GAO-07-299, Aviation Security: TSAs Staffing Allocation Model Is ::
to augment local TSO staff during periods of unusually high passenger volume. request and sending an optimization team to assess the validity of the request,
http://www.gao.gov/htext/d07299.htmlHOME |
Hi Everyone,
I run a forum with 27,000 users. We recently upgraded from Fedora
1 to Fedora 6 (and our VBulletin to 3.6.4) and started to have problems. We have tried recently CentOS 4.3. Under Fedora 1, everything ran perfectly, but now things are much different.
The forums will run smoothly for periods of time then suddenly become
busy. During this time he server will exceed a load of 10, 40 even 85+
Currently the system is a dual core 64 bit 3 Ghz Xeon processor with 1
gig of RAM.
We've tried turning on and turning off options such as keep alive and
persistent connections. We've tried several different Mysql
optimizations, still, to no avail.
We are running:
Apache: 2.0.52
Mysql: 4.1.20-log
PHP: 4.3.9
VBulletin 3.6.4
on linux kernel: 2.6.9-42.0.8.ELsmp #1 SMP
Disks are 15k SCSI in a RAID 5 using the MegaRAID_mbox driver for the
LSI Logic / Symbios Logic MegaRAID (rev 02) controller
This is a dedicated box. No other v-hosts or services are running
Full information below:
1. Is this on dedicated or shared virual server. If shared, how many
sites share this server (ask web host if needed)
Dedicated
2. your server specs. For example:
cpu speed/type single or dual cpus): dual Xeon 3ghz 64 bit
how much memory installed: 512mb ram
hard drive type/configuration: SCSI 15k RAID 5 LSI MegaRAID Control
(megaraid_mbox driver)
linux distributor or windows version: CentOS 4.3 2.6.9-42.0.8.ELsmp #1
SMP
apache/IIS version: apache 2.0.52
PHP version: php 4.3.9
MySQL version: 4.1.20-log
3. what version of vB are you running ? 3.6.4
4. if you use mysql 4.x instead of mysql 3.23.x, do you have any innodb
type databases/tables on your server ? No
5. if possible how mysql was compiled/installed: RPM
6. your top stats
top - 21:09:03 up 11:11, 3 users, load average: 10.85, 7.34, 15.71
Tasks: 138 total, 1 running, 137 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.1% us, 0.0% sy, 0.0% ni, 0.0% id, 99.7% wa, 0.0% hi,
0.2% si
Mem: 1024540k total, 1008448k used, 16092k free, 4632k buffers
Swap: 2031608k total, 8184k used, 2023424k free, 208596k cached
7. your mysql configuration variables located at /etc/my.cnf or c:
my.cnf or my.ini so post the contents inside of my.cnf (minus any
passwords of course).
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
# Default to using old password format for compatibility with mysql 3.x
# clients (those using the mysqlclient10 compatibility package).
old_passwords=1
log-slow-queries = /var/log/mysql_slow_queries.log
skip-locking
max_connections = 500
key_buffer = 64M
myisam_sort_buffer_size = 64M
join_buffer_size = 1M
read_buffer_size = 1M
sort_buffer_size = 2M
table_cache = 1024
thread_cache_size = 64
wait_timeout = 1800
connect_timeout = 10
max_allowed_packet = 16M
max_connect_errors = 10
query_cache_limit = 2M
query_cache_size = 32M
query_cache_type = 1
thread_concurrency=8
skip-innodb
[mysql.server]
user=mysql
basedir=/var/lib
[mysqld_safe]
err-log=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
open-files-limit=8192
[myisamchk]
key_buffer = 256M
sort_buffer = 256M
read_buffer = 32M
write_buffer = 32M
8. MySQL stats from ssh telnet as root user type:
+---------------------------------+--------------------------------------------------------+
Variable_name Value
rFactor Demo (Playable) rFactor v1.150 Download File on FileFront::
If you use high, please check your setting as it may now be set to medium. rolling over or when touching unusually high curbing) and Immovable is usually
http://files.filefront.com/rFactor+v1150/;5342219;;/fileinfo.htmlHOME |
+---------------------------------+--------------------------------------------------------+
