Dear Community,
Starting this release we introduce new release model of Percona Server. We will have Stable and Release Candidate releases. Release Candidates introduce new features not available in stable releases.
Our new 5.1.49-12.0 RC along with new features contains couple patches from Facebook-MySQL tree https://launchpad.net/mysqlatfacebook , especially worth to note
better integration with FlashCache.
We also introduce the very interesting new feature (sponsored by Well Known Social Network site) “Permanent InnoDB Buffer Pool” which allows to keep InnoDB buffer pool in memory between restarts of MySQL servers.
It allows to significantly increase warmup time after MySQL restarts.
Starting this release we also provide special builds optimized for Cisco UCS B250/C250 servers, which comes with a lot of
memory ( up to 384GB ) and “Permanent InnoDB Buffer Pool” is especially interesting for servers with 128GB+ memory sizes, as it may take hours to warm empty InnoDB buffer pool on these boxes.
Percona Server version 5.1.49-rel12.0 RC is available for download now.
The changes in this release include:
New features
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Percona Server 5.1.49-rel12.0 is based on MySQL 5.1.49.
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New features added:
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error_pad – Implements error code compatibilities with MySQL 5.5. (Oleg Tsarev)
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query_cache_totally_disable – Allows the user to disable use of the query cache. (Oleg Tsarev, backport from MySQL 5.5)
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show_engines – Changes
SHOW STORAGE ENGINESto report XtraDB when appropriate. (Oleg Tsarev) -
remove_fcntl_excessive_calls Bug #606810 – Removes excessive fcntl calls. (Oleg Tsarev, ported from Facebook tree)
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sql_no_fcache – Prevents blocks of data from being cached to FlashCache during a query. (Oleg Tsarev, ported from FaceBook tree)
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status_wait_query_cache_mutex – Provides a new thread state – “Waiting on query cache mutex”. (Oleg Tsarev)
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log_connection_error – Issues the warning “Too many connection” if log_warnings is enabled. (Oleg Tsarev)
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innodb_buffer_pool_shm_key – Allows storing the buffer pool in a shared memory segment between restarts of the server. (Yasufumi Kinoshita)
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Option syslog was added to the mysql server. If enabled, all commands run on the server are logged to syslog. (Oleg Tsarev)
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New variables introduced:
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innodb_flush_log_at_trx_commit_session – Implements a session-level version of the MySQL global system variable
innodb_flush_log_at_trx_commit. (Yasufumi Kinoshita) -
innodb_fast_index_creation – Allows disabling of fast index creation. (Yasufumi Kinoshita)
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innodb_use_sys_stats_table – If ON, the table’s statistics are stored statically in the internal table SYS_STATS. The table is populated with the ANALYZE TABLE command. (Yasufumi Kinoshita)
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Fixed bugs
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Bug #576041 – Fixes long stalls while accessing the innodb_buffer_pool_pages_index table on systems with a large number of tables.
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Bug #592007 – More strictly enforces the maximum purge delay defined by innodb_max_purge_lag by removing the requirement that purge operations be delayed if an old consistent read view exists that could see the rows to be purged.
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Bug #607449 – Fixes a crash during shutdown when userstat_running=1.
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Bug #612954 – Fixes a problem with SHOW PROCESSLIST displaying an incorrect time.
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Bug #610525 – Reduces the number of compile time errors when the server is rebuilt.
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Bug #569275 – Fixes a crash when XtraDB shuts down in “crash resistent mode”.
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Bug #589484 – Adds reporting of the query cache mutex status in SHOW PROCESSLIST.
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Bug #606965 – Allows preventing data caching to flash storage during a query.
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Bug #609027 – Allows query cache use to be completely disabled
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Bug #600352 – Fixes SHOW STORAGE ENGINES to correctly report “Percona-XtraDB” rather than “InnoDB”
The binary packages are available on our website.
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Release Notes to this and previous releases can be found in our Wiki.
The latest source code of Percona Server, including development branch you can find on LaunchPAD.
Please report any bugs found on Bugs in Percona Server.
For general questions use our Pecona-discussions group, and for development question Percona-dev group.
For support, commercial and sponsorship inquiries contact Percona
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Entry posted by Aleksandr Kuzminsky | No comment
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