Hey there I m running vbulletin 4.0.7 and this is the problem, I m facing. From past 4 months now, I have getting numerous amount of SQL database error.. and everytime i get an error. I do increase wait time out or make changes to prevent it.. After making changes it goes away for couple of days, but then it start again. I own a dedicated server, plus I have hired server management team to look after my server. but they only perform an action when i asked them to do so. But i do not know much about server configuration. Okay so lets get to the issue. First let me show you couple of example of SQL database error I m getting: Mostly I get this one: Database error in vBulletin : mysql_connect() [<a href='function.mysql-connect'>function.mysql-connect</a>]: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (11) /home/user/public_html/includes/class_core.php on line 313 Code (markup): Here is something different which i only received at once: Database error in vBulletin 4.0.6: Invalid SQL: SELECT post.*, post.username AS postusername, post.ipaddress AS ip, IF(post.visible = 2, 1, 0) AS isdeleted, user.*, userfield.*, usertextfield.*, icon.title as icontitle, icon.iconpath, avatar.avatarpath, NOT ISNULL(customavatar.userid) AS hascustomavatar, customavatar.dateline AS avatardateline,customavatar.width AS avwidth,customavatar.height AS avheight, editlog.userid AS edit_userid, editlog.username AS edit_username, editlog.dateline AS edit_dateline, editlog.reason AS edit_reason, editlog.hashistory, postparsed.pagetext_html, postparsed.hasimages, sigparsed.signatureparsed, sigparsed.hasimages AS sighasimages, sigpic.userid AS sigpic, sigpic.dateline AS sigpicdateline, sigpic.width AS sigpicwidth, sigpic.height AS sigpicheight, IF(displaygroupid=0, user.usergroupid, displaygroupid) AS displaygroupid, infractiongroupid ,blog_user.entries FROM vb_post AS post LEFT JOIN vb_user AS user ON(user.userid = post.userid) LEFT JOIN vb_userfield AS userfield ON(userfield.userid = user.userid) LEFT JOIN vb_usertextfield AS usertextfield ON(usertextfield.userid = user.userid) LEFT JOIN vb_icon AS icon ON(icon.iconid = post.iconid) LEFT JOIN vb_avatar AS avatar ON(avatar.avatarid = user.avatarid) LEFT JOIN vb_customavatar AS customavatar ON(customavatar.userid = user.userid) LEFT JOIN vb_editlog AS editlog ON(editlog.postid = post.postid) LEFT JOIN vb_postparsed AS postparsed ON(postparsed.postid = post.postid AND postparsed.styleid = 14 AND postparsed.languageid = 1) LEFT JOIN vb_sigparsed AS sigparsed ON(sigparsed.userid = user.userid AND sigparsed.styleid = 14 AND sigparsed.languageid = 1) LEFT JOIN vb_sigpic AS sigpic ON(sigpic.userid = post.userid) LEFT JOIN vb_blog_user AS blog_user ON (blog_user.bloguserid = post.userid) WHERE post.postid IN (0669436) ORDER BY post.dateline; MySQL Error : Lost connection to MySQL server during query Error Number : 2013 Code (markup): ======================== Now from Admin cp >> Diagnostics >> MySQL Variables Here is what i got: auto_increment_increment 1 auto_increment_offset 1 automatic_sp_privileges ON back_log 50 basedir / 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 100 datadir /var/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 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 YES have_bdb NO have_blackhole_engine YES have_compress YES have_community_features NO have_profiling NO have_crypt YES have_csv YES have_dynamic_loading YES have_example_engine YES have_federated_engine YES have_geometry YES have_innodb DISABLED have_isam NO have_merge_engine YES have_ndbcluster NO have_openssl NO have_ssl NO have_query_cache YES have_raid NO have_rtree_keys YES have_symlink YES hostname cl-t206-530cl.privatedns.com 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_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 innodb_use_legacy_cardinality_algorithm ON interactive_timeout 100 join_buffer_size 1048576 key_buffer_size 16777216 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 ON log_warnings 1 long_query_time 3 low_priority_updates OFF lower_case_file_system OFF lower_case_table_names 0 max_allowed_packet 16777216 max_binlog_cache_size 18446744073709547520 max_binlog_size 1073741824 max_connect_errors 10 max_connections 2000 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 2000 max_write_lock_count 18446744073709551615 multi_range_count 256 myisam_data_pointer_size 6 myisam_max_sort_file_size 9223372036853727232 myisam_mmap_size 18446744073709551615 myisam_recover_options OFF myisam_repair_threads 1 myisam_sort_buffer_size 67108864 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 OFF open_files_limit 10000 optimizer_prune_level 1 optimizer_search_depth 62 pid_file /var/lib/mysql/cl-t206-530cl.privatedns.com.pid plugin_dir port 3306 preload_buffer_size 32768 protocol_version 10 query_alloc_block_size 8192 query_cache_limit 1048576 query_cache_min_res_unit 4096 query_cache_size 33554432 query_cache_type ON query_cache_wlock_invalidate OFF query_prealloc_size 8192 range_alloc_block_size 4096 read_buffer_size 2097152 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 2097152 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 EDT table_cache 1024 table_lock_wait_timeout 50 table_type MyISAM thread_cache_size 128 thread_stack 262144 time_format %H:%i:%s time_zone SYSTEM timed_mutexes OFF tmp_table_size 33554432 tmpdir /tmp/ transaction_alloc_block_size 8192 transaction_prealloc_size 4096 tx_isolation REPEATABLE-READ updatable_views_with_limit YES version 5.0.91-community-log version_comment MySQL Community Edition (GPL) version_compile_machine x86_64 version_compile_os unknown-linux-gnu wait_timeout 100 Code (markup): Now let me tell you lil about my server:: This is a dedicated server Linux Based CGI/FastCGI PHP version 5.3.3 curl enabled mysql version 5.0.91 xcache enabled cpu: Intel(R) Core(TM)2 Duo CPU E7400 @ 2.80GHz memory: 4gig drive: 160gig sata ----------------- Can you please tell me what changes should i need to make ? or do you need more info from me to figure out the fix ? I seriously do need help here.. Even now i m received complains from users for being forum to slow or seeing weird errors.. one of the common problem at user end is that last post (reply) does not place at the bottom of post. It always become a random post.. Please Advice. Thank You