back_log 50
basedir /usr/
bdb_cache_size 8388600
bdb_home /var/lib/mysql/
bdb_log_buffer_size 524288
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_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
concurrent_insert ON
connect_timeout 10
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
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_example_engine NO
have_geometry YES
have_innodb DISABLED
have_isam YES
have_ndbcluster NO
have_openssl YES
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_data_file_path
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 1044480
key_buffer_size 67108864
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 ON
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 16776192
max_binlog_cache_size 18446744073709551615
max_binlog_size 1073741824
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 18446744073709551615
max_sort_length 1024
max_tmp_tables 32
max_user_connections 0
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 67108864
BIONET National Computer Resource for Molecular Biology Grant No ::
kept at IntelliGenetics and are available upon request if needed. Please see the electronic mail access to high-speed database searches on our
http://profiles.nlm.nih.gov/BB/G/H/C/R/_/bbghcr.ocrHOME |
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 8192
pid_file /var/run/mysqld/mysqld.pid
port 3306
preload_buffer_size 32768
prepared_stmt_count 0
protocol_version 10
query_alloc_block_size 8192
query_cache_limit 2097152
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 1044480
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/lib/mysql/mysql.sock
sort_buffer_size 2097144
sql_mode
sql_notes ON
sql_warnings ON
storage_engine MyISAM
sync_binlog 0
sync_frm ON
sync_replication 0
sync_replication_slave_id 0
sync_replication_timeout 0
system_time_zone CST
table_cache 1024
table_type MyISAM
thread_cache_size 64
thread_stack 196608
time_format %H:%i:%s
time_zone SYSTEM
tmp_table_size 33554432
tmpdir
transaction_alloc_block_size 8192
transaction_prealloc_size 4096
tx_isolation REPEATABLE-READ
version 4.1.20-log
version_bdb Sleepycat Software: Berkeley DB
4.1.24: (May 24, 2006)
version_comment Source distribution
version_compile_machine x86_64
version_compile_os redhat-linux-gnu
wait_timeout 1800
+---------------------------------+--------------------------------------------------------+
+--------------------------------+-----------+
Variable_name Value
+--------------------------------+-----------+
Aborted_clients 0
Aborted_connects 0
Binlog_cache_disk_use 0
Binlog_cache_use 0
Bytes_received 6820420
Bytes_sent 534247884
Com_admin_commands 1
Com_alter_db 0
Com_alter_table 0
Com_analyze 0
Com_backup_table 0
Com_begin 0
Com_change_db 1877
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_dealloc_sql 0
Com_delete 64
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 583
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 51
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 7088
Com_set_option 8
Com_show_binlog_events 0
Com_show_binlogs 1
Com_show_charsets 4
Com_show_collations 4
Com_show_column_types 0
Com_show_create_db 0
Com_show_create_table 0
Com_show_databases 3
Com_show_errors 0
Com_show_fields 0
Com_show_grants 1
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 10
Com_show_variables 11
Com_show_warnings 0
Com_slave_start 0
Com_slave_stop 0
Com_stmt_close 0
Com_stmt_execute 0
Com_stmt_prepare 0
Com_stmt_reset 0
Com_stmt_send_long_data 0
Com_truncate 0
Com_unlock_tables 0
Com_update 1818
Com_update_multi 0
Connections 1882
Created_tmp_disk_tables 7
Created_tmp_files 69
Created_tmp_tables 191
Delayed_errors 0
Delayed_insert_threads 0
Delayed_writes 0
Flush_commands 1
Handler_commit 0
Handler_delete 243
Handler_discover 0
Handler_read_first 1729
Handler_read_key 191440
Handler_read_next 2581356
Handler_read_prev 8889
Handler_read_rnd 2493
