[opencms-dev] MySQLNonTransientConnectionException - too many connections
HERNAN - TFSLA
info at tfsla.com
Tue May 3 00:22:00 CEST 2011
If both JAVA and MYSQL are hunging at the same time, most probably, you have
an issue with a process / coding rather than config. Nevertheless, your
config is not a very happy one :)
1) First of all, you should probably enable SLOW QUERIES and during the high
cpu usage show a process list on MYSQL (queries on execution).
2) if you are using MYISAM table format, adjust the KEY_BUFFER_SIZE value to
4gb (1/3 of the total ram). If you are using INNODB, do that for
INNODB_BUFFER_POOL_SIZE.
3) change your TABLE_CACHE to something like 512, thread_cache to 32 and
change max_tmp_tables to 128mb.
4) change max_connections to something like 200. There is no reason to put
it on 2000 for a small site.
5) change MAX_ACTIVE on the opencms.properties to 200 (it should be
sufficient with 25 for small sites, but it depends on a lot of factors such
as connection types, cycling, session duration, etc).
6) on my.cnf add the following line: --skip-name-resolve
I'm also assuming your flexcache configuration is in place for every major
JSP and you have an Apache cache / content expiration strategy.
Please, change all on we continue from there. If the problem presents itself
again, please post the SHOW PROCESS LIST and slow queries results.
Paul-Inge Flakstad wrote:
>
> Hi,
>
> Thanks for the help, I appreciate it very much!
>
> Our server admin says Java and MySQL are both at 100% CPU when the system
> hangs.
>
> The box is a new dual-core with 16GB RAM.
>
> Here's the config (I removed some irrelevant parts):
>
>
> The connector is AJP 1.3 - defined in server.xml:
> <Connector port="8009" emptySessionPath="true" protocol="AJP/1.3"
> URIEncoding="utf-8" />
>
>
> opencms.properties
> ------------------
> #
> # Configuration of the driver manager
> #################################################################################
> driver.vfs=db
> driver.project=db
> driver.user=db
> driver.history=db
>
> #
> # Declaration of database pools
> #################################################################################
> db.pools=default
>
> #
> # Configuration of the default database pool
> #################################################################################
> # name of the JDBC driver
> db.pool.default.jdbcDriver=org.gjt.mm.mysql.Driver
>
> # URL of the JDBC driver
> db.pool.default.jdbcUrl=jdbc:mysql://localhost:3306/npcms
>
> # optional parameters for the URL of the JDBC driver
> db.pool.default.jdbcUrl.params=?characterEncoding\=UTF-8
>
> # user name to connect to the database
> db.pool.default.user=xxxxxxxxx
>
> # password to connect to the database
> db.pool.default.password=xxxxxxxxxx
>
> # the URL to make the JDBC DriverManager return connections from the DBCP
> pool
> db.pool.default.poolUrl=opencms:default
>
> # the maximum number of objects that can be borrowed from the pool
> db.pool.default.maxActive=25
>
> # the maximum amount of time before throwing an exception when the pool is
> exhausted
> db.pool.default.maxWait=2000
>
> # the minimum number of objects that will kept connected
> db.pool.default.minIdle=3
>
> # the maximum number of objects that can sit idled in the pool
> db.pool.default.maxIdle=10
>
> # action to take when the pool is exhausted {grow|block|fail}
> db.pool.default.whenExhaustedAction=grow
>
> # connections will be validated before they are borrowed from the pool
