[opencms-dev] MySQLNonTransientConnectionException - too many connections
HERNAN - TFSLA
info at tfsla.com
Tue May 3 18:35:33 CEST 2011
TOO MANY OPEN FILES is a very common problem. The tricky part, is how to
change it. In a couple of linux distros, there is a bug causing TOMCAT to
ignore SO limit definitions. To solved this definitly change the tomcat
init.
On ubuntu for example, go to /etc/init.d/tomcat6, locate the line
JVM_TMP=/tmp/tomcat6-tmp and below add the following lines:
ulimit -Hn 8192
ulimit -Sn 8192
You should notice a better responsive system.
Paul-Inge Flakstad wrote:
>
> Hi Hernan,
>
> I used all of yesterday to dig deep in the config of all
> Tomat, Apache, MySQL and OpenCms. Experimented for a while, it
> worked better (today I started seeing "Too many files open"
> exceptions though).
>
> After implementing the changes you suggested here, it seems
> everything is A LOT better - probably very much due to the
> key_buffer_size, which provided the major change after
> yesterday's experimenting.
>
> I'll just have to wait and see if things are stable now.
>
> Thank you so much for your help! :)
>
> 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: 3. mai 2011 00:22
>> To: opencms-dev at opencms.org
>> Subject: Re: [opencms-dev]
>> MySQLNonTransientConnectionException - too many connections
>>
>>
>> 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---t
> oo-many-connections-tp31521630p31527995.html
>> Sent from the OpenCMS - Dev mailing list archive at Nabble.com.
>>
>>
>> _______________________________________________
>> This mail is sent to you from the opencms-dev mailing list
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>> please visit
>> http://lists.opencms.org/mailman/listinfo/opencms-dev
>
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> http://lists.opencms.org/mailman/listinfo/opencms-dev
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