Handler_read_rnd_next 60666
Handler_rollback 0
Handler_update 1992
Handler_write 2122
Key_blocks_not_flushed 0
Key_blocks_unused 45636
Key_blocks_used 7949
Key_read_requests 785784
Key_reads 7954
Key_write_requests 455
Key_writes 372
Max_used_connections 73
Not_flushed_delayed_rows 0
Open_files 472
Open_streams 0
Open_tables 385
Opened_tables 391
Qcache_free_blocks 301
Qcache_free_memory 28005792
Qcache_hits 12522
Qcache_inserts 5447
Qcache_lowmem_prunes 0
Qcache_not_cached 1641
Qcache_queries_in_cache 761
Qcache_total_blocks 1945
Questions 25926
Rpl_status NULL
Select_full_join 2
Select_full_range_join 0
Select_range 2902
Select_range_check 0
Select_scan 374
Slave_open_temp_tables 0
Slave_retried_transactions 0
Slave_running OFF
Slow_launch_threads 0
Slow_queries 115
Sort_merge_passes 161
Sort_range 973
Sort_rows 2305245
Sort_scan 129
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 15641
Table_locks_waited 322
Threads_cached 62
Threads_connected 2
Threads_created 73
Threads_running 2
Uptime 1193
+--------------------------------+-----------+
Uptime: 1193 Threads: 2 Questions: 25927 Slow queries: 115 Opens:
391 Flush tables: 1 Open tables: 385 Queries per second avg: 21.733
mysqladmin Ver 8.41 Distrib 4.1.20, for redhat-linux-gnu on x86_64
(C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
This software comes with ABSOLUTELY NO WARRANTY. This is free software,
and you are welcome to modify and redistribute it under the GPL license
Server version 4.1.20-log
Protocol version 10
Connection Localhost via UNIX socket
UNIX socket /var/lib/mysql/mysql.sock
Uptime: 19 min 53 sec
Threads: 2 Questions: 25927 Slow queries: 115 Opens: 391 Flush
tables: 1 Open tables: 385 Queries per second avg: 21.733
mysqlreport:
MySQL 4.1.20-log uptime 0 0:31:4 Mon Feb 26 21:21:42 2007
__ Key __________________________________________________ _______________
Buffer used 8.89M of 64.00M %Used: 13.89
Current 20.56M %Usage: 32.13
Write ratio 0.879
Read ratio 0.008
__ Questions __________________________________________________ _________
Total 49.91k 26.8/s
QC Hits 24.73k 13.3/s %Total: 49.56
DMS 17.80k 9.5/s 35.66
Com_ 3.72k 2.0/s 7.45
COM_QUIT 3.67k 2.0/s 7.34
-Unknown 7 0.0/s 0.01
Slow 145 0.1/s 0.29 %DMS: 0.81
DMS 17.80k 9.5/s 35.66
SELECT 13.12k 7.0/s 26.28 73.69
UPDATE 3.42k 1.8/s 6.85 19.20
INSERT 1.07k 0.6/s 2.14 6.01
DELETE 115 0.1/s 0.23 0.65
REPLACE 81 0.0/s 0.16 0.46
Com_ 3.72k 2.0/s 7.45
change_db 3.66k 2.0/s 7.33
show_variab 18 0.0/s 0.04
show_tables 10 0.0/s 0.02
__ SELECT and Sort __________________________________________________ ___
Scan 654 0.4/s %SELECT: 4.99
Range 5.39k 2.9/s 41.12
Full join 2 0.0/s 0.02
Range check 0 0/s 0.00
Full rng join 0 0/s 0.00
Sort scan 204 0.1/s
Sort range 1.85k 1.0/s
Sort mrg pass 238 0.1/s
__ Query Cache __________________________________________________ _______
Memory usage 5.69M of 32.00M %Used: 17.78
Block Fragmnt 15.51%
Hits 24.73k 13.3/s
Inserts 10.01k 5.4/s
Insrt:Prune 10.01k:1 5.4/s
Hit:Insert 2.47:1
__ Table Locks __________________________________________________ _______
Waited 492 0.3/s %Total: 1.65
Immediate 29.28k 15.7/s
__ Tables __________________________________________________ ____________
Open 433 of 1024 %Cache: 42.29
Opened 439 0.2/s
__ Connections __________________________________________________ _______
Max used 73 of 500 %Max: 14.60
Total 3.67k 2.0/s
__ Created Temp __________________________________________________ ______
Disk table 19 0.0/s
Table 334 0.2/s
File 102 0.1/s
__ Threads __________________________________________________ ___________
Running 1 of 1
Cached 63 of 64 %Hit: 98.01
Created 73 0.0/s
Slow 0 0/s
__ Aborted __________________________________________________ ___________
Clients 0 0/s
Connects 5 0.0/s
__ Bytes __________________________________________________ _____________
Sent 1.03G 552.6k/s
Received 12.94M 6.9k/s
9. ???????????????
10 ???????????????