> db.pool.default.testOnBorrow=false
>
> # connections will be validated by evictor thread
> db.pool.default.testWhileIdle=true
>
> # number of milliseconds to sleep between runs of the evictor thread
> # -1 means no idle connection evictor thread will be run
> db.pool.default.timeBetweenEvictionRuns=3600000
>
> # number of connections tested in a run of the evictor thread
> db.pool.default.numTestsPerEvictionRun=3
>
> # minimum amount of time in milliseconds a connection may be idle in the
> pool before it is eligable for eviction
> db.pool.default.minEvictableIdleTime=1800000
>
> # the query to validate connections
> db.pool.default.testQuery=SELECT STRUCTURE_ID FROM CMS_OFFLINE_STRUCTURE
> WHERE RESOURCE_PATH = '/'
> #db.pool.default.testQuery=
>
> # number of attempts to connect to the database during startup (default =
> 10)
> db.pool.default.connects=10
>
> # sleep time between two attempts to connect to the database during
> startup in ms (default = 5000)
> db.pool.default.wait=5000
>
> #
> # Configuration for statement pooling
> #################################################################################
> db.statements.default.pooling=true
> db.statements.default.maxActive=200
> db.statements.default.maxWait=2000
> db.statements.default.maxIdle=100
> db.statements.default.whenExhaustedAction=block
>
> #
> # Configuration of the database driver manager
> #################################################################################
> db.name=mysql_41
>
> db.vfs.driver=org.opencms.db.mysql.CmsVfsDriver
> db.vfs.pool=opencms:default
> db.vfs.sqlmanager=org.opencms.db.mysql.CmsSqlManager
>
> db.project.driver=org.opencms.db.mysql.CmsProjectDriver
> db.project.pool=opencms:default
> db.project.sqlmanager=org.opencms.db.mysql.CmsSqlManager
>
> db.user.driver=org.opencms.db.mysql.CmsUserDriver
> db.user.pool=opencms:default
> db.user.sqlmanager=org.opencms.db.mysql.CmsSqlManager
>
> db.history.driver=org.opencms.db.mysql.CmsHistoryDriver
> db.history.pool=opencms:default
> db.history.sqlmanager=org.opencms.db.mysql.CmsSqlManager
>
> db.cos.pool=opencms:default
> #
> # End of opencms.properties
> #################################################################################
>
>
> mysql> show variables;
> +---------------------------------+------------------------------------------------------------+
> | Variable_name | Value
> |
> +---------------------------------+------------------------------------------------------------+
> | auto_increment_increment | 1
> |
> | auto_increment_offset | 1
> |
> | automatic_sp_privileges | ON
> |
> | back_log | 50
> |
> | basedir | /usr/
> |
> | bdb_cache_size | 8384512
> |
> | bdb_home | /var/lib/mysql/
> |
> | bdb_log_buffer_size | 262144
> |
> | bdb_logdir |
> |
> | bdb_max_lock | 10000
> |
> | bdb_shared_data | OFF
> |
> | bdb_tmpdir | /tmp/
> |
> | binlog_cache_size | 32768
> |
> | bulk_insert_buffer_size | 8388608
> |
> | completion_type | 0
> |
> | concurrent_insert | 1
> |
> | connect_timeout | 10
> |
> | default_week_format | 0
> |
> | delay_key_write | ON
> |
> | delayed_insert_limit | 100
> |
> | delayed_insert_timeout | 300
> |
> | delayed_queue_size | 1000
> |
> | div_precision_increment | 4
> |
> | keep_files_on_create | OFF
> |
> | engine_condition_pushdown | OFF
> |
> | expire_logs_days | 0
> |
> | flush | OFF
> |
> | flush_time | 0
> |
> | ft_boolean_syntax | + -><()~*:""&|
> |
> | ft_max_word_len | 84
> |
> | ft_min_word_len | 4
> |
> | ft_query_expansion_limit | 20
> |
