0
votes
1answer
24 views

How does subpartitioning actually work and what physical files are created?

I can't understand how the subpartitioning works in mysql. I am reading the following example: create table invoices ( customer_id int not null, product_id int not null, amount decimal ...
1
vote
1answer
30 views

MySQL 5.6.17 running out of memory when opening table with many partitions

We are currently setting up a MySQL database (version 5.6.17) on an Amazon db.m1.large RDS instance for storing time series data. Each time series property of an object is stored in a separate InnoDB ...
0
votes
0answers
24 views

How do triggers work on partitioned tables?

I have partitioned a table on the basis of a column. This column can either have 0 or 1. So, only two partitions (p0, p1) have been created internally. On this table there are 3 triggers which execute ...
0
votes
0answers
39 views

Copying a table with its structure, indexes, and associated triggers?

I have studied this post on Stack Overflow: Fastest way to copy a table in MySQL. But no answer is copying everything like the table's structure, data, indexes as well as associated triggers. Is it ...
3
votes
2answers
62 views

mysql - is it possible to create a partition expression based on two keys / indexes?

if i have a table with, lets say 500 million rows, and among others there are two main individual indexes on that table. the table looks like: CREATE TABLE `t1` ( id_1 bigint unsigned not null, ...
2
votes
1answer
28 views

Is there a difference between RANGE and LIST method for partitioning by consecutive integer values?

I have a table with a year column that has consecutive values -- 2000, 2001, and so on. It's a read-heavy MyISAM table, with 25+ million rows for every value of year and a comparable set inserted in ...
0
votes
3answers
43 views

Redesign basic Mysql storage architecture

We are a small Internet provider and we are storing all our clients traffic data in a MySQL database (MyISAM). We insert data every few minutes in three tables like this: capture_table ---------- ...
0
votes
1answer
27 views

Want to create partitions of a MySQL table and change the charset of new partitions

I have a database table which contains large amount of data. I have written a script to create new partitions every week and drop old partitions (which are of no use). Currently, I have a column in ...
0
votes
0answers
26 views

Sharding TPC-C Benchmark with MySQL Fabric

Currently I have a setup of 5 mysql database nodes (db01 ~ db05). MySQL Fabric and backstore have been installed and running in db01. I configured one global_group (i.e. group_02) with db02 and three ...
0
votes
0answers
17 views

Modulus calculation for compound primary keys in MySQL Cluster (and other sharded databases)

In MySQL Cluster, and generally in sharded databases, how is a compound primary key's modulus calculated? Say, for example, there are two tables that have primary keys like so: CREATE TABLE Orders ...
0
votes
1answer
31 views

MySQL 5.1: How to rollback partitioned table

I have partitioned a table on the basis of one flag column have value either 0 or 1. Now, I want to roll back these tables. How can I do this?
0
votes
1answer
493 views

Partition by year and sub-partition by month mysql

I have a database with a date column having datatype as date. I am using mysql 5.6 The table is expected to have 10k rows each day. I want to create partition on the table on year range and then sub ...
3
votes
1answer
127 views

Partitioning large mysql table

I have a large (40GB) table I would like to partition. The rows are essentially write once read many. Currently I am using mysql 5.5 innodb with file_per_table. It's tough to optimize this table since ...
0
votes
0answers
38 views

MySQL 5.6 TO_DAYS partitioning schema always searching in first partition for queries which include <,> or BETWEEN operators in where clause

I have this table definition: CREATE TABLE ClientInfo ( IPAddr VARCHAR(16), RepDate DATETIME NOT NULL )ENGINE=MyISAM; PARTITION BY RANGE(TO_DAYS(RepDate)) (PARTITION pNULL VALUES LESS THAN ...
0
votes
1answer
30 views

How does partitioning and the lack of a primary key affect ON DUPLICATE KEY UPDATE

Consider a table with the following columns: phone BIGINT NOT NULL PRIMARY KEY, name VARCHAR(64), state VARCHAR(64) We would like to partition the table on state, however that would require ...
0
votes
1answer
109 views

Is searching an alternate index on a partitioned myISAM table concurrent or serial?

