… those updated (dirty) buffer pool pages are flushed down the to the tablespace. If Innodb stops (read: crashes) with dirty buffer pool pages, Innodb recovery must be… to optimize the Checkpoint age, it is flushing to try to optimize IO and to obey the LRU in the buffer pool. Since buffers can…
Post: The relationship between Innodb Log checkpointing and dirty Buffer pool pages
February 17, 2012 By 10 Comments
Post: Heikki Tuuri answers to Innodb questions, Part II
November 4, 2007 By 13 Comments
…page read requests per a readahead. The InnoDB buffer is 256 page read requests for the aio read thread….this this matter the other day – choosing innodb_buffer_pool_size Q36: There have been several … fragmentation, without having to run the OPTIMIZE? HT: Since OPTIMIZE rebuilds the whole table, it …
Post: MySQL 5.6 vs MySQL 5.5 and the Star Schema Benchmark
March 11, 2013 By 7 Comments
…INNODB_BUFFER_POOL_READ_AHEAD_RND | 0 | | INNODB_BUFFER_POOL_READ_AHEAD | 38392 | | INNODB_BUFFER_POOL_READ_AHEAD_EVICTED | 0 | | INNODB_BUFFER_POOL_READ_REQUESTS | 6731100 | | INNODB_BUFFER_POOL_READS | 570 | | INNODB_DATA_PENDING_READS | 0 | | INNODB_DATA_READ | 640536576 | | INNODB_DATA_READS…
Post: Is there room for more MySQL IO Optimization?
January 3, 2013 By 11 Comments
… innodb_buffer_pool … not optimized for…Innodb_data_reads | 54561 | | Innodb_data_reads | 38277 | | Innodb_data_reads | 25895 | | Innodb_data_reads | 31363 | | Innodb_data_reads | 170816 | | Innodb_data_reads | 207432 | | Innodb_data_reads | 156896 | | Innodb_data_reads | 19059 | | Innodb_data_reads…
Post: Innodb Performance Optimization Basics
November 1, 2007 By 75 Comments
…optimization. I call this Innodb Performance Optimization Basics so these are general guidelines which work well for wide range of applications, though the optimal… detailed guide on tuning innodb buffer pool innodb_log_file_size – …be default as transaction-isolation=READ-COMMITTED. This option has…
Post: InnoDB vs MyISAM vs Falcon benchmarks - part 1
January 8, 2007 By 117 Comments
… –key-buffer-size=1500M –innodb-buffer-pool-size=1500M –innodb-log-file-size=100M –innodb-thread-concurrency=8 –max-connections=1500 –table-cache=512 –net_read_timeout… scales pretty bad and there is a big room for optimization. READ_PK_RANGE Query: SELECT min(dob) FROM $tableName WHERE id…
Post: How innodb_open_files affects performance
November 18, 2009 By 4 Comments
… should be as good as it gets in terms of optimizations in this space. To keep test alligned to my previous… dirty pages in innodb buffer pool which had to be flushed before recycling. First ran however was done with clean buffer pool (after reading all tables once) Same as with select case I could not see any measurable difference between two tested innodb…
Post: Read Buffers, mmap, malloc and MySQL Performance
September 12, 2007 By 8 Comments
… use large pages. These already can be used for Innodb Buffer Pool and Key Buffer but could be used for other large allocations. Finally… read buffers in the pool you could just grab one having allocation very quick. Also MySQL should get smarter in terms of which buffer size should be used, even for sake of speeding up the reads and more optimal resource allocation – if…
Post: Tuning InnoDB Concurrency Tickets
May 24, 2010 By 5 Comments
…optimization effort, you will want to optimize…innodb_buffer_pool_size=24G innodb_data_file_path=ibdata1:10M:autoextend innodb_file_per_table=1 innodb_flush_log_at_trx_commit = 1 innodb_log_buffer…
Post: What MySQL buffer cache hit rate should you target
June 29, 2006 By 5 Comments
… is good for optimal MySQL Performance” is typical question I’m asked. It could by MyISAM key_buffer or Innodb innodb_buffer_pool it does not… file reads“, “OS file writes” from SHOW INNODB STATUS for Innodb tables. In MySQL 5.0+ you can also use Innodb_data_reads, and Innodb_data…