> | ft_stopword_file | (built-in)
> |
> | group_concat_max_len | 1024
> |
> | have_archive | NO
> |
> | have_bdb | YES
> |
> | have_blackhole_engine | NO
> |
> | have_compress | YES
> |
> | have_crypt | YES
> |
> | have_csv | NO
> |
> | have_dynamic_loading | YES
> |
> | have_example_engine | NO
> |
> | have_federated_engine | NO
> |
> | have_geometry | YES
> |
> | have_innodb | YES
> |
> | have_isam | NO
> |
> | have_merge_engine | YES
> |
> | have_ndbcluster | NO
> |
> | have_openssl | DISABLED
> |
> | have_ssl | DISABLED
> |
> | have_query_cache | YES
> |
> | have_raid | NO
> |
> | have_rtree_keys | YES
> |
> | have_symlink | YES
> |
> | init_connect |
> |
> | init_file |
> |
> | init_slave |
> |
> | innodb_additional_mem_pool_size | 1048576
> |
> | innodb_autoextend_increment | 8
> |
> | innodb_buffer_pool_awe_mem_mb | 0
> |
> | innodb_buffer_pool_size | 8388608
> |
> | innodb_checksums | ON
> |
> | innodb_commit_concurrency | 0
> |
> | innodb_concurrency_tickets | 500
> |
> | innodb_data_file_path | ibdata1:10M:autoextend
> |
> | innodb_data_home_dir |
> |
> | innodb_adaptive_hash_index | ON
> |
> | innodb_doublewrite | ON
> |
> | innodb_fast_shutdown | 1
> |
> | innodb_file_io_threads | 4
> |
> | innodb_file_per_table | OFF
> |
> | innodb_flush_log_at_trx_commit | 1
> |
> | innodb_flush_method |
> |
> | innodb_force_recovery | 0
> |
> | innodb_lock_wait_timeout | 50
> |
> | innodb_locks_unsafe_for_binlog | OFF
> |
> | innodb_log_arch_dir |
> |
> | innodb_log_archive | OFF
> |
> | innodb_log_buffer_size | 1048576
> |
> | innodb_log_file_size | 5242880
> |
> | innodb_log_files_in_group | 2
> |
> | innodb_log_group_home_dir | ./
> |
> | innodb_max_dirty_pages_pct | 90
> |
> | innodb_max_purge_lag | 0
> |
> | innodb_mirrored_log_groups | 1
> |
> | innodb_open_files | 300
> |
> | innodb_rollback_on_timeout | OFF
> |
> | innodb_support_xa | ON
> |
> | innodb_sync_spin_loops | 20
> |
> | innodb_table_locks | ON
> |
> | innodb_thread_concurrency | 8
> |
> | innodb_thread_sleep_delay | 10000
> |
> | interactive_timeout | 28800
> |
> | join_buffer_size | 131072
> |
> | key_buffer_size | 8384512
> |
> | key_cache_age_threshold | 300
> |
> | key_cache_block_size | 1024
> |
> | key_cache_division_limit | 100
> |
> | large_files_support | ON
> |
> | large_page_size | 0
> |
> | large_pages | OFF
> |
> | local_infile | ON
> |
> | locked_in_memory | OFF
> |
> | log | OFF
> |
> | log_bin | OFF
> |
> | log_bin_trust_function_creators | OFF
> |
> | log_error |
> |
> | log_queries_not_using_indexes | OFF
> |
> | log_slave_updates | OFF
> |
> | log_slow_queries | OFF
> |
> | log_warnings | 1
> |
> | long_query_time | 10
> |
> | low_priority_updates | OFF
> |
> | lower_case_file_system | OFF
> |
> | lower_case_table_names | 0
> |
> | max_allowed_packet | 67108864
> |
> | max_binlog_cache_size | 18446744073709547520
> |
> | max_binlog_size | 1073741824
> |
> | max_connect_errors | 10
> |
> | max_connections | 2048
> |
> | max_delayed_threads | 20
> |
> | max_error_count | 64
> |
> | max_heap_table_size | 16777216
> |
> | max_insert_delayed_threads | 20
> |
> | max_join_size | 18446744073709551615
> |
> | max_length_for_sort_data | 1024
> |
> | max_prepared_stmt_count | 16382
> |
> | max_relay_log_size | 0
> |
> | max_seeks_for_key | 18446744073709551615
> |
> | max_sort_length | 1024
> |
> | max_sp_recursion_depth | 0
> |
> | max_tmp_tables | 32
> |
> | max_user_connections | 0
> |
> | max_write_lock_count | 18446744073709551615
> |
> | multi_range_count | 256
