历到15的话,那进程肯定会Died。
所以这里有2个解决方法:
1 修改/usr/local/mysql/bin/mysqldumpslow里面的源代码,加null判断。
这个过程有些复杂,暂时略过吧,期待后续空了再研究。
2 修改命令 /usr/local/mysql/bin/mysqldumpslow -s at -t 15 /root/db01-102-slow.log ,把-t 15修改成-t 10或者-t 5试试。
试了好几次,发现临界点在-t 7上面,如下:
[root@slave~]# /usr/local/mysql/bin/mysqldumpslow -s at -t 8 /root/db01-102-slow.log Reading mysql slow query log from /root/db01-102-slow.log Count: 22 Time=13.20s (290s) Lock=0.00s (0s) Rows=10.0 (220), [dubbo]@2hosts select coupon_id, coupon_lot.coupon_lot_id, coupon_lot.remark, coupon.code, coupon_lot.coupon_type, coupon.state, coupon_lot.ckey, coupon_lot.cvalue, coupon_lot.discount, coupon_lot.type, coupon_lot.channel, coupon_lot.is_reusable, coupon_lot.start_datetime, coupon_lot.end_datetime, coupon_lot.create_datetime, coupon.update_datetime ,coupon_lot.department, coupon_lot.state as couponLotState, coupon_lot.create_operator,coupon_lot.coupon_category, coupon_lot.pdt_code,brand.brand_name,product_category.category_name from coupon_lot left join coupon on coupon.coupon_lot_id = coupon_lot.coupon_lot_id LEFT JOIN brand ON brand.brand_id=coupon_lot.brand_id LEFT JOIN product_category on product_category.category_id=coupon_lot.category_id group by coupon_lot.coupon_lot_id order by coupon_lot.create_datetime DESC limit N,N Count: 22 Time=9.61s (211s) Lock=0.00s (0s) Rows=1.0 (22), [dubbo]@2hosts select count(*) from coupon_lot left join coupon on coupon.coupon_lot_id = coupon_lot.coupon_lot_id LEFT JOIN brand ON brand.brand_id=coupon_lot.brand_id LEFT JOIN product_category on product_category.category_id=coupon_lot.category_id Count: 5 Time=2.47s (12s) Lock=0.00s (0s) Rows=0.0 (0), [dubbo]@2hosts select user_id, usename, nickname, password, user_group_id, realname, gender, email, mobilephone, birthday, province_id, city_id, district_id, marry, income, remarks, create_datetime, active_state, verityEmail, verityPhone, credit, last_login, last_ip, is_locked, channel, tag, union_partner_uuid, union_user_safekey, is_black, qq, weibo_id, verity_email_key, verity_phone_key, verity_email_datetime, verity_phone_datetime, verity_question, verity_answer, cps_code, cps_time_from, cps_time_to, cps_cookie, first_channel from user_info where mobilephone = 'S' and (channel is null or trim(channel) ='S') Count: 177 Time=1.40s (247s) Lock=0.00s (0s) Rows=1.0 (177), [xx]@2hosts select count(*) from user_info LEFT JOIN system_region a ON province_id =a.region_id LEFT JOIN system_region b ON city_id = b.region_id LEFT JOIN system_region c ON district_id = c.region_id Count: 1 Time=1.13s (1s) Lock=0.00s (0s) Rows=10.0 (10), [xx]@[xxx] select return_sn, relating_order_sn, return_from, oi.order_out_sn , add_time , return_type, return_pay, ui.usename as userName, return_consignee, return_goods_count , return_total_fee, total_paid, return_desc, return_order_status, return_pay_status , return_shipping_status, order_return.lock_operator, order_return.return_invoice_no from order_return LEFT JOIN order_info oi on order_return.relating_order_sn = oi.order_sn left join user_info ui on oi.user_id = ui.user_id left join order_payment on order_payment.order_sn = oi.order_sn order by order_return.add_time DESC , oi.order_sn limit N,N Count: 8 Time=1.09s (8s) Lock=0.00s (0s) Rows=10.0 (80), [xx]@2hosts select return_sn, relating_order_sn, return_from, oi.order_out_sn , add_time , return_type, return_pay, ui.usename as userName, return_consignee, return_goods_count , return_total_fee, total_paid, return_desc, return_order_status, return_pay_status , return_shipping_status, order_return.lock_operator, order_return.return_invoice_no from order_return LEFT JOIN order_info oi on order_return.relating_order_sn = oi.order_sn left join user_info ui on oi.user_id = ui.user_id left join order_payment on order_payment.order_sn = oi.order_sn order by order_return.add_time DESC limit N,N Count: 1 Time=1.00s (1s) Lock=0.00s (0s) Rows=1.0 (1), root[root]@localhost select sleep(N) Died at /usr/local/mysql/bin/mysqldumpslow line 161, chunk 236. -- 临界点 -t 7 [root@db-master-2 ~]# /usr/local/mysql/bin/mysqldumpslow -s at -t 7 /root/db01-102-slow.log Reading mysql slow query log from /root/db01-102-slow.log Count: 22 Time=13.20s (290s) Lock=0.00s (0s) Rows=10.0 (220), [xx]@2hosts select coupon_id, coupon_lot.coupon_lot_id, coupon_lot.remark, coupon.code, coupon_lot.coupon_type, coupon.state, coupon_lot.ckey, coupon_lot.cvalue, coupon_lot.discount, coupon_lot.type, coupon_lot.channel, coupon_lot.is_reusable, coupon_lot.start_datetime, coupon_lot.end_datetime, coupon_lot.create_datetime, coupon.update_datetime ,coupon_lot.department, coupon_lot.state as couponLotState, coupon_lot.create_operator,coupon_lot.coupon_category, coupon_lot.pdt_code,brand.brand_name,product_category.category_name from coupon_lot left join coupon on coupon.coupon_lot_id = coupon_lot.coupon_lot_id LEFT JOIN brand ON brand.brand_id=coupon_lot.brand_id LEFT JOIN product_category on product_category.category_id=coupon_lot.category_id group by coupon_lot.coupon_lot_id order by coupon_lot.create_datetime DESC limit N,N Count: 22 Time=9.61s (211s) Lock=0.00s (0s) Rows=1.0 (22), [dubbo]@2hosts select count(*) from coupon_lot left join coupon on coupon.coupon_lot_id = coupon_lot.coupon_lot_id LEFT JOIN brand ON brand.brand_id=coupon_lot.brand_id LEFT JOIN product_category on product_category.category_id=coupon_lot.category_id Count: 5 Time=2.47s (12s) Lock=0.00s (0s) Rows=0.0 (0), [xx]@2hosts select user_id, usename, nickname, password, user_group_id, realname, gender, email, mobilephone, birthday, province_id, city_id, district_id, marry, income, remarks, create_datetime, active_state, verityEmail, verityPhone, credit, last_login, last_ip, is_locked, channel, tag, union_partner_uuid, union_user_safekey, is_black, qq, weibo_id, verity_email_key, verity_phone_key, verity_email_datetime, verity_phone_datetime, verity_question, verity_answer, cps_code, cps_time_from, cps_time_to, cps_cookie, first_channel from user_info where mobilephone = 'S' and (channel is null or trim(channel) ='S') Count: 177 Time=1.40s (247s) Lock=0.00s (0s) Rows=1.0 (177), [xx]@2hosts select count(*) from user_info LEFT JOIN system_region a ON province_id =a.region_id LEFT JOIN system_region b ON city_id = b.region_id LEFT JOIN system_region c ON district_id = c.region_id Count: 1 Time=1.13s (1s) Lock=0.00s (0s) Rows=10.0 (10), [dubbo]@[xxx] select return_sn, relating_order_sn, return_from, oi.order_out_sn , add_time , return_type, return_pay, ui.usename as userName, return_consignee, return_goods_count , return_total_fee, total_paid, return_desc, return_order_status, return_pay_status , return_shipping_status, order_return.lock_operator, order_return.return_invoice_no from order_return LEFT JOIN order_info oi on order_return.relating_order_sn = oi.order_sn left join user_info ui on oi.user_id = ui.user_id left join order_payment on order_payment.order_sn = oi.order_sn order by order_return.add_time DESC , oi.order_sn limit N,N Count: 8 Time=1.09s (8s) Lock=0.00s (0s) Rows=10.0 (80), [dubbo]@2hosts select return_sn, relating_order_sn, return_from, oi.order_out_sn , add_time , return_type, return_pay, ui.usename as userName, return_consignee, return_goods_count , return_total_fee, total_paid, return_desc, return_order_status, return_pay_status , return_shipping_status, order_return.lock_operator, order_return.return_invoice_no from order_return LEFT JOIN order_info oi on order_return.relating_order_sn = oi.order_sn left join user_info ui on oi.user_id = ui.user_id left join order_payment on order_payment.order_sn = oi.order_sn order by order_return.add_time DESC limit N,N Count: 1 Time=1.00s (1s) Lock=0.00s (0s) Rows=1.0 (1), root[root]@localhost select sleep(N) [root@db-master-2 ~]#
最终总结:
mysqldumpslow报错:Died at /usr/local/mysql/bin/mysqldumpslow line 161, chunk 236. 是因为top数目太多了,mysqldumpslow遍历不过来的缘故。

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MySQL函數可用於數據處理和計算。 1.基本用法包括字符串處理、日期計算和數學運算。 2.高級用法涉及結合多個函數實現複雜操作。 3.性能優化需避免在WHERE子句中使用函數,並使用GROUPBY和臨時表。

MySQL批量插入数据的高效方法包括:1.使用INSERTINTO...VALUES语法,2.利用LOADDATAINFILE命令,3.使用事务处理,4.调整批量大小,5.禁用索引,6.使用INSERTIGNORE或INSERT...ONDUPLICATEKEYUPDATE,这些方法能显著提升数据库操作效率。

在MySQL中,添加字段使用ALTERTABLEtable_nameADDCOLUMNnew_columnVARCHAR(255)AFTERexisting_column,刪除字段使用ALTERTABLEtable_nameDROPCOLUMNcolumn_to_drop。添加字段時,需指定位置以優化查詢性能和數據結構;刪除字段前需確認操作不可逆;使用在線DDL、備份數據、測試環境和低負載時間段修改表結構是性能優化和最佳實踐。


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