0
votes
1answer
56 views

Does having a big table that I do not query cause the whole DB to be slower?

I have a log table that I use for logging files sent to clients. I'm not querying that table, just use it for logging (INSERT) and when I need to check when something was sent to clients, usually once ...
1
vote
1answer
56 views

How to export a MySQLtable with a longBLOB column to an Oracle database?

In MySQL I have a table: Select * from Dummy; Columns like below: id name salary binary_col 1 a 100 A.pdf 2 b 200 b.pdf 3 c 300 c.pdf 4 d 400 d.pdf 5 e 500 e.pdf ...
0
votes
2answers
44 views

MySQL Index for searching for NULL values in text fields

I need to do the simple query SELECT id FROM table WHERE blob_field IS NULL. blob_field is a longblob. If I create an index on blob_field with prefix length 1, will this be sufficient to use for ...
0
votes
3answers
49 views

Should frequently accessed tables containing large blobs with one-to-one relationships be normalized and columns split into two tables?

I have a frequently accessed table containing 3 columns of blobs, and 4 columns of extra data that is not used in the query, but just sent as result to PHP. There are 6 small columns (big int, small ...
1
vote
2answers
386 views

MySQL stores BLOB in innodb buffer pool (innodb_buffer_pool_size)?

I have several databases all in INNODB, 50GB are BLOB columns, only 700MB are not BLOB data. Tools as mysqltuner ask me to set innodb_buffer_pool_size = 51GB. Does MySQL store the BLOB in RAM? If ...
1
vote
1answer
100 views

Saving LZW encoded data into a mySQL database

I send LZW compressed data from the client side with JavaScript to the server. The problem is that the data becomes corrupted after saving it to database. So my question is, what collation should I ...
0
votes
0answers
28 views

Reliability of blobs in MySQL

I'm in the process of migrating an application working with Oracle to MySQL. That application stores data in the form of blobs, which can be pretty big. The Oracle production database is 60 Gb large ...
3
votes
1answer
203 views

Can I use mysql to serve 100's of millions of small image files?

I need to serve 300,000,000 small image files totaling 1.5TB. Trying to unpack these files to individual files on the file system is next to impossible (1 MByte/sec throughput rates to create the ...
1
vote
1answer
264 views

Which Database to choose: MySQL or Oracle

I have an application generating time series data (32 channels, 22KHz, 6 secs) once a minute. These have to be stored in a database. At the moment I'm using MySQL with InnoDB tables ...
1
vote
1answer
312 views

What is the underlying representation of BLOB data when I export it?

When I export a blob object to an SQL file, I get some thing like this for a blob field: 0x4f3a383a227374644....., Questions I would like to know how the BLOB is actually converted to the above ...
2
votes
1answer
374 views

Data type for protobuf objects in mysql

I would like to store some protobuf objects in a MySQL database. The objects are created in a Java application. The object is accompanied with a textual type identifier and a timestamp. ...