v2.2.6 released 2013-12-18
* Added pt-query-digest support for Percona Server slow log rate limiting
* Added pt-agent --ping
* Added pt-mysql-summary --all-databases
* Added pt-stalk --sleep-collect
* Added pt-table-sync --[no]check-child-tables
* Fixed bug 1249150: PTDEBUG prints some info to STDOUT
* Fixed bug 1248363: pt-agent requires restart after changing MySQL options
* Fixed bug 1248778: pt-agent --install on PXC is not documented
* Fixed bug 1250973: pt-agent --install doesn't check for previous install
* Fixed bug 1250968: pt-agent --install suggest MySQL user isn't quoted
* Fixed bug 1251004: pt-agent --install error about slave is confusing
* Fixed bug 1251726: pt-agent --uninstall fails if agent is running
* Fixed bug 1248785: pt-agent docs don't list privs required for its MySQL user
* Fixed bug 1215016: pt-deadlock-logger docs use pt-fk-error-logger
* Fixed bug 1201443: pt-duplicate-key-checker error when EXPLAIN key_len=0
* Fixed bug 1217013: pt-duplicate-key-checker misses exact duplicate unique indexes
* Fixed bug 1214685: pt-mysql-summary schema dump prompt can't be disabled
* Fixed bug 1195628: pt-online-schema-change gets stuck looking for its own _new table
* Fixed bug 1249149: pt-query-digest stats prints to STDOUT instead of STDERR
* Fixed bug 1071979: pt-stak error parsing df with NFS
* Fixed bug 1223458: pt-table-sync deletes child table rows
v2.2.5 released 2013-10-16
* Added Query_time histogram bucket counts to pt-query-digest JSON output
* Added pt-online-schema-change --[no]drop-triggers option
* Fixed bug 1206677: pt-agent docs reference clodu.percona.com
* Fixed bug 1226721: pt-agent on CentOS 5 fails to send data
* Fixed bug 1199589: pt-archiver deletes data despite --dry-run
* Fixed bug 1206728: pt-deadlock-logger 2.2 requires DSN on command line
* Fixed bug 1209436: pt-kill --log-dsn may not work on Perl 5.8
* Fixed bug 1215608: pt-online-schema-change new table suffix is hard-coded
* Fixed bug 821692: pt-query-digest doesn't distill LOAD DATA correctly
* Fixed bug 984053: pt-query-digest doesn't distill INSERT/REPLACE without INTO correctly
* Fixed bug 821690: pt-query-digest doesn't distill IF EXISTS correctly
* Fixed bug 1210537: pt-table-checksum --recursion-method=cluster crashes if no nodes are found
* Fixed bug 944051: pt-table-checksum has ambiguous exit status
* Fixed bug 1229861: pt-table-sync quotes float values, can't sync
v2.2.4 released 2013-07-18
* Implemented pt-query-digest anonymous JSON output
* Implemented pt-online-schema-change timestamp output
* Fixed bug 1182856: Zero values causes "Invalid --set-vars value: var=0"
* Fixed bug 1195034: pt-deadlock-logger error: Use of uninitialized value $ts in pattern match (m//)
* Fixed bug 1137556: pt-heartbeat docs don't account for --utc
* Fixed bug 1188264: pt-online-schema-change error copying rows: Undefined subroutine &pt_online_schema_change::get
* Fixed bug 1171968: pt-query-digest docs don't mention --type=rawlog
* Fixed bug 1176010: pt-query-digest doesn't group db and `db` together
* Fixed bug 1174956: pt-query-digest and pt-fingerprint don't strip some multi-line comments
* Fixed bug 1172317: pt-sift does not work if pt-stalk did not collect due to a full disk
* Fixed bug 1136559: pt-table-checksum: Deep recursion on subroutine "SchemaIterator::_iterate_dbh"
* Fixed bug 1199591: pt-table-checksum doesn't use non-unique index with highest cardinality
* Fixed bug 1163735: pt-table-checksum fails if explicit_defaults_for_timestamp is enabled in 5.6
* Fixed bug 1168434: pt-upgrade reports differences on NULL
* Fixed bug 1168106: pt-variable-advisor has the wrong default value for innodb_max_dirty_pages_pct in 5.5 and 5.6
* Fixed bug 1168110: pt-variable-advisor shows key_buffer_size in 5.6 as unconfigured (even though it is)
v2.2.3 released 2013-06-17
* Added new tool: pt-agent
* Fixed bug 1188002: pt-online-schema-change causes "ERROR 1146 (42S02): Table 'db._t_new' doesn't exist"
v2.2.2 released 2013-04-24
* Added --show-all to pt-query-digest
* Added --recursion-method=cluster to pt-table-checksum
* Fixed bug 1127450: pt-archiver --bulk-insert may corrupt data
* Fixed bug 1163372: pt-heartbeat --utc --check always returns 0
* Fixed bug 1156901: pt-query-digest --processlist reports duplicate queries for replication thread
* Fixed bug 1160338: pt-query-digest 2.2 prints unwanted debug info on tcpdump parsing errors
* Fixed bug 1160918: pt-query-digest 2.2 prints too many string values
* Fixed bug 1156867: pt-stalk prints the wrong variable name in verbose mode when --function is used
* Fixed bug 1081733: pt-stalk plugins can't access the real --prefix
* Fixed bug 1099845: pt-table-checksum pxc same_node function incorrectly uses wsrep_sst_receive_address
* Fixed bug 821502: Some tools don't have --help or --version
* Fixed bug 947893: Some tools use @@hostname without /*!50038*/
* Fixed bug 1082406: An explicitly set wsrep_node_incoming_address may make SHOW STATUS LIKE 'wsrep_incoming_addresses' return a portless address
v2.2.1 released 2013-03-14
* Official support for MySQL 5.6
* Official support for Percona XtraDB Cluster
* Redesigned pt-query-digest
* Redesigned pt-upgrade
* Redesigned pt-fk-error-logger
* Redesigned pt-deadlock-logger
* Changed --set-vars in all tools
* Renamed --retries to --tries in pt-online-schema-change
* Added --check-read-only to pt-heartbeat
* Added MySQL options to pt-mysql-summary
* Added MySQL options to pt-stalk
* Removed --lock-wait-timeout from pt-online-schema-change (use --set-vars)
* Removed --lock-wait-timeout from pt-table-checksum (use --set-vars)
* Removed pt-query-advisor
* Removed pt-tcp-model
* Removed pt-trend
* Removed pt-log-player
* Enabled --version-check by default in all tools
* Fixed bug 1008796: Several tools don't have --database
* Fixed bug 1087319: Quoter::serialize_list() doesn't handle multiple NULL values
* Fixed bug 1086018: pt-config-diff needs to parse wsrep_provider_options
* Fixed bug 1056838: pt-fk-error-logger --run-time works differently than pt-deadlock-logger --run-time
* Fixed bug 1093016: pt-online-schema-change doesn't retry RENAME TABLE
* Fixed bug 1113301: pt-online-schema-change blocks on metadata locks
* Fixed bug 1125665: pt-stalk --no-stalk silently clobbers other options, acts magically
* Fixed bug 1019648: pt-stalk truncates InnoDB status if there are too many transactions
* Fixed bug 1087804: pt-table-checksum doesn't warn if no slaves are found
v2.1.9 released 2013-02-14
* Fixed bug 1103221: pt-heartbeat 2.1.8 doesn't use precision/sub-second timestamps
* Fixed bug 1099665: pt-heartbeat 2.1.8 reports big time drift with UTC_TIMESTAMP
* Fixed bug 1099836: pt-online-schema-change fails with "Duplicate entry" on MariaDB
* Fixed bug 1103672: pt-online-schema-change makes bad DELETE trigger if PK is re-created with new columns
* Fixed bug 1115333: pt-pmp doesn't list the origin lib for each function
* Fixed bug 823411: pt-query-digest shouldn't print "Error: none" for tcpdump
* Fixed bug 1103045: pt-query-digest fails to parse non-SQL errors
* Fixed bug 1105077: pt-table-checksum: Confusing error message with binlog_format ROW or MIXED on slave
* Fixed bug 918056: pt-table-sync false-positive error "Cannot nibble table because MySQL chose no index instead of the PRIMARY index"
* Fixed bug 1099933: pt-stalk is too verbose, fills up log
v2.1.8 released 2012-12-21
* Beta support for MySQL 5.6
* Beta support for Percona XtraDB Cluster
* pt-online-schema-change: If ran on Percona XtraDB Cluster, requires PXC 5.5.28 or newer
* pt-table-checksum: If ran on Percona XtraDB Cluster, requires PXC 5.5.28 or newer
* pt-upgrade: Added --[no]disable-query-cache
* Fixed bug 927955: Bad pod2rst transformation
* Fixed bug 898665: Bad online docs formatting for --[no]vars
* Fixed bug 1022622: pt-config-diff is case-sensitive
* Fixed bug 1007938: pt-config-diff doesn't handle end-of-line comments
* Fixed bug 917770: pt-config-diff Use of uninitialized value in substitution (s///) at line 1996
* Fixed bug 1082104: pt-deadlock-logger doesn't handle usernames with dashes
* Fixed bug 886059: pt-heartbeat handles timezones inconsistently
* Fixed bug 1086259: pt-kill --log-dsn timestamp is wrong
* Fixed bug 1015590: pt-mysql-summary doesn't handle renamed variables in Percona Server 5.5
* Fixed bug 1079341: pt-online-schema-change checks for foreign keys on MyISAM tables
* Fixed bug 823431: pt-query-advisor hangs on big queries
* Fixed bug 996069: pt-query-advisor RES.001 is incorrect
* Fixed bug 933465: pt-query-advisor false positive on RES.001
* Fixed bug 937234: pt-query-advisor issues wrong RES.001
* Fixed bug 1082599: pt-query-digest fails to parse timestamp with no query
* Fixed bug 1078838: pt-query-digest doesn't parse general log with "Connect user as user"
* Fixed bug 957442: pt-query-digest with custom --group-by throws error
* Fixed bug 887638: pt-query-digest prints negative byte offset
* Fixed bug 831525: pt-query-digest help output mangled
* Fixed bug 932614: pt-slave-restart CHANGE MASTER query causes error
* Fixed bug 1046440: pt-stalk purge_samples slows down checks
* Fixed bug 986847: pt-stalk does not report NFS iostat
* Fixed bug 1074179: pt-table-checksum doesn't ignore tables for --replicate-check-only
* Fixed bug 911385: pt-table-checksum v2 fails when --resume + --ignore-database is used
* Fixed bug 1041391: pt-table-checksum debug statement for "Chosen hash func" prints undef
* Fixed bug 1075638: pt-table-checksum Illegal division by zero at line 7950
* Fixed bug 1052475: pt-table-checksum uninitialized value in numeric lt (<) at line 8611
* Fixed bug 1078887: Tools let --set-vars clobber the required SQL mode
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