June 19, 2013

Post: Percona Server 5.1.69-14.7 now available: A drop in replacement for MySQL

…. Missing path separator between the directory and file name components in a bitmap file name could stop the server starting if the innodb_data_home… now returned if a bitmap file I/O error occurs after an INNODB_CHANGED_PAGES query started returning data to indicate an incomplete result…

Post: Percona Server 5.6.11-60.3 first Release Candidate now available

…. Missing path separator between the directory and file name components in a bitmap file name could stop the server starting if the innodb_data_home_dir variable didn’t have the path separator at the end. Bug fixed #1181887. Changed page tracking used…

Post: Virident vCache vs. FlashCache: Part 2

innodb options innodb_file_format = barracuda innodb_buffer_pool_size = 4G innodb_file_per_table = true innodb_data_file_path = ibdata1:100M innodb_flush_method = O_DIRECT innodb_log_buffer_size = 128M innodb

Post: Percona XtraBackup 2.0.7 for MySQL available for download

… fixed #1166888. Package dependency has been changed from abstract mysql to real /usr/bin/mysql file, because rpm packages from Oracle no… as well. Bug fixed #1169509. innobackupex wasn’t handling the innodb_data_file_path option which could cause backup to fail. Bug fixed #1169726…

Post: Tuning InnoDB Concurrency Tickets

… OK, 1 row affected (0.00 sec) Rows matched: 1 Changed: 1 Warnings: 0 mysql> ALTER TABLE test_table ADD INDEX…: 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_size = 8M innodb_log_files_in_group=2 innodb

Post: Effect from innodb log block size 4096 bytes

… its own block size.. – Of course the things may change if “innodb_flush_log_at_trx_commit=1″ will be used, but… 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_size=8M innodb_log_files_in_group=2 innodb

Comment: Database problems in MySQL/PHP Applications

…the slave will create a master.info file, and any later # change in this file to the variables’ values below will be… InnoDB tables #innodb_data_home_dir = /usr/local/mysql/data/ #innodb_data_file_path = ibdata1:2000M;ibdata2:10M:autoextend #innodb_log_group_home_dir = /usr/local/mysql/data/ #innodb_…

Post: MySQL 5.5 and MySQL 5.6 default variable values differences

….10 | | INNODB_CONCURRENCY_TICKETS | 500 | 5000 | | INNODB_PURGE_THREADS | 0 | 1 | | INNODB_OPEN_FILES | 300 | 2000 | | INNODB_DATA_FILE_PATH | ibdata1:10M:autoextend | ibdata1:12M:autoextend | | INNODB_PURGE_BATCH… unless opening and closing files is expensive operation (such as using MySQL on NFS file system). innodb_data_file_path got a small change with starting ibdata1…

Post: Ultimate MySQL variable and status reference list

….commanual innodb_change_bufferingblogpercona.commanual innodb_checksumsblogpercona.commanual innodb_commit_concurrencyblogpercona.commanual innodb_concurrency_ticketsblogpercona.commanual innodb_data_file_pathblogpercona.commanual Innodb_data_fsyncsblogpercona.commanual innodb_data_home…

Comment: MySQL Server Memory Usage

innodb_data_home_dir=/db/disk2/data innodb_data_file_path=ibdata1:10240M;ibdata2:10240M;ibdata3:10240M;ibdata4:10240M;ibdata5:10M:autoextend innodb_log…innodb_file_io_threads=4 innodb_lock_wait_timeout=15 # CHANGED from 50 innodb_log_files_in_group=3 innodb_flush_log_at_trx_commit=0 #innodb_log_file