[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

3，在mysqldumpslow的-s后面增加 at參数试试： [root@slave ]# /usr/local/mysql/bin/mysqldumpslow -s at -t 15 /root/db01-102-slow.log

[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\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。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。