10 odpowiedzi na ten temat

[Kamil01]

Witam wszystkich serdecznie, od przeszlo miesiąca może dłużej mam problem z serwerem mysql, a mianowicie jego obciązeniem.... Codziennie bynajmiej raz serwer mysql wywala na kazdym moim serwisie max users connections(parametr ustawiony dużo na zapas) wywali taki bład i serwer zaczyna jechac po swapie.... ramu mam dośc dużo wolnego więc nie wiem w czym może być problem... Bardzo proszę o pomoc, będe wdzięczny. Jak coś potrzebne to pisac





Pozdrawiam
muchakk

[r.s]

Optymalizacja... http://forum.ovh.pl/...hread.php?t=614 - przeczytaj sobie conieco :-) Może również xcache?

[Kamil01]

mam zainstalowany eaccelerator mysql-zoptymalizowany, bynajmiej tak mi się wydaje...

[bellerofont]

muchakk, o 12.06.2007, 15:38, powiedział:

mysql-zoptymalizowany, bynajmiej tak mi się wydaje...

mysql -u root -p --batch -e "show variables"

?

[Kamil01]

Proszę bardzo:

Cytuj

host6:~# mysql -u root -p --batch -e "show variables"
Enter password:
Variable_name Value
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 latin2
character_set_results latin1
character_set_server latin2
character_set_system utf8
character_sets_dir /usr/share/mysql/charsets/
collation_connection latin1_swedish_ci
collation_database latin2_general_ci
collation_server latin2_general_ci
concurrent_insert ON
connect_timeout 5
datadir /hallo/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
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 NO
have_compress YES
have_crypt YES
have_csv YES
have_example_engine NO
have_geometry YES
have_innodb YES
have_isam YES
have_ndbcluster DISABLED
have_openssl NO
have_query_cache YES
have_raid YES
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_data_file_path ibdata1:10M:autoextend
innodb_data_home_dir
innodb_fast_shutdown ON
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_table_locks ON
innodb_thread_concurrency 8
interactive_timeout 28800
join_buffer_size 131072
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
license GPL
local_infile ON
locked_in_memory OFF
log OFF
log_bin OFF
log_error
log_slave_updates OFF
log_slow_queries OFF
log_update 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 1047552
max_binlog_cache_size 18446744073709551615
max_binlog_size 104857600
max_connect_errors 9999
max_connections 400
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_relay_log_size 0
max_seeks_for_key 18446744073709551615
max_sort_length 1024
max_tmp_tables 32
max_user_connections 20
max_write_lock_count 18446744073709551615
myisam_data_pointer_size 4
myisam_max_extra_sort_file_size 2147483648
myisam_max_sort_file_size 9223372036854775807
myisam_recover_options OFF
myisam_repair_threads 1
myisam_sort_buffer_size 8388608
ndb_autoincrement_prefetch_sz 32
ndb_force_send ON
ndb_use_exact_count ON
ndb_use_transactions ON
net_buffer_length 16384
net_read_timeout 30
net_retry_count 10
net_write_timeout 60
new OFF
old_passwords ON
open_files_limit 2010
pid_file /var/run/mysqld/mysqld.pid
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 16777216
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_net_timeout 3600
slave_transaction_retries 0
slow_launch_time 2
socket /var/run/mysqld/mysqld.sock
sort_buffer_size 2097144
sql_mode
storage_engine MyISAM
sql_notes ON
sql_warnings ON
sync_binlog 0
sync_replication 0
sync_replication_slave_id 0
sync_replication_timeout 0
sync_frm ON
system_time_zone CEST
table_cache 64
table_type MyISAM
thread_cache_size 0
thread_stack 131072
time_format %H:%i:%s
time_zone SYSTEM
tmp_table_size 33554432
tmpdir /tmp
transaction_alloc_block_size 8192
transaction_prealloc_size 4096
tx_isolation REPEATABLE-READ
version 4.1.11-Debian_4sarge7
version_comment Source distribution
version_compile_machine x86_64
version_compile_os pc-linux-gnu
wait_timeout 28800
host6:~#

[bellerofont]

1. Niezły mix of collations
2. Max user connections na 20? ( Masz tam same strony firmowe? )
3. 64 dla table cache? ( z pewnością używasz większej ilości tabel w jednej jednostce czasu )
4. Masz dużo wolnego RAMu, więc dlaczego tak mało pamięci przeznaczyłeś na cache kluczy i selectow?
5. open_files_limit na 2010? ( dziwna wartość jak na paczkę Debiana )
6. Loguj slow queries, to nie boli, a pomaga.
n. Coś się jeszcze na pewno znajdzie. Googluj dalej...

[Kamil01]

sow queries logowalem-wylaczylem....
max users connections mam na 40

jak zwiekszyc te rzeczy co podalwales? w configu mysql-a? nie znam sie dobrze na serwerze mysql...

[r.s]

my.cnf albo via set variable w konsoli mysqla.

[zrio]

To normalnie rządzi :

character_set_results latin1
character_set_server latin2
character_set_system utf8

[Kamil01]

w my.cnf to zahaszowalem a nie wiem dlaczego tutaj pokazuje...

[r.s]

Ponieważ jest to default :-)