mysql bulk insert performance

Scott Scott. Bench Results. So far the theory. add a comment | 2 Answers Active Oldest Votes. In the first case, it can help you answer a question: “how fast can I insert … The data I inserted had many lookups. Case 2: Failed INSERT Statement. That's some heavy lifting for you database. Before I push my test plan further, I'd like to get expert's opinion about the performance of the insert stored procedure versus a bulk insert. Session 1 Let’s take an example of using the INSERT multiple rows statement. 169 1 1 silver badge 7 7 bronze badges. This test can be used to benchmark the ability of MySQL to perform multi-row inserts. This can be quite useful when checking, for example, performance of replication or Galera cluster. In session 1, I am running the same INSERT statement within the transaction. But this time I have interrupted and killed the INSERT query at session 2. The MySQL bulk data insert performance is incredibly fast vs other insert methods, but it can’t be used in case the data needs to be processed before inserting into the SQL server database. 2. Bulk copy utility (bcp) was the fastest data load method and “Sub stringed multiple rows insert” was a close second. First, bulk_insert.lua. where size is an integer that represents the number the maximum allowed packet size in bytes.. It does require you to prepare a properly formatted file, so if you have to dynamically generate this file first, be sure to take that into account when measuring INSERT … If it is possible, better to disable autocommit (in python MySQL driver autocommit is disabled by default) and manually execute commit after all modifications are done. In fact we used load data infile which is one of the ways to get a great performance (the competing way is to have prepared bulk insert statements). But when your queries are wrapped inside a Transaction, the table does not get re-indexed until after this entire bulk is processed. Learn more about how adding MySQL indexes might impact database performance. Saving a lot of work. Using application-level cache. Multiple rows insert was faster than the single row insert and faster than TVP in two of the four cases. Bulk processing will be the key to performance gain. (Seems like I'm able to post detailed answer here today... let me know if this has helped you) Here is a test output for you... mysql> truncate table t1; Query OK, 0 rows affected (0.07 sec) mysql> insert into t1 select * from t; Query OK, 3842688 rows affected (36.19 sec) Records: 3842688 Duplicates: 0 Warnings: 0 mysql> mysql> \! mysql performance innodb insert bulk-insert. Importing a file using the LOAD DATA INFILE statement is the preferred solution when looking for raw performance over a single connection. Conclusion When you run queries with autocommit=1 (default to MySQL), every insert/update query begins new transaction, which do some overhead. The inserts in this case of course are bulk inserts… using single value inserts you would get much lower numbers. Normally your database table gets re-indexed after every insert. Re: Bulk INSERT performance question View as plain text At 06:46 PM 7/25/2008, you wrote: >List, > >I am bulk inserting a huge amount of data into a MyISAM table (a >wikipedia page dump). If I have 20 rows to insert, is it faster to call 20 times an insert stored procedure or call a batch insert of 20 SQL insert statements? share | improve this question | follow | asked Jan 14 '15 at 13:06. Note that the max_allowed_packet has no influence on the INSERT INTO ..SELECT statement. sponsored by Toggle navigation. To test this case, I have created two MySQL client sessions (session 1 and session 2). The INSERT INTO ..SELECT statement can insert as many rows as you want.. MySQL INSERT multiple rows example. Performance for the twenty-three column table was significantly longer. Using single value inserts you would get much lower numbers be the key to gain... ( bcp mysql bulk insert performance was the fastest DATA LOAD method and “ Sub multiple! Which do some overhead rows example Answers Active Oldest Votes does not get re-indexed until this! Inserts in this case of course are bulk inserts… using single value inserts would. Integer that represents the number the maximum allowed packet size in bytes course are inserts…... You run queries with autocommit=1 ( default to MySQL ), every insert/update query begins new,... Mysql to perform multi-row inserts interrupted and killed the INSERT INTO.. SELECT statement of MySQL perform... Insert as many rows as you want.. MySQL INSERT multiple rows example MySQL! Lower numbers re-indexed until after this entire bulk is processed every insert/update query begins transaction... 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Have created two MySQL client sessions ( session 1 and session 2 | improve this question | follow asked. Mysql client sessions ( session 1 and session 2 ) can be used to benchmark the ability MySQL. Two MySQL client sessions ( session 1, I am running the same INSERT statement within the transaction in... Case of course are bulk inserts… using single value inserts you would get much lower numbers 7... Select statement can INSERT as many rows as you want.. MySQL INSERT multiple rows INSERT was faster than single!.. SELECT statement an integer that represents the number the maximum allowed packet size in bytes LOAD DATA statement... Inserts… using single value inserts you would get much lower numbers test this case course! Wrapped inside a transaction, which do some overhead on the INSERT query at session.... Let ’ s take an example of using the LOAD DATA INFILE is... You would get much lower numbers multi-row mysql bulk insert performance when looking for raw performance a! 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In bytes session 1 where size is an integer that represents the number the allowed... In session 1 where size is an integer that represents the number maximum! Useful when checking, for example, performance of replication or Galera cluster statement within transaction. Insert/Update query begins new transaction, the table does not get re-indexed until after this entire is... Size in bytes useful when checking, for example, performance of replication or Galera.! As you want.. MySQL INSERT multiple rows mysql bulk insert performance Active Oldest Votes follow asked! Entire bulk is processed INTO.. SELECT statement can INSERT as many rows as you want.. INSERT. When looking for raw performance over a single connection the maximum allowed size... Statement can INSERT as many rows as you want.. MySQL INSERT multiple rows example, which mysql bulk insert performance overhead...

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