> |
> | myisam_data_pointer_size | 6
> |
> | myisam_max_sort_file_size | 9223372036853727232
> |
> | myisam_recover_options | OFF
> |
> | myisam_repair_threads | 1
> |
> | myisam_sort_buffer_size | 8388608
> |
> | myisam_stats_method | nulls_unequal
> |
> | net_buffer_length | 16384
> |
> | net_read_timeout | 30
> |
> | net_retry_count | 10
> |
> | net_write_timeout | 60
> |
> | new | OFF
> |
> | old_passwords | ON
> |
> | open_files_limit | 10240
> |
> | optimizer_prune_level | 1
> |
> | optimizer_search_depth | 62
> |
> | pid_file | /var/run/mysqld/mysqld.pid
> |
> | plugin_dir |
> |
> | port | 3306
> |
> | preload_buffer_size | 32768
> |
> | profiling | OFF
> |
> | profiling_history_size | 15
> |
> | protocol_version | 10
> |
> | query_alloc_block_size | 8192
> |
> | query_cache_limit | 1048576
> |
> | query_cache_min_res_unit | 4096
> |
> | query_cache_size | 0
> |
> | query_cache_type | ON
> |
> | query_cache_wlock_invalidate | OFF
> |
> | query_prealloc_size | 8192
> |
> | range_alloc_block_size | 4096
> |
> | read_buffer_size | 131072
> |
> | read_only | OFF
> |
> | read_rnd_buffer_size | 262144
> |
> | relay_log |
> |
> | relay_log_index |
> |
> | relay_log_info_file | relay-log.info
> |
> | relay_log_purge | ON
> |
> | relay_log_space_limit | 0
> |
> | rpl_recovery_rank | 0
> |
> | secure_auth | OFF
> |
> | secure_file_priv |
> |
> | server_id | 0
> |
> | skip_external_locking | ON
> |
> | skip_networking | OFF
> |
> | skip_show_database | OFF
> |
> | slave_compressed_protocol | OFF
> |
> | slave_load_tmpdir | /tmp/
> |
> | slave_net_timeout | 3600
> |
> | slave_skip_errors | OFF
> |
> | slave_transaction_retries | 10
> |
> | slow_launch_time | 2
> |
> | socket | /var/lib/mysql/mysql.sock
> |
> | sort_buffer_size | 2097144
> |
> | sql_big_selects | ON
> |
> | sql_mode |
> |
> | sql_notes | ON
> |
> | sql_warnings | OFF
> |
> | ssl_ca |
> |
> | ssl_capath |
> |
> | ssl_cert |
> |
> | ssl_cipher |
> |
> | ssl_key |
> |
> | storage_engine | MyISAM
> |
> | sync_binlog | 0
> |
> | sync_frm | ON
> |
> | table_cache | 64
> |
> | table_lock_wait_timeout | 50
> |
> | table_type | MyISAM
> |
> | thread_cache_size | 0
> |
> | thread_stack | 262144
> |
> | timed_mutexes | OFF
> |
> | tmp_table_size | 33554432
> |
> | transaction_alloc_block_size | 8192
> |
> | transaction_prealloc_size | 4096
> |
> | tx_isolation | REPEATABLE-READ
> |
> | updatable_views_with_limit | YES
> |
> | wait_timeout | 28800
> |
> +---------------------------------+------------------------------------------------------------+
>
>
> mysql> show status;
> +-----------------------------------+-----------+
> | Variable_name | Value |
> +-----------------------------------+-----------+
> | Aborted_clients | 34 |
> | Aborted_connects | 1 |
> | Binlog_cache_disk_use | 0 |
> | Binlog_cache_use | 0 |
> | Bytes_received | 128 |
> | Bytes_sent | 162 |
> | Com_admin_commands | 0 |
> | Com_alter_db | 0 |
> | Com_alter_table | 0 |
> | Com_analyze | 0 |
> | Com_backup_table | 0 |
> | Com_begin | 0 |
> | Com_call_procedure | 0 |
> | Com_change_db | 0 |
> | Com_change_master | 0 |
> | Com_check | 0 |
> | Com_checksum | 0 |
> | Com_commit | 0 |
> | Com_create_db | 0 |
> | Com_create_function | 0 |
> | Com_create_index | 0 |
> | Com_create_table | 0 |
> | Com_create_user | 0 |
> | Com_dealloc_sql | 0 |
> | Com_delete | 0 |
> | Com_delete_multi | 0 |
> | Com_do | 0 |
> | Com_drop_db | 0 |
> | Com_drop_function | 0 |
> | Com_drop_index | 0 |
> | Com_drop_table | 0 |
