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Update lab.md (#100) 

Fixes typos in lab content
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abe shingo 2021-04-13 15:26:23 +09:00 committed by GitHub
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courses/databases_sql/lab.md
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@ -18,7 +18,7 @@ sos $ cat custom/my.cnf
# Below, we are configuring slow query settings # Below, we are configuring slow query settings
slow_query_log=1 slow_query_log=1
slow_query_log_file=/var/log/mysqlslow.log slow_query_log_file=/var/log/mysqlslow.log
long_query_time=0.1 long_query_time=1
``` ```
@ -27,7 +27,7 @@ Start a container and enable slow query log with the following:
``` ```
sos $ docker run --name db -v custom:/etc/mysql/conf.d -e MYSQL_ROOT_PASSWORD=realsecret -d mysql:8 sos $ docker run --name db -v custom:/etc/mysql/conf.d -e MYSQL_ROOT_PASSWORD=realsecret -d mysql:8
sos $ docker cp custom/mysqld.cnf $(docker ps -qf "name=db"):/etc/mysql/conf.d/custom.cnf sos $ docker cp custom/my.cnf $(docker ps -qf "name=db"):/etc/mysql/conf.d/custom.cnf
sos $ docker restart $(docker ps -qf "name=db") sos $ docker restart $(docker ps -qf "name=db")
``` ```
@ -186,7 +186,7 @@ docker exec -it $(docker ps -qf "name=db") bash
# We have configured to log queries that take longer than 1s, # We have configured to log queries that take longer than 1s,
# so this sleep(3) will be logged # so this sleep(3) will be logged
mysql -uroot -prealsecret mysql mysql -uroot -prealsecret mysql
mysql> sleep(3); mysql> select sleep(3);
# Now, in the other terminal, tail the slow log to find details about the query # Now, in the other terminal, tail the slow log to find details about the query
root@62c92c89234d:/etc# tail -f /var/log/mysqlslow.log root@62c92c89234d:/etc# tail -f /var/log/mysqlslow.log
@ -204,4 +204,4 @@ SET timestamp=1606402428;
select sleep(3); select sleep(3);
``` ```
These were simulated examples with minimal complexity. In real life, the queries would be much more complex and the explain/analyze and slow query logs would have more details. These were simulated examples with minimal complexity. In real life, the queries would be much more complex and the explain/analyze and slow query logs would have more details.