I see no problem like that with 10.2.6 (on Fedora 25) or 10.2.5 (on Ubuntu 14.04) built from source: openxs@ao756:~/dbs/maria10.2$ pt-mysql-summary --version pt-mysql-summary 3.0.2 openxs@ao756:~/dbs/maria10.2$ pt-mysql-summary --socket=/tmp/mariadb.sock # Percona Toolkit MySQL Summary Report ####################### System time | 2017-04-18 09:58:52 UTC (local TZ: EEST +0300) # Instances ################################################## Port Data Directory Nice OOM Socket ===== ========================== ==== === ====== /var/lib/mysql 0 0 3307 /home/openxs/dbs/maria10.2/data 0 0 /tmp/mariadb.sock # MySQL Executable ########################################### Path to executable | /home/openxs/dbs/maria10.2/bin/mysqld Has symbols | Yes Path to executable | /usr/sbin/mysqld Has symbols | No # Report On Port 3307 ######################################## User | @localhost Time | 2017-04-18 12:58:52 (EEST) Hostname | ao756 Version | 10.2.5-MariaDB Source distribution Built On | Linux x86_64 Started | 2017-04-18 12:57 (up 0+00:02:21) Databases | 2 Datadir | /home/openxs/dbs/maria10.2/data/ Processes | 1 connected, 1 running Replication | Is not a slave, has 0 slaves connected Pidfile | /home/openxs/dbs/maria10.2/data/ao756.pid (exists) # Processlist ################################################ Command COUNT(*) Working SUM(Time) MAX(Time) ------------------------------ -------- ------- --------- --------- User COUNT(*) Working SUM(Time) MAX(Time) ------------------------------ -------- ------- --------- --------- Host COUNT(*) Working SUM(Time) MAX(Time) ------------------------------ -------- ------- --------- --------- db COUNT(*) Working SUM(Time) MAX(Time) ------------------------------ -------- ------- --------- --------- State COUNT(*) Working SUM(Time) MAX(Time) ------------------------------ -------- ------- --------- --------- # Status Counters (Wait 10 Seconds) ########################## Variable Per day Per second 11 secs Access_denied_errors 7000 ... Questions 70000 3 Rocksdb_block_cache_add 3000 Rocksdb_block_cache_data_hit 10000 Rocksdb_block_cache_data_miss 1250 Rocksdb_block_cache_hit 17500 Rocksdb_block_cache_index_hit 8000 Rocksdb_block_cache_index_miss 1750 Rocksdb_block_cache_miss 3000 Rocksdb_bytes_read 125000 1 Rocksdb_bytes_written 7000 Rocksdb_compact_write_bytes 700000 7 Rocksdb_memtable_miss 5000 Rocksdb_no_file_opens 1750 Rocksdb_number_keys_read 5000 Rocksdb_number_sst_entry_put 2500 Rocksdb_number_superversion_acquires 1250 Rocksdb_wal_bytes 7000 Rocksdb_wal_synced 600 Rocksdb_write_self 600 Rocksdb_write_wal 600 Rows_read 15000 Rows_sent 4000000 45 60 Rows_tmp_read 3500000 45 60 Select_scan 10000 Syncs 1250 Table_locks_immediate 12500 Threads_created 600 Uptime 90000 1 1 # Table cache ################################################ Size | 431 Usage | 2% # Key Percona Server features ################################ Table & Index Stats | Disabled Multiple I/O Threads | Enabled Corruption Resilient | Not Supported Durable Replication | Not Supported Import InnoDB Tables | Not Supported Fast Server Restarts | Not Supported Enhanced Logging | Disabled Replica Perf Logging | Enabled Response Time Hist. | Not Supported Smooth Flushing | Not Supported HandlerSocket NoSQL | Not Supported Fast Hash UDFs | Unknown # Percona XtraDB Cluster ##################################### wsrep_on | OFF # Plugins #################################################### InnoDB compression | ACTIVE # Query cache ################################################ query_cache_type | OFF Size | 1,0M Usage | 1% HitToInsertRatio | 0% # Schema ##################################################### Specify --databases or --all-databases to dump and summarize schemas # Noteworthy Technologies #################################### SSL | No Explicit LOCK TABLES | No Delayed Insert | No XA Transactions | No NDB Cluster | No Prepared Statements | No Prepared statement count | 0 # InnoDB ##################################################### Version | 5.7.14 Buffer Pool Size | 128,0M Buffer Pool Fill | 4% Buffer Pool Dirty | 0% File Per Table | ON Page Size | 16k Log File Size | 2 * 48,0M = 96,0M Log Buffer Size | 16M Flush Method | Flush Log At Commit | 1 XA Support | ON Checksums | ON Doublewrite | ON R/W I/O Threads | 4 4 I/O Capacity | 200 Thread Concurrency | 0 Concurrency Tickets | 5000 Commit Concurrency | 0 Txn Isolation Level | REPEATABLE-READ Adaptive Flushing | ON Adaptive Checkpoint | # MyISAM ##################################################### Key Cache | 128,0M Pct Used | 20% Unflushed | 0% # Security ################################################### Users | Old Passwords | OFF # Binary Logging ############################################# # Noteworthy Variables ####################################### Auto-Inc Incr/Offset | 1/1 default_storage_engine | InnoDB flush_time | 0 init_connect | init_file | sql_mode | STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION join_buffer_size | 256k sort_buffer_size | 2M read_buffer_size | 128k read_rnd_buffer_size | 256k bulk_insert_buffer | 0,00 max_heap_table_size | 16M tmp_table_size | 16M max_allowed_packet | 16M thread_stack | 292k log | log_error | /home/openxs/dbs/maria10.2/data/ao756.err log_warnings | 2 log_slow_queries | log_queries_not_using_indexes | OFF log_slave_updates | OFF # Configuration File ######################################### Config File | /etc/my.cnf [mysqld_safe] thp-setting = never pid_file = /var/lib/mysql/ao756.pid [mysql] connect_timeout = 2 [mysqld] server_id = 1 innodb_file_format = Barracuda table_open_cache = 1156 table_open_cache_instances = 1 log_bin gtid_mode = ON enforce_gtid_consistency log_slave_updates # Memory management library ################################## jemalloc is not enabled in MySQL config for process with ID 11088 grep: /proc/1829/environ: Permission denied jemalloc is not enabled in MySQL config for process with ID 1829 # The End #################################################### So, it may have something more to do with testing environment than MariaDB 10.2.x itself.