> | Com_drop_user | 0 |
> | Com_execute_sql | 0 |
> | Com_flush | 0 |
> | Com_grant | 0 |
> | Com_ha_close | 0 |
> | Com_ha_open | 0 |
> | Com_ha_read | 0 |
> | Com_help | 0 |
> | Com_insert | 0 |
> | Com_insert_select | 0 |
> | Com_kill | 0 |
> | Com_load | 0 |
> | Com_load_master_data | 0 |
> | Com_load_master_table | 0 |
> | Com_lock_tables | 0 |
> | Com_optimize | 0 |
> | Com_preload_keys | 0 |
> | Com_prepare_sql | 0 |
> | Com_purge | 0 |
> | Com_purge_before_date | 0 |
> | Com_rename_table | 0 |
> | Com_repair | 0 |
> | Com_replace | 0 |
> | Com_replace_select | 0 |
> | Com_reset | 0 |
> | Com_restore_table | 0 |
> | Com_revoke | 0 |
> | Com_revoke_all | 0 |
> | Com_rollback | 0 |
> | Com_savepoint | 0 |
> | Com_select | 1 |
> | Com_set_option | 0 |
> | Com_show_binlog_events | 0 |
> | Com_show_binlogs | 0 |
> | Com_show_charsets | 0 |
> | Com_show_collations | 0 |
> | Com_show_column_types | 0 |
> | Com_show_create_db | 0 |
> | Com_show_create_table | 0 |
> | Com_show_databases | 0 |
> | Com_show_errors | 0 |
> | Com_show_fields | 0 |
> | Com_show_grants | 0 |
> | Com_show_innodb_status | 0 |
> | Com_show_keys | 0 |
> | Com_show_logs | 0 |
> | Com_show_master_status | 0 |
> | Com_show_ndb_status | 0 |
> | Com_show_new_master | 0 |
> | Com_show_open_tables | 0 |
> | Com_show_privileges | 0 |
> | Com_show_processlist | 0 |
> | Com_show_slave_hosts | 0 |
> | Com_show_slave_status | 0 |
> | Com_show_status | 1 |
> | Com_show_storage_engines | 0 |
> | Com_show_tables | 0 |
> | Com_show_triggers | 0 |
> | Com_show_variables | 0 |
> | Com_show_warnings | 0 |
> | Com_slave_start | 0 |
> | Com_slave_stop | 0 |
> | Com_stmt_close | 0 |
> | Com_stmt_execute | 0 |
> | Com_stmt_fetch | 0 |
> | Com_stmt_prepare | 0 |
> | Com_stmt_reset | 0 |
> | Com_stmt_send_long_data | 0 |
> | Com_truncate | 0 |
> | Com_unlock_tables | 0 |
> | Com_update | 0 |
> | Com_update_multi | 0 |
> | Com_xa_commit | 0 |
> | Com_xa_end | 0 |
> | Com_xa_prepare | 0 |
> | Com_xa_recover | 0 |
> | Com_xa_rollback | 0 |
> | Com_xa_start | 0 |
> | Compression | OFF |
> | Connections | 942289 |
> | Created_tmp_disk_tables | 0 |
> | Created_tmp_files | 93 |
> | Created_tmp_tables | 1 |
> | Delayed_errors | 0 |
> | Delayed_insert_threads | 0 |
> | Delayed_writes | 0 |
> | Flush_commands | 1 |
> | Handler_commit | 0 |
> | Handler_delete | 0 |
> | Handler_discover | 0 |
> | Handler_prepare | 0 |
> | Handler_read_first | 0 |
> | Handler_read_key | 0 |
> | Handler_read_next | 0 |
> | Handler_read_prev | 0 |
> | Handler_read_rnd | 0 |
> | Handler_read_rnd_next | 0 |
> | Handler_rollback | 0 |
> | Handler_savepoint | 0 |
> | Handler_savepoint_rollback | 0 |
> | Handler_update | 0 |
> | Handler_write | 132 |
> | Innodb_buffer_pool_pages_data | 25 |
> | Innodb_buffer_pool_pages_dirty | 0 |
> | Innodb_buffer_pool_pages_flushed | 1 |
> | Innodb_buffer_pool_pages_free | 487 |
> | Innodb_buffer_pool_pages_misc | 0 |
> | Innodb_buffer_pool_pages_total | 512 |
> | Innodb_buffer_pool_read_ahead_rnd | 1 |
> | Innodb_buffer_pool_read_ahead_seq | 0 |
> | Innodb_buffer_pool_read_requests | 560 |
> | Innodb_buffer_pool_reads | 18 |
> | Innodb_buffer_pool_wait_free | 0 |
> | Innodb_buffer_pool_write_requests | 1 |
> | Innodb_data_fsyncs | 7 |
> | Innodb_data_pending_fsyncs | 0 |
> | Innodb_data_pending_reads | 0 |
> | Innodb_data_pending_writes | 0 |
> | Innodb_data_read | 2592768 |
> | Innodb_data_reads | 31 |
> | Innodb_data_writes | 7 |
> | Innodb_data_written | 35328 |
