1
vote
1answer
38 views

Shut Down MySQL during InnoDB rollback after crash

I am puzzled once again. We had a server crash last night during some huge queries. Upon restart in the morning MySQL went into recovery mode. I needed to shut down the MySQL service and it is ...
2
votes
1answer
42 views

What is the best storing device for DB transaction log?

I'm using MySQL with InnoDB storing engine. Transactional log is placed to dedicated HDD. Still as it is HDD atopsar shows big load (>50%) to this HDD because of big amount of small IOs (about 50 ...
0
votes
1answer
31 views

MySQL InnoDB log files on different location

I am using MySQL version: 5.5.38 There are following parameters that can control InnoDB log files: innodb_log_files_in_group - amount of log files in the group, by default 2. Will create 2 files ...
0
votes
0answers
39 views

Too much IO to MySQL InnoDB log files

I am using MySQL version: 5.5.38 I have dedicated HDD to InnoDB log files using innodb-log-group-home-dir option. atopsar -d 30 shows big load (>50%) to this HDD The thing is that I have only 75 ...
2
votes
1answer
92 views

What is the differnent between transaction log and redo log in MySQL

I have read about MySQL. In my opinion, I see two log type is very similar. MySQL save how and when data is changed in log. Information is used for recovery of MySQL. I am confusing the function of ...
5
votes
1answer
3k views

Whats the difference between Transaction logs and Binary logs?

Coming from a SQL Server shop, I now work with MySQL and I was curious. What are the differences between MySQL's binary log and MSSQL's transaction log? By the outlook thus far, it seems that there ...