Tagged Questions
0
votes
1answer
41 views
Misunderstanding statement in MySQL documentation
I can't understand this statement in Optimizing Data Size:
Declare columns with identical information in different tables with
identical data types, to speed up joins based on the corresponding
...
1
vote
2answers
76 views
Database and query optimizacion
I have a database containing three tables: tbl_database (main table is the primary), tbl_cmdatabase and tbl_blacklist. The three tables share the same structure but differ in the number of records ...
0
votes
3answers
222 views
Mysql optimization help
I've tried optimizing mysql as good as I could, but apparently I'm not to good at it :-)
So I come to you guys for help.
Server specs are:
AMD Opteron CPU 8 cores
16 GB RAM
2x2.000 GB HDD 7.200 RPM ...
0
votes
1answer
756 views
Mysql 5.5: Optimizing all tables with mysqlcheck - is it useful to run the -check option along with -optimize?
I plan on running 'mysqlcheck --optimize --all-databases' to clear up some fragmentation.
Would it be useful to run -check with this option or does the -optimize already take care of that?
I am only ...
2
votes
3answers
454 views
MySQL optimization - year column grouping - using temporary table, filesort
I have a transactions table which is having 600,000 records, I need to list the count for the dashboard on financial year basis. The table used is MyISAM. I tried adding index for the transaction date ...
1
vote
2answers
104 views
Is there a way to get slow-query-log-like profiling information on a single query?
Specifically, I'm looking for this information:
# Query_time: 0.011922 Lock_time: 0.000088 Rows_sent: 107 Rows_examined: 663 Rows_affected: 0 Rows_read: 107
# Bytes_sent: 4152 Tmp_tables: 3 ...
2
votes
2answers
1k views
How to improve MySQL Server Performance..??
As a MySQL DBA most of the times we are supposed to optimize a poorly performing MySQL Servers.
Now my question is where to start from like we will need to find out many things as
1.Find the ...
5
votes
2answers
1k views
Insert-heavy InnoDB table won't use all my CPU
I have a packet log database, which is almost never queried. It just needs to be fast on inserts. I'm using InnoDB because I'd like to maintain ACID compliance, since even losing a single packet could ...
6
votes
2answers
789 views
How do Application Like Yelp Retrieve distance information from data base efficiently
For example, say I have a table:
Business(BusinessID, Lattitude, Longitude)
All are indexed of course. Also there are 1 million records
Say I want to find businesses closest to 106,5, for example, ...
