Thread: System Performance

Originally Posted by Captain_Rightfoot

Would it be possible/worthwhile splitting the webserver onto another machine from the DB server?

That's why he's getting an extra box - to split the web and Database serving

There's only so much you can tune with the MySQL setup as well - especially when it's a pre-packages program like this forum software...

a little light reading......

open to any suggestions .....

MySQL Variables
Variable_name Value
back_log 50
basedir /usr/local/
bdb_cache_size 8388600
bdb_home
bdb_log_buffer_size 0
bdb_logdir
bdb_max_lock 10000
bdb_shared_data OFF
bdb_tmpdir
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/local/share/mysql/charsets/
collation_connection latin1_swedish_ci
collation_database latin1_swedish_ci
collation_server latin1_swedish_ci
concurrent_insert ON
connect_timeout 5
datadir /var/db/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 DISABLED
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 NO
have_ndbcluster NO
have_merge_engine YES
have_openssl NO
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 2617344
key_buffer_size 8388600
key_cache_age_threshold 300
key_cache_block_size 1024
key_cache_division_limit 100
language /usr/local/share/mysql/english/
large_files_support ON
lc_time_names en_US
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 5
low_priority_updates ON
lower_case_file_system OFF
lower_case_table_names 0
max_allowed_packet 1048576
max_binlog_cache_size 4294967295
max_binlog_size 1073741824
max_connect_errors 10
max_connections 256
max_delayed_threads 20
max_error_count 64
max_heap_table_size 16777216
max_insert_delayed_threads 20
max_join_size 4294967295
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_tmp_tables 32
max_user_connections 0
max_write_lock_count 4294967295
myisam_data_pointer_size 4
myisam_max_extra_sort_file_size 2147483648
myisam_max_sort_file_size 2147483647
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 1000000
net_write_timeout 60
new OFF
old_passwords OFF
open_files_limit 11095
pid_file /var/db/mysql/www.aulro.com.pid
port 3306
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 49999872
query_cache_type ON
query_cache_wlock_invalidate OFF
query_prealloc_size 8192
range_alloc_block_size 2048
read_buffer_size 2617344
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 /tmp/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 EST
table_cache 1024
table_type MyISAM
thread_cache_size 56
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 4.1.21
version_bdb Sleepycat Software: Berkeley DB 4.1.24: (July 19, 2006)
version_comment FreeBSD port: mysql-server-4.1.21
version_compile_machine i386
version_compile_os portbld-freebsd6.2
wait_timeout 28800

Uptime = 4 days 0 hrs 32 min 27 sec
Avg. qps = 51
Total Questions = 17735332
Threads Connected = 1



Server has been running for over 48hrs.
It should be safe to follow these recommendations

To find out more information on how each of these
runtime variables effects performance visit:
MySQL :: MySQL 3.23, 4.0, 4.1 Reference Manual :: 5.1.3 System Variables
Visit MySQL :: MySQL Enterprise Advisors
for info about MySQL's Enterprise Monitoring and Advisory Service

SLOW QUERIES
The slow query log is NOT enabled.
Current long_query_time = 5 sec.
You have 2390 out of 17735350 that take longer than 5 sec. to complete
Your long_query_time seems to be fine

BINARY UPDATE LOG
The binary update log is NOT enabled.
You will not be able to do point in time recovery
See MySQL :: MySQL 3.23, 4.0, 4.1 Reference Manual :: 6.3 Point-in-Time Recovery

WORKER THREADS
Current thread_cache_size = 56
Current threads_cached = 55
Current threads_per_sec = 0
Historic threads_per_sec = 0
Your thread_cache_size is fine

MAX CONNECTIONS
Current max_connections = 256
Current threads_connected = 1
Historic max_used_connections = 90
The number of used connections is 35% of the configured maximum.
Your max_connections variable seems to be fine.

MEMORY USAGE
Max Memory Ever Allocated : 734 M
Configured Max Per-thread Buffers : 1 G
Configured Max Global Buffers : 65 M
Configured Max Memory Limit : 1 G
Physical Memory : 2.99 G
Max memory limit seem to be within acceptable norms

KEY BUFFER
Current MyISAM index space = 1 M
Current key_buffer_size = 7 M
Key cache miss rate is 1 : 6346
Key buffer fill ratio = 100.00 %
Your key_buffer_size seems to be fine

QUERY CACHE
Query cache is enabled
Current query_cache_size = 47 M
Current query_cache_used = 12 M
Current query_cache_limit = 1 M
Current Query cache Memory fill ratio = 27.00 %
Current query_cache_min_res_unit = 4 K
MySQL won't cache query results that are larger than query_cache_limit in size

SORT OPERATIONS
Current sort_buffer_size = 2 M
Current read_rnd_buffer_size = 256 K
Sort buffer seems to be fine

JOINS
Current join_buffer_size = 2.50 M
You have had 803 queries where a join could not use an index properly
You should enable "log-queries-not-using-indexes"
Then look for non indexed joins in the slow query log.
If you are unable to optimize your queries you may want to increase your
join_buffer_size to accommodate larger joins in one pass.

Note! This script will still suggest raising the join_buffer_size when
ANY joins not using indexes are found.

OPEN FILES LIMIT
Current open_files_limit = 11095 files
The open