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Problem with Mysql configuration, lags the server (1 reply)

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Hello!

I have a MySQL and Apache 2/php server with just 3 databases. I want to optimize the server to have max performance for my web systems, right now it timeout all the time and it's painfully slow (to the limit of no navigation). Sometimes I enter in my server and there's hundreds of MYSQL childs just stopped and lagging the server, after I restart mysql everything works fine, but I obviously have some problem with the configuration.
I get "Unable to connect to the MYSQL dabatase" all the time. (Being the info to connect ok).

If somebody can analize these information and help me to improve performance, please contribute.

Something is terrible wrong with the configuration, I get errors of Mysql timeout and Apache takes years to load.

I have the connection setting set to 400.


The server configuration is:
============================
Intel Quad Core, 2GB RAM, 500GB SATA running Debian


MYSQL
============================
Each mysql child takes 187M Virt, 100M Res

Variable name Current value

auto_increment_increment 1

auto_increment_offset 1

automatic_sp_privileges ON
back_log 50
basedir /usr/
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_general_ci

collation_server latin1_general_ci

completion_type 0

concurrent_insert 1
connect_timeout 250
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 10

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_crypt YES

have_csv YES

have_dynamic_loading YES

have_example_engine NO

have_federated_engine YES

have_geometry YES

have_innodb YES

have_isam NO

have_merge_engine YES

have_ndbcluster DISABLED

have_openssl DISABLED

have_ssl DISABLED

have_query_cache YES

have_raid NO

have_rtree_keys YES

have_symlink YES

hostname ithaki.net

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_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 100
join_buffer_size 131072
key_buffer_size 33554432
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 1
long_query_time 10

low_priority_updates OFF

lower_case_file_system OFF
lower_case_table_names 0
max_allowed_packet 33553408
max_binlog_cache_size 4294967295
max_binlog_size 104857600
max_connect_errors 10
max_connections 500
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 4294967295
max_sort_length 1024
max_sp_recursion_depth 0
max_tmp_tables 32
max_user_connections 200
max_write_lock_count 4294967295
multi_range_count 256
myisam_data_pointer_size 6
myisam_max_sort_file_size 2147483647

myisam_recover_options BACKUP
myisam_repair_threads 1
myisam_sort_buffer_size 8388608
myisam_stats_method nulls_unequal

ndb_autoincrement_prefetch_sz 32
ndb_force_send ON
ndb_use_exact_count ON
ndb_use_transactions ON

ndb_cache_check_time 0

ndb_connectstring
net_buffer_length 16384
net_read_timeout 30
net_retry_count 10
net_write_timeout 60
new OFF

old_passwords OFF
open_files_limit 1024
optimizer_prune_level 1
optimizer_search_depth 62

pid_file /var/run/mysqld/mysqld.pid
port 3306
preload_buffer_size 32768

profiling OFF
profiling_history_size 15

protocol_version 10
query_alloc_block_size 8192
query_cache_limit 3145728
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 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

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/run/mysqld/mysqld.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

system_time_zone PST
table_cache 64
table_lock_wait_timeout 50

table_type MyISAM
thread_cache_size 16
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 5.0.51a-24+lenny4

version_comment (Debian)

version_compile_machine i486

version_compile_os debian-linux-gnu
wait_timeout 250

APACHE
============================
Each apache child takes 50M Virt, 22M Res

Apache Configuration:
Httpd.conf
Timeout 150
KeepAlive Off


PHP
;;;;;;;;;;;;;;;;;;;
; Resource Limits ;
;;;;;;;;;;;;;;;;;;;

max_execution_time = 200 ; Maximum execution time of each script, in seconds
max_input_time = 200 ; Maximum amount of time each script may spend parsing request data
;max_input_nesting_level = 64 ; Maximum input variable nesting level
memory_limit = 128M ; Maximum amount of memory a script may consume (128MB)


What's so wrong with my config that the server is not working properly?
Thanks in advance.
Carla



Update: for example now The sites are unavailable and mysql has taken all the resources and pstree -p shows:

ââmysqld_safe(7160)ââ¬âlogger(7203)
â ââmysqld(7202)ââ¬â{mysqld}(7213)
â ââ{mysqld}(7214)
â ââ{mysqld}(7215)
â ââ{mysqld}(7216)
â ââ{mysqld}(7232)
â ââ{mysqld}(7233)
â ââ{mysqld}(7234)
â ââ{mysqld}(7235)
â ââ{mysqld}(7289)
â ââ{mysqld}(7290)
â ââ{mysqld}(7297)
â ââ{mysqld}(7298)
â ââ{mysqld}(7300)
â ââ{mysqld}(7304)
â ââ{mysqld}(7306)
â ââ{mysqld}(7309)
â ââ{mysqld}(7314)
â ââ{mysqld}(7326)
â ââ{mysqld}(7427)
â ââ{mysqld}(7428)
â ââ{mysqld}(7429)
â ââ{mysqld}(7514)
â ââ{mysqld}(7521)
â ââ{mysqld}(7533)
â ââ{mysqld}(7549)
â ââ{mysqld}(7550)
â ââ{mysqld}(7557)
â ââ{mysqld}(7569)
â ââ{mysqld}(7571)
â ââ{mysqld}(7592)
â ââ{mysqld}(7609)
â ââ{mysqld}(7618)
â ââ{mysqld}(7620)
â ââ{mysqld}(7629)
â ââ{mysqld}(7641)
â ââ{mysqld}(7650)
â ââ{mysqld}(7657)
â ââ{mysqld}(7850)
â ââ{mysqld}(7982)
â ââ{mysqld}(8345)
â ââ{mysqld}(8347)
â ââ{mysqld}(8523)
â ââ{mysqld}(8547)
â ââ{mysqld}(8548)
â ââ{mysqld}(8586)
â ââ{mysqld}(8727)
â ââ{mysqld}(8731)
â ââ{mysqld}(8734)
â ââ{mysqld}(8735)
â ââ{mysqld}(8795)
â ââ{mysqld}(8826)
â ââ{mysqld}(8830)
â ââ{mysqld}(9024)
â ââ{mysqld}(9025)
â ââ{mysqld}(9027)
â ââ{mysqld}(9090)
â ââ{mysqld}(9098)
â ââ{mysqld}(9103)
â ââ{mysqld}(9119)
â ââ{mysqld}(9123)
â ââ{mysqld}(9430)
â ââ{mysqld}(9434)
â ââ{mysqld}(9438)
â ââ{mysqld}(9447)
â ââ{mysqld}(9452)
â ââ{mysqld}(9455)
â ââ{mysqld}(9458)
â ââ{mysqld}(9473)
â ââ{mysqld}(9482)
â ââ{mysqld}(9509)
â ââ{mysqld}(9512)
â ââ{mysqld}(9578)
â ââ{mysqld}(9579)
â ââ{mysqld}(9580)
â ââ{mysqld}(9586)
â ââ{mysqld}(9590)
â ââ{mysqld}(9609)
â ââ{mysqld}(9635)
â ââ{mysqld}(9639)
â ââ{mysqld}(9651)
â ââ{mysqld}(10234)
â ââ{mysqld}(10513)
â ââ{mysqld}(10514)
â ââ{mysqld}(10516)
â ââ{mysqld}(10524)
â ââ{mysqld}(10610)
â ââ{mysqld}(10611)
â ââ{mysqld}(10617)
â ââ{mysqld}(10618)
â ââ{mysqld}(10619)
â ââ{mysqld}(10654)
â ââ{mysqld}(10671)
â ââ{mysqld}(10678)
â ââ{mysqld}(11140)
â ââ{mysqld}(11141)
â ââ{mysqld}(11255)
â ââ{mysqld}(11335)
â ââ{mysqld}(11379)
â ââ{mysqld}(11391)
â ââ{mysqld}(11440)
â ââ{mysqld}(11523)
â ââ{mysqld}(11539)
â ââ{mysqld}(11840)
â ââ{mysqld}(11841)
â ââ{mysqld}(11842)
â ââ{mysqld}(11843)
â ââ{mysqld}(11844)
â ââ{mysqld}(11845)
â ââ{mysqld}(11846)
â ââ{mysqld}(11847)
â ââ{mysqld}(11848)
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â ââ{mysqld}(11850)
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â ââ{mysqld}(11852)
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â ââ{mysqld}(11855)
â ââ{mysqld}(11856)
â ââ{mysqld}(11857)
â ââ{mysqld}(11858)
â ââ{mysqld}(11859)
â ââ{mysqld}(11869)
â ââ{mysqld}(11870)
â ââ{mysqld}(11871)
â ââ{mysqld}(11872)
â ââ{mysqld}(11873)
â ââ{mysqld}(11874)
â ââ{mysqld}(11875)
â ââ{mysqld}(11876)
â ââ{mysqld}(11880)
â ââ{mysqld}(11881)
â ââ{mysqld}(11888)
â ââ{mysqld}(11899)
â ââ{mysqld}(11915)
â ââ{mysqld}(11916)
â ââ{mysqld}(12181)
â ââ{mysqld}(12182)
â ââ{mysqld}(12202)
â ââ{mysqld}(12203)

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