# DB Connection Fail

**URL:** <https://forums.percona.com/t/db-connection-fail/461>\
**Category:** Other MySQL® Questions\
**Created:** [September 24, 2007, 3:49am UTC](https://forums.percona.com/t/db-connection-fail/461 "2007-09-24T03:49:48Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Prabhat](https://avatars.discourse-cdn.com/v4/letter/p/b782af/32.png) [@Prabhat](https://forums.percona.com/u/Prabhat)\
**Post date:** [September 24, 2007, 3:49am UTC](https://forums.percona.com/t/db-connection-fail/461/1 "2007-09-24T03:49:48Z")

</div>

I stuck with problem, My database mysql server giving frequently error DB : connection fail  
i tried almost all thing but then also in a day 10-12 time its give this error.  
I had Separate database server than web server with 16 GB RAM server with high speed server

This is MY database server variable configuration,

```
Variable name Current value	auto_increment_increment 1	auto_increment_offset 1	automatic_sp_privileges ON	back_log 50	basedir /usr/	bdb_cache_size 8388600	bdb_home /lib/mysql/	bdb_log_buffer_size 1036288	bdb_logdir bdb_max_lock 10000	bdb_shared_data OFF	bdb_tmpdir /tmp/	binlog_cache_size 32768	bulk_insert_buffer_size 8388608	character_set_client latin1 character_set_connection latin1	character_set_database latin1	character_set_filesystem binary	character_set_results latin1	character_set_server latin1	character_set_system utf8	character_sets_dir /usr/share/mysql/charsets/	collation_connection latin1_swedish_ci	collation_database latin1_swedish_ci	collation_server latin1_swedish_ci	completion_type 0	concurrent_insert 1	connect_timeout 10	datadir /lib/mysql/	date_format %Y-%m-%d	datetime_format %Y-%m-%d %H:%i:%s	default_week_format 0	delay_key_write ON	delayed_insert_limit 100	delayed_insert_timeout 300	delayed_queue_size 1000	div_precision_increment 4	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 DISABLED	have_isam NO	have_merge_engine YES	have_ndbcluster NO	have_openssl 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 innodb_data_home_dir 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_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 56623104	key_cache_age_threshold 300	key_cache_block_size 1024	key_cache_division_limit 100	language /usr/share/mysql/english/	large_files_support ON	large_page_size 0	large_pages OFF	lc_time_names en_US	license GPL	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 2	long_query_time 10	low_priority_updates OFF	lower_case_file_system OFF	lower_case_table_names 0	max_allowed_packet 16776192	max_binlog_cache_size 18446744073709551615	max_binlog_size 1073741824	max_connect_errors 10	max_connections 200	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 9223372036854775807	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 4258	optimizer_prune_level 1	optimizer_search_depth 62	pid_file /var/run/mysqld/mysqld.pid	port 1044	preload_buffer_size 32768	prepared_stmt_count 0	protocol_version 10	query_alloc_block_size 8192	query_cache_limit 1048576	query_cache_min_res_unit 4096	query_cache_size 209715200	query_cache_type ON	query_cache_wlock_invalidate OFF	query_prealloc_size 8192	range_alloc_block_size 2048	read_buffer_size 131072	read_only OFF	read_rnd_buffer_size 262144	relay_log_purge ON	relay_log_space_limit 0	rpl_recovery_rank 0	secure_auth OFF	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 28311544	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	system_time_zone PDT	table_cache 2024	table_lock_wait_timeout 50	table_type MyISAM	thread_cache_size 40	thread_stack 262144	time_format %H:%i:%s	time_zone SYSTEM	timed_mutexes OFF	tmp_table_size 1048576000	tmpdir /tmp/	transaction_alloc_block_size 8192	transaction_prealloc_size 4096	tx_isolation REPEATABLE-READ	updatable_views_with_limit YES	version 5.0.27	version_bdb Sleepycat Software: Berkeley DB 4.1.24: (October 21, 2006)	version_comment Source distribution	version_compile_machine x86_64	version_compile_os redhat-linux-gnu	wait_timeout 28800</pre>

```