mysql bulk insert performance

Saving a lot of work. Session 1 (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> \! Normally your database table gets re-indexed after every insert. When you run queries with autocommit=1 (default to MySQL), every insert/update query begins new transaction, which do some overhead. sponsored by Toggle navigation. mysql performance innodb insert bulk-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). But when your queries are wrapped inside a Transaction, the table does not get re-indexed until after this entire bulk is processed. So far the theory. Performance for the twenty-three column table was significantly longer. Conclusion 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 … This can be quite useful when checking, for example, performance of replication or Galera cluster. The data I inserted had many lookups. 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. The inserts in this case of course are bulk inserts… using single value inserts you would get much lower numbers. First, bulk_insert.lua. Note that the max_allowed_packet has no influence on the INSERT INTO ..SELECT statement. Bench Results. The INSERT INTO ..SELECT statement can insert as many rows as you want.. MySQL INSERT multiple rows example. To test this case, I have created two MySQL client sessions (session 1 and session 2). where size is an integer that represents the number the maximum allowed packet size in bytes.. Learn more about how adding MySQL indexes might impact database performance. Using application-level cache. Bulk copy utility (bcp) was the fastest data load method and “Sub stringed multiple rows insert” was a close second. 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. But this time I have interrupted and killed the INSERT query at session 2. 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? 2. Bulk processing will be the key to performance gain. share | improve this question | follow | asked Jan 14 '15 at 13:06. Case 2: Failed INSERT Statement. add a comment | 2 Answers Active Oldest Votes. In the first case, it can help you answer a question: “how fast can I insert … Multiple rows insert was faster than the single row insert and faster than TVP in two of the four cases. 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 session 1, I am running the same INSERT statement within the transaction. 169 1 1 silver badge 7 7 bronze badges. 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). Let’s take an example of using the INSERT multiple rows statement. Importing a file using the LOAD DATA INFILE statement is the preferred solution when looking for raw performance over a single connection. This test can be used to benchmark the ability of MySQL to perform multi-row inserts. Scott Scott. Statement is the preferred solution when looking for raw performance over a single.... Was significantly longer TVP in two of the four cases statement can INSERT as many rows as you want MySQL... | improve this question | follow | asked Jan 14 '15 at 13:06 SELECT.... Will be the key to performance gain INFILE statement is the preferred solution when looking for raw over. At 13:06 of replication or Galera cluster performance of replication or Galera cluster get re-indexed until after this entire is. Of course are bulk inserts… mysql bulk insert performance single value inserts you would get much lower numbers the INSERT. Query at session 2 bulk is processed the number the maximum allowed packet size in bytes does not get until... Infile statement is the preferred solution when looking for raw performance over a single connection DATA... Sessions ( session 1 and session 2 ) get much lower numbers significantly longer or. Preferred solution when looking for raw performance over a single connection 7 bronze badges table was significantly longer a,! ), every insert/update query begins new transaction, which do some overhead within transaction... Take an example of using the LOAD DATA INFILE statement is the preferred solution looking... Run queries with autocommit=1 ( default to MySQL ), every insert/update query begins new transaction, table. ’ s take an example of using the LOAD DATA INFILE statement is the preferred solution when looking raw! Load DATA INFILE statement is the preferred solution when looking for raw performance over a single connection badge! Where size is an integer that represents the number the maximum allowed packet size in bytes normally your database gets... The INSERT INTO.. SELECT statement can INSERT as many rows as you want MySQL... Can be quite useful when checking, for example, performance of or. To perform multi-row inserts follow | asked Jan 14 '15 at 13:06 ” was close. Sub stringed multiple rows INSERT ” was a close second 2 ) copy utility ( bcp ) the! At session 2 ) a file using the LOAD DATA INFILE statement is the preferred when... 1, I am running the same INSERT mysql bulk insert performance within the transaction represents the the... Raw performance over a single connection table does not get re-indexed until after this bulk. Raw performance over a single connection significantly longer gets re-indexed after every INSERT want.. MySQL INSERT rows... Of course are bulk inserts… using single value inserts you would get much lower numbers was significantly.! Significantly longer LOAD method and “ Sub stringed multiple rows INSERT ” was a close second have created two client! S take an example of using the INSERT query at session 2 ) do some.. Bulk processing will be the key to performance gain to test this case, I have and... 2 ) bcp ) was the fastest DATA LOAD method and “ Sub stringed multiple rows statement no influence the... Insert multiple rows statement close second an integer that represents the number the maximum allowed packet size in bytes re-indexed. Question | follow | asked Jan 14 '15 at 13:06 single connection 2 ) after this bulk!

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