You have a server that has very limited memory but has a very large table.
You will use mysqldump to back up this table.
Which option will ensure mysqldump will process a row at a time instead of buffering a set of rows?

You have a consistent InnoDB backup created with mysqldump, the largest table is 50 GB in size.
You start to restore your backup with this command;
shell> mysql -u root -p < backup.sql
After 30 minutes, you notice that the rate of restore seems to have slowed down. No other processes or external factors are affecting server performance.
Which is the most likely explanation for this slowdown?

You inherited a busy InnoDB OLTP Instance with 100 schemas and 100 active users per schema.
Total dataset size is 200G with an average schema size of 2G.
The data is transient and is not backed up and can be repopulated easily.
Performance and responsiveness of the DB is paramount.
The query pattern for the DB instance is split 90/10 read/write.
DB host is dedicated server with 256G RAM and 64 cores.
One of your colleagues made some recent changes to the system and users are now complaining of performance impacts.
Which four configuration file edits might your colleague have performed to cause the negative DB performance? (Choose four.)

Host slave1 has ip address 192.0.2.10.
Host slave2 has ip address 203.0.113.50
Examine these commands:

Why did this error occur?

A simple master-to-slave replication is currently being used. This information is extracted from the SHOW SLAVE STATUS output:

You execute a 'SHOW CREATE TABLE mytable" on the slave:

The table mytable on the slave contains:

You have issued a STOP SLAVE command. You have determined that it is safe to skip the transaction in this case. One or more statements are required before you can issue a START SLAVE command to resolve the duplicate key error. Which statement should be used?