I have a myISAM table with 30 partitions. The primary key is a SHA1 hash value, which is also used in the partition selection function. I also have an alternate key - an autoincrement integer. Since ...
2
votes
1answer
415 views

Partitioning MySQL vs PostgreSQL

For our new system we are looking for database server. We considered a lot of pros/cons for MySQL(InnoDB) vs PostgreSQL and the breaking point for us is partitioning. We will choose the one which ...
0
votes
0answers
70 views

MySQL: Optimizing for large but discrete data sets

In brief: I'm developing a database that handles GTFS datasets from multiple transit agencies. Each dataset contains millions of rows in the stop_times.txt file (and thus its corresponding table). ...
0
votes
0answers
44 views

How to move partitions between filesystems

We have ~9TB MySQL database which consists from a few tables which are partitioned by day. Sum of daily information is ~20GB. Database is practically write only. There are at most tens of queries ...
1
vote
1answer
82 views

Mysql, sql server, oracle tables get too large [closed]

I hear a lot about things that, it is a lot cheaper to buy new harddisk than pay staff to come up with genius ideas how to save resources. But what I don't understand, is how these databases handle a ...
1
vote
3answers
2k views

How to partition a table by timestamp, where data from every i'th day goes to partition i?

I'm looking into partitioning a table in my InnoDB database. I have a column corresponding to a UTC timestamp, and I want to partition around that. The basic idea that I want to capture is a ...
0
votes
0answers
343 views

Should I partition this large MySQL InnoDB table by date and if so, how?

Table Detail: I have a fairly large (4.6 million rows, 74 columns (average data length is 239)) InnoDB table which stores data for about 1100 sensors polled every 10 minutes (about 150k rows inserted ...
1
vote
0answers
22 views

How do I configure MySQL to store specific entire InnoDB tables on a different drive in Windows ( Server )?

After skimming the MySQL ( 5.5 ) docs on Partitioning, that seems to deal with breaking parts of the same table off onto other drives. I'm struggling to find information on how I pinpoint an ...
3
votes
1answer
163 views

What's the optimal server configuration for fastest inserting in a MySql database in this scenario?

I have a MyISAM table partitioned by range with 90 partitions representing the last 90 days. I expect this table to receive somewhere between 500 million to 1 billion records before i start rotating ...
2
votes
1answer
226 views

InnoDB, Hash Table, Reference Table and Fragmentation

I have a big list of domains and URLs that I store in a database, there are around 150M domains and 300M URLs, I'm using InnoDB to store each in the format: CREATE TABLE IF NOT EXISTS `domains_list` ...
2
votes
1answer
255 views

Does partitioning a MySQL table also increase index creation performance?

This is something I was wondering since I'm planning to partition a aggregation table with 10 mil records where rebuilding indexes cause table locks for some time. Because partitions are bluntly put ...
1
vote
3answers
1k views

How do I remove partitioning?

There is a table my_table which has not been created any partition in MySQL 5.6. And I'm trying to create partitions by procedure in my_table, when I run this code: alter table my_table remove ...
0
votes
1answer
95 views

Is there an advantage to moving to 'real' date partitions on MySQL 5.5?

We are using partitions per day for some our tables. We started with MySQL 5.1, so we had to partition using the to_days (end_time is a datetime column): ENGINE=InnoDB DEFAULT CHARSET=utf8 ...
0
votes
0answers
68 views

Find the partition where data lives in MySQL

Is there a way to select the partition name where a specified record actually lives in? The idea is something like: SELECT <PARTITION_NAME> FROM mytable WHERE <where_condition> I found ...
2
votes
0answers
81 views

MySQL Partitioning Performance

I have a MyISAM table with billions of rows that is still causing me problems because the indexes, even after I shortened them as much as possible, do not fit in my 64GB of RAM. I am unable to index ...
4
votes
2answers
1k views

Partitioning and freeing disk space

I am running MySql innodb with innodb_file_per_table. As a daily script, I would like to create a new partition for a set of tables, as well as delete yesterday's partitions. What command would need ...
2
votes
1answer
619 views

Why is MySQL order by performance poor within a single partition of a partitioned table?

I have to store some sequence numbered data in MySQL. I have about 300,000 data items per day for about a 10 year span. Let's say the table structure is just sequence number (a big int) and data (a ...
0
votes
1answer
412 views

Are there any disadvantages to partitioning on financial year?

Our current set up has one table per financial year (May 1- April 30). Each table has approx 1.5 million rows. We have about 8 years of data, and will obviously be adding each year. The majority of ...
0
votes
1answer
345 views

MySQL Read Speed and Partitioning on Separate Drives

Introduction Simple project but for an heavy read load -90% reads- over a table(~20Milion Rows ever-growing where I have to boost performance and ensure response low time for read queries) that was ...
1
vote
1answer
114 views

Archive partition before delete it?

I have manage to create an event and with the following scripts could both create and delete the partition. The issue now I need help on how to save the partition before its deleted? Should I use ...
0
votes
1answer
98 views

Add partition works but not the drop partition

We have set an event as below. What we notice is that the add partition is working well as we can see on a daily basis the partition list is growing but the drop partition is not working well any ...
1
vote
0answers
81 views

MySQL Partitions

I've done a lot of work with MySQL but generally on a much smaller scale than this, so please excuse my ignorance. We've got an InnoDB table which is currently storing ~3.5 million rows, which I know ...
1
vote
3answers
5k views

Avoiding “Waiting for table metadata lock” when `ALTER TABLE DROP PARTITION`?

I have some tables that many users need to access to: mysql> show create table v3_cam_date\G *************************** 1. row *************************** Table: v3_cam_date Create Table: ...
3
votes
1answer
184 views

MySQL partitioned tables?

I have a database that supports a web application with several large tables. I'm wondering if partitioned tables will help speed up certain queries. Each of these tables has a colum called ...
0
votes
2answers
163 views

MySQL Cluster - partitions on disk

I have question about MySQL Cluster: Is it possible to have database larger than amount of RAM? (to not have all cluster data in-memory, but some data will reside on clusters nodes hard disks) ...
1
vote
2answers
949 views

Best option to back up mysql innodb partition

We have a number of tables which we plan to partition based on months. The issue now before we can drop those partition we would like to perform backup. One option we found is this link ...
0
votes
1answer
187 views

Where is my old partition in mysql show create table?

I am keep adding daily base partition for a table as e.g. ALTER TABLE tblData PARTITION BY RANGE (to_days(`dataInsertDateTime`)) ( PARTITION p20 VALUES LESS THAN (to_days('2012-12-25')), PARTITION ...
0
votes
2answers
204 views

Best Way to Partition By City / State in MySQL 5.5

I have a table with ~20M rows and every query against it will include state or city or a combination so I was thinking of partitioning the table using a combo of the two fields like so: ALTER TABLE ...
2
votes
0answers
248 views

Dynamic MySQL partitioning based on UnixTime

My DB design includes multiple MYISAM tables with measurements collected online, Each row record contains auto-incremented id, some data and an integer representing unixtime. I am designing an aging ...
1
vote
0answers
132 views

MySQL Partitioning, Reorganize Max Value partition (Known Bug / Feature)

I have written a crone job which reorganizes last max value partition every week into 2 new partitions , one for the previous week , and one for the future data (new max value partition which ...
1
vote
2answers
1k views

Best way to organize compound indexes on partitioned table (date by range)?

I have a table with an auto increment primary key, but in order to use the partition feature in MySQL I had to include the date in the primary key so I would use partition by range using the date ...
0
votes
0answers
52 views

How to check on my partitions?

I am a newbie into partition. First I have a table with auto increment with its primary key and many other fields. I wanted to partition based on dataInsertDateTime column. It have me error so I had ...
2
votes
1answer
212 views

Where are partitions defined in mysql

I have a large table that I want to spread across multiple disks/LUNs. It will contain blobs and I want to have it separated out from the other data. How do I go from new disks (lets call them ...
1
vote
1answer
169 views

Is there a way to write intelligent queries against a merge table in MySQL that represents a bunch of tables partitioned by date?

I have a set of MySQL tables that are partitioned by date, with a merge table representing all of them. For the query I am writing, the results are joined by date, so rows in table A_2012-12-05 will ...
3
votes
3answers
469 views

High insert rate on MySQL

I have a project at the moment that is close to be finished. I have been asked (at the very end) to log a specific event. The event will occur very often (easily a few times each 5sec). Each event ...