0
votes
2answers
49 views

Can CPU cores be separated for MySQL?

Is it possible to separate CPU cores in Mysql? I understand it is possible for Memory as we can tune it in innodb_buffer_pool_size or innodb_additional_mem_pool_size. How about CPU cores in ...
0
votes
0answers
19 views

MariaDB : Larger innodb_buffer_pool_size causing SQL updates to be slower

Has anyone here encountered such scenario before where and update statement took longer time to run when innodb_buffer_pool_size is bigger. I've run a few tests using the same statements on around ...
0
votes
0answers
22 views

How do I save file data to my newly mounted SSD in mysql innodb continually?

I've recently mounted a new SSD since my disk's empty space had less than 10% (mysql unbuntu linux) and this is what I did in my.cnf file to save data to my new path: innodb_buffer_pool_size=2G ...
1
vote
0answers
59 views

InnoDB: error: space object of table

131212 10:35:18 InnoDB: error: space object of table 'main/wp_m_membership_levels', InnoDB: space id 119 did not exist in memory. Retrying an open. 131212 10:35:18 InnoDB: error: space object of ...
0
votes
1answer
229 views

TCP sockets bottleneck with InnoDB/Debian?

We have a big mysql performance issue on a production environment with 18 "front" servers sending mysql queries to a unique mysql server. We are using Redis on each front server for a number of ...
0
votes
0answers
285 views

Incorrect information in .frm file after a power outage?

CentOS release 6.3 (Final) x86_64 mysql Ver 14.14 Distrib 5.5.31, for Linux (x86_64) using readline 5.1 SHOW SLAVE STATUS\G: Slave_IO_Running: Yes Slave_SQL_Running: No ...
5
votes
2answers
3k views

Cannot open table mysql/innodb_index_stats

After a fresh install of XAMPP and import from my linux live db that is working to the windows Dev-stage, I started encountering problems with INSERT. Everything else seems to work well. The errors I ...
3
votes
1answer
2k views

InnoDB log sequence number is in the future

130711 23:03:40 InnoDB: Error: page 23 log sequence number 3336825872455 InnoDB: is in the future! Current system log sequence number 235089. InnoDB: Your database may be corrupt or you may have ...
0
votes
1answer
780 views

InnoDB tables inaccessible after reboot

After reboot each time, I can't see my InnoDB table. However, when use command mode I can see my tables, but cannot access to it. mysql> show tables; +----------------------+ | ...
0
votes
0answers
253 views

How much RAM for a large database on a dedicated MySQL InnoDB server?

Hereunder my hardware config: CPU: 1x Intel Xeon X3470 Quad core @ 2.93GHz RAM: 4x 8GB DDR3 Disks: 2 x SATA 320GB for the system & 4 x SAS 300GB for the DB I've upgraded from 12Gb to 32Gb and ...
0
votes
1answer
514 views

consequences of using “innodb_flush_method = O_DIRECT” without having a battery backed write cache? or on a KVM guest?

Mysql 5.5.29 Innodb- 128GB Ram - 32 cores - Raid 10 SSD. Our server which is a dedicated KVM guest on a 'baremetal' is hosting our heavy read-write DB server. Everything is file-per-table. ...
1
vote
1answer
215 views

Set up replication and migrate to InnoDB with low downtime

Current situation is this: I have a large legacy DB using only MyISAM tables, the size of whole DB is 4GiB, one of the tables contains over 10 million rows, so it is pretty large. The database is ...
3
votes
2answers
139 views

Choosing between MyISAM & InnoDB - two servers with related tables

I don't want to make a mistake. I am about to put my website online and I admit I haven't thought about which MySQL engine to choose: MyISAM or InnoDB. I read here and there that InnoDB should be ...
3
votes
1answer
4k views

innodb_force_recovery when InnoDB corruption

When I start mysqld (in /etc/init.d), it failed with InnoDB: corruption in the InnoDB tablespace. What's the best innodb_force_recovery value to force mysqld to start? I have tried 4 and 6, but ...
4
votes
3answers
877 views

Should we need to use Barriers on a production database (MySQL/InnoDB)?

Even though we are using a journaling filesystem (EXT3) with barrier enabled, is this still safer and recommended? e.g mount -o barrier=1 /dev/sda /mntpnt Reference: ...
7
votes
4answers
7k views

Why using innodb_file_per_table?

There are many articles exaggerating (IMHO of course) the need for innodb_file_per_table. I understand that with innodb_file_per_table, there should be a better control over the individual tables; ...
1
vote
1answer
3k views

How to set a specific directory location for individual MySQL database?

Is it possible to set each database in MySQL to use a separate datadir? I'm running a userdir development (sandbox) server and would like to put the MySQL data files for the database(s) for that user ...
5
votes
5answers
5k views

MySQL said “InnoDB: Initializing buffer pool, size = 128.0M”, does it mean it is using 128MB RAM?

I am just using a very few InnoDB tables (e.g. less than 1MB), but during MySQL startup, it said InnoDB: Initializing buffer pool, size = 128.0M Does it mean even I am using in such a small size, ...