> | Innodb_dblwr_pages_written | 1 |
> | Innodb_dblwr_writes | 1 |
> | Innodb_log_waits | 0 |
> | Innodb_log_write_requests | 0 |
> | Innodb_log_writes | 2 |
> | Innodb_os_log_fsyncs | 5 |
> | Innodb_os_log_pending_fsyncs | 0 |
> | Innodb_os_log_pending_writes | 0 |
> | Innodb_os_log_written | 1024 |
> | Innodb_page_size | 16384 |
> | Innodb_pages_created | 0 |
> | Innodb_pages_read | 25 |
> | Innodb_pages_written | 1 |
> | Innodb_row_lock_current_waits | 0 |
> | Innodb_row_lock_time | 0 |
> | Innodb_row_lock_time_avg | 0 |
> | Innodb_row_lock_time_max | 0 |
> | Innodb_row_lock_waits | 0 |
> | Innodb_rows_deleted | 0 |
> | Innodb_rows_inserted | 0 |
> | Innodb_rows_read | 25 |
> | Innodb_rows_updated | 0 |
> | Key_blocks_not_flushed | 0 |
> | Key_blocks_unused | 4158 |
> | Key_blocks_used | 6694 |
> | Key_read_requests | 696459654 |
> | Key_reads | 1824563 |
> | Key_write_requests | 4009303 |
> | Key_writes | 118979 |
> | Last_query_cost | 0.000000 |
> | Max_used_connections | 166 |
> | Not_flushed_delayed_rows | 0 |
> | Open_files | 69 |
> | Open_streams | 0 |
> | Open_tables | 64 |
> | Opened_tables | 0 |
> | Prepared_stmt_count | 0 |
> | Qcache_free_blocks | 0 |
> | Qcache_free_memory | 0 |
> | Qcache_hits | 0 |
> | Qcache_inserts | 0 |
> | Qcache_lowmem_prunes | 0 |
> | Qcache_not_cached | 0 |
> | Qcache_queries_in_cache | 0 |
> | Qcache_total_blocks | 0 |
> | Queries | 24309937 |
> | Questions | 2 |
> | Rpl_status | NULL |
> | Select_full_join | 0 |
> | Select_full_range_join | 0 |
> | Select_range | 0 |
> | Select_range_check | 0 |
> | Select_scan | 1 |
> | Slave_open_temp_tables | 0 |
> | Slave_retried_transactions | 0 |
> | Slave_running | OFF |
> | Slow_launch_threads | 0 |
> | Slow_queries | 0 |
> | Sort_merge_passes | 0 |
> | Sort_range | 0 |
> | Sort_rows | 0 |
> | Sort_scan | 0 |
> | Ssl_accept_renegotiates | 0 |
> | Ssl_accepts | 0 |
> | Ssl_callback_cache_hits | 0 |
> | Ssl_cipher | |
> | Ssl_cipher_list | |
> | Ssl_client_connects | 0 |
> | Ssl_connect_renegotiates | 0 |
> | Ssl_ctx_verify_depth | 0 |
> | Ssl_ctx_verify_mode | 0 |
> | Ssl_default_timeout | 0 |
> | Ssl_finished_accepts | 0 |
> | Ssl_finished_connects | 0 |
> | Ssl_session_cache_hits | 0 |
> | Ssl_session_cache_misses | 0 |
> | Ssl_session_cache_mode | NONE |
> | Ssl_session_cache_overflows | 0 |
> | Ssl_session_cache_size | 0 |
> | Ssl_session_cache_timeouts | 0 |
> | Ssl_sessions_reused | 0 |
> | Ssl_used_session_cache_entries | 0 |
> | Ssl_verify_depth | 0 |
> | Ssl_verify_mode | 0 |
> | Ssl_version | |
> | Table_locks_immediate | 33647849 |
> | Table_locks_waited | 1979 |
> | Tc_log_max_pages_used | 0 |
> | Tc_log_page_size | 0 |
> | Tc_log_page_waits | 0 |
> | Threads_cached | 0 |
> | Threads_connected | 85 |
> | Threads_created | 942288 |
> | Threads_running | 2 |
> | Uptime | 16392 |
> | Uptime_since_flush_status | 24309937 |
> +-----------------------------------+-----------+
>
>
> Best regards,
> Paul
>
>> -----Original Message-----
>> From: opencms-dev-bounces at opencms.org
>> [mailto:opencms-dev-bounces at opencms.org] On Behalf Of HERNAN - TFSLA
>> Sent: 2. mai 2011 14:19
>> To: opencms-dev at opencms.org
>> Subject: Re: [opencms-dev]
>> MySQLNonTransientConnectionException - too many connections
>>
>>
>> Please post your:
>> * opencms.properties
>> * mysql variables status (show status;)
>> * j/connector version
>>
>> Most likely you have your opencms.properties 'default' and is
>> not getting
>> along with some mysql configuration such as wait_timeout.
>>
>> Regards
>> Hernán.
>>
>>
>> Paul-Inge Flakstad wrote:
>> >
>> > Hi guys,
>> >
>> > We recently launched our primary website on OpenCms (yay!).
>> It is curretly
>> > at ~3000 pageviews a day. Not _that_ much traffic, but
>> every so often (way
>> > too often), it "hangs" - often for as long as a minute or more.
>> >
>> > This is what happens:
>> >
>> > com.mysql.jdbc.exceptions.MySQLNonTransientConnectionException: Data
>> > source rejected establishment of connection, message from
>> server: "Too
>> > many connections"
>> > at
>> com.mysql.jdbc.SQLError.createSQLException(SQLError.java:921)
>> > at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1070)
>> > at
>> com.mysql.jdbc.Connection.createNewIO(Connection.java:2748)
>> > at com.mysql.jdbc.Connection.<init>(Connection.java:1553)
>> > at
>> >
>> com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriv
>> er.java:285)
>> > at
>> java.sql.DriverManager.getConnection(DriverManager.java:582)
>> > at
>> java.sql.DriverManager.getConnection(DriverManager.java:185)
>> > at
>> >
>> org.apache.commons.dbcp.DriverManagerConnectionFactory.createC
>> onnection(DriverManagerConnectionFactory.java:65)
>> > at
>> >
>> org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(P
>> oolableConnectionFactory.java:294)
>> > at
>> >
>> org.apache.commons.pool.impl.GenericObjectPool.borrowObject(Ge
>> nericObjectPool.java:1148)
>> > at
>> >
>> org.apache.commons.dbcp.PoolingDriver.connect(PoolingDriver.java:176)
>> > at
>> java.sql.DriverManager.getConnection(DriverManager.java:582)
>> > at
>> java.sql.DriverManager.getConnection(DriverManager.java:207)
>> > at
>> >
>> org.opencms.db.CmsSqlManager.getConnectionByUrl(CmsSqlManager.
>> java:104)
>> > at
>> >
>> org.opencms.db.generic.CmsSqlManager.getConnection(CmsSqlManag
>> er.java:231)
>> > at
>> >
>> org.opencms.db.generic.CmsVfsDriver.readResource(CmsVfsDriver.
>> java:1931)
>> > ... 75 more
>> >
>> > The exception was not present in the several months of
>> development and
>> > beta testing, so it's no doubt the traffic that's causing
>> it. I've never
>> > seen this before, but then again, I've been working mostly
>> on smaller
>> > sites with much less traffic.
>> >
>> > After learning of the setting in MySQL, I have (just now) set
>> > max_connections to 2048. No max_connections was present in
>> my.cnf from
>> > before, so I'm guessing it was 100 (the default value).
>> >
>> > Will this fix things? Should I do anything else, in order
>> to allow many
>> > concurrent users / avoid this exception?
>> >
>> > Best regards,
>> > Paul
>> >
>> > _______________________________________________
>> > This mail is sent to you from the opencms-dev mailing list
>> > To change your list options, or to unsubscribe from the
>> list, please visit
>> > http://lists.opencms.org/mailman/listinfo/opencms-dev
>> >
>> >
>>
>> --
>> View this message in context:
>> http://old.nabble.com/MySQLNonTransientConnectionException---t
> oo-many-connections-tp31521630p31523002.html
>> Sent from the OpenCMS - Dev mailing list archive at Nabble.com.
>>
>>
>> _______________________________________________
>> This mail is sent to you from the opencms-dev mailing list
>> To change your list options, or to unsubscribe from the list,
>> please visit
>> http://lists.opencms.org/mailman/listinfo/opencms-dev
>
> _______________________________________________
> This mail is sent to you from the opencms-dev mailing list
> To change your list options, or to unsubscribe from the list, please visit
> http://lists.opencms.org/mailman/listinfo/opencms-dev
>
>
--
View this message in context: http://old.nabble.com/MySQLNonTransientConnectionException---too-many-connections-tp31521630p31527995.html
Sent from the OpenCMS - Dev mailing list archive at Nabble.com.
More information about the opencms-dev
mailing list