mysqldumpslow报错：Died at /usr/local/mysql/bin/mysqldumpslow line 161, <> chunk 236.
总结：是由于top数目太多了。mysqldumpslow遍历只是来的缘故。
/usr/local/mysql/bin/mysqldumpslow -s -t 15 /root/db01-102-slow.log
1。把r去掉试试，还是报错，參数不识别。
[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: 没有那个文件或文件夹 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 使用參数，-s后面须要带參数的。看了西夏at比較合适
[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，究竟是在操作什么脚本。
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
%s
",
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。由于曾经写过代码，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，看这个函数没有推断传入的參数是否为null的逻辑。所以当文件数据已经遍历完，可是命令还没有结束，所以继续遍历，遍历null的时候报错，所以进程中止了。解决的方法就是做个限制不要遍历超过原始数据的字符串长度。那么我们再来看运行的命令:/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，那么假设我的slow.log统计出来仅仅有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个解决方式：
1 改动/usr/local/mysql/bin/mysqldumpslow里面的源码。加null推断。
这个过程有些复杂。临时略过吧，期待兴许空了再研究。
2 改动命令 /usr/local/mysql/bin/mysqldumpslow -s at -t 15 /root/db01-102-slow.log 。把-t 15改动成-t 10或者-t 5试试。
试了好几次，发现临界点在-t 7上面。例如以下：
[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 ~]#
终于总结：
mysqldumpslow报错：Died at /usr/local/mysql/bin/mysqldumpslow line 161, <> chunk 236. 是由于top数目太多了，mysqldumpslow遍历只是来的缘故。