11. http://forums.screamandfly.com/phpinfo.php
12
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 15
StartServers 8
MinSpareServers 5
MaxSpareServers 20
ServerLimit 256
MaxClients 256
MaxRequestsPerChild 4000
Large files: no. Brand new install
13
Linux forums.screamandfly.com 2.6.9-42.0.8.ELsmp #1 SMP Tue Jan 30
12:18:01 EST 2007 x86_64 x86_64 x86_64 GNU/Linux
[root@forums log]# ulimit -aH
core file size (blocks, -c) unlimited
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
pending signals (-i) 1024
max locked memory (kbytes, -l) 32
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
stack size (kbytes, -s) unlimited
cpu time (seconds, -t) unlimited
max user processes (-u) 8191
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
[root@forums log]# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 3.00GHz
stepping : 1
cpu MHz : 2992.605
cache size : 1024 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall
nx lm pni monitor ds_cpl cid cx16 xtpr
bogomips : 5990.88
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 1
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 3.00GHz
stepping : 1
cpu MHz : 2992.605
cache size : 1024 KB
physical id : 3
siblings : 2
core id : 3
cpu cores : 1
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall
nx lm pni monitor ds_cpl cid cx16 xtpr
bogomips : 5984.23
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 2
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 3.00GHz
stepping : 1
cpu MHz : 2992.605
cache size : 1024 KB
physical id : 0
siblings : 2
core id : 0
cpu cores : 1
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall
nx lm pni monitor ds_cpl cid cx16 xtpr
bogomips : 5984.15
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:
processor : 3
vendor_id : GenuineIntel
cpu family : 15
model : 4
model name : Intel(R) Xeon(TM) CPU 3.00GHz
stepping : 1
cpu MHz : 2992.605
cache size : 1024 KB
physical id : 3
siblings : 2
core id : 3
cpu cores : 1
fpu : yes
fpu_exception : yes
cpuid level : 5
wp : yes
flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge
mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm syscall
nx lm pni monitor ds_cpl cid cx16 xtpr
bogomips : 5984.24
clflush size : 64
cache_alignment : 128
address sizes : 36 bits physical, 48 bits virtual
power management:
FC3 and above(which includes Centos 4.x since it's a stable fc3 branch) have weird apache load issues. While i am not seeing them there are too many reports of high loads with RH kernels for it to not exist.
Any help would really be appreciated :)
Thank you Eva and hescominsoon. All applied, and no difference. Server starts off fine, then loads up quickly and goes down. We tried different servers - everything it seems. I don't know what else to do.
at peak loads repost output for these 2 commands
top
mysqladmin -u root -p var ext ver > stats.txt
open the stats.txt file to copy and paste it's contents.
There's a new kernel out for Centos.
simpy run yum update and that should install the new kernel then reboot for it to take effect.
I am really curious if switching to first the new kernel above AND using the worker mpm would help him instead of prefork?
Try the following in this exact order. You can ignore any of the suggestions that you have already done.
1. Upgrade MySQL server to 4.1.22
2. Upgrade PHP to 4.4.4 and/or recompile PHP 4.4.4 after upgrading MySQL
3. Edit /etc/my.cnf and place the following mysql server settings in /etc/my.cnf and restart mysql server afterwards
[mysqld]
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
safe-show-database
old_passwords
back_log = 75
skip-innodb
max_connections = 500
key_buffer = 32M
myisam_sort_buffer_size = 64M
join_buffer_size = 1M
read_buffer_size = 1M
sort_buffer_size = 2M
table_cache = 1800
thread_cache_size = 384
wait_timeout = 35
connect_timeout = 10
tmp_table_size = 64M
max_heap_table_size = 64M
max_allowed_packet = 64M
max_connect_errors = 10
read_rnd_buffer_size = 524288
bulk_insert_buffer_size = 8M
query_cache_limit = 4M
query_cache_size = 48M
query_cache_type = 1
query_prealloc_size = 163840
query_alloc_block_size = 32768
default-storage-engine = MyISAM
[mysql.server]
user=mysql
basedir=/var/lib
[mysqld_safe]
err-log=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
nice = -5
open_files_limit = 8192
[mysqldump]
quick
max_allowed_packet = 16M
[myisamchk]
key_buffer = 64M
sort_buffer = 64M
read_buffer = 16M
write_buffer = 16M
[mysqlhotcopy]
interactive-timeout
4. Install APC Cache lastest version from http://pecl.php.net/package/APC.
5. If you just upgraded to vB 3.5.x/3.6.x try to disable these 4 options:
Admin CP -> vBulletin Options -> Forums Home Page Options -> Display Logged in Users?
Admin CP -> vBulletin Options -> Forum Display Options (forumdisplay) -> Show Users Browsing Forums
Admin CP -> vBulletin Options -> Thread Display Options -> Show Users Browsing Thread
Admin CP -> vBulletin Options -> Message Searching Options -> Automatic Similar Thread search
6. Edit httpd.conf values from
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 15
StartServers 8
MinSpareServers 5
MaxSpareServers 20
ServerLimit 256
MaxClients 256
MaxRequestsPerChild 4000
to
KeepAlive On
MaxKeepAliveRequests 100
KeepAliveTimeout 5
StartServers 10
MinSpareServers 10
MaxSpareServers 15
ServerLimit 256
MaxClients 150
MaxRequestsPerChild 1000
7. If you're using CentOS 4.x linxu operating system, then read http://www.vbulletin.com/forum/showthread.php?t=171071 about 2.6.9-42.0.3 and possible 2.6.9-42.0.8 issues and maybe need to downgrade smp kernel to 2.6.9.42.02 or change swap settings
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