… Innodb) fits into memory. If all tables fit in Innodb buffer pool the performance for reads will be quite good however writes will still suffer because Innodb… write speed – which means 256GB buffer pool can be flushed about once per 30 minutes. It should be possible to just size Innodb logs…
Post: Effect from innodb log block size 4096 bytes
January 3, 2011 By 19 Comments
…innodb_buffer_pool_size=26G innodb_data_file_path=ibdata1:10M:autoextend innodb_file_per_table=1 innodb_flush_log_at_trx_commit=2 innodb_log_buffer…
Post: How innodb_open_files affects performance
November 18, 2009 By 4 Comments
… a bit more. So innodb_open_files does not affect performance a lot on reads – what is about writes ? I tried again very… 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: How InnoDB handles REDO logging
February 3, 2011 By 19 Comments
… using the double write buffer to ensure consistent page writes. Why log? Since InnoDB tries to keep the working set in memory (InnoDB Buffer Pool), therefore the… as we will start recovery from the last checkpoint.InnoDB achieves this by reading the LSN of the page and compares that…
Post: InnoDB vs MyISAM vs Falcon benchmarks - part 1
January 8, 2007 By 117 Comments
…_read_timeout=30 –net_write_timeout=30 –backlog=128 MyISAM / InnoDB: libexec/mysqld –no-defaults –user=root –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=30 –net_write_timeout…
Post: Tuning for heavy writing workloads
October 14, 2009 By 9 Comments
…-current) innodb_io_capacity = 4000 innodb_support_xa = false innodb_file_per_table = true innodb_buffer_pool_size = 16G innodb_read_io_threads = 8 innodb_write_io_threads = 8 innodb_flush_log_at_trx_commit = 2 innodb_log_buffer_size = 128M innodb_log_file…
Post: InnoDB Flushing: a lot of memory and slow disk
March 31, 2011 By 57 Comments
… of data, 12G innodb_buffer_pool_size, 1G innodb_log_file_size), MySQL 5.5.10 with innodb_adaptive_flushing=ON… instead of performing 1 random write, InnoDB will perform 8 random writes. I do not have a…extremely hard (read “impossible”), and this is one of the reasons why innodb_adaptive_flushing is…
Post: Tuning InnoDB Concurrency Tickets
May 24, 2010 By 5 Comments
…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: Fix of InnoDB/XtraDB scalability of rollback segment
January 18, 2009 By 9 Comments
…InnoDB scalability on 24-core box, and we made research of scalability problems in sysbench write…innodb_buffer_pool_size=6G innodb_data_file_path=ibdata1:10M:autoextend innodb_file_per_table=1 innodb_flush_log_at_trx_commit=2 innodb_log_buffer…complex –oltp-sp-name –oltp-read-only off –oltp-skip-…
Post: SHOW INNODB STATUS walk through
July 17, 2006 By 40 Comments
… innodb_flush_logs_at_trx_commit=2 log writes are done to OS cache, and being sequential writes these logs writes are pretty fast. ———————- BUFFER POOL… buffer pool, because buffer pool also stores lock information, adaptive hash indexes and some other system structures. Pending reads and writes are pending requests on buffer pool level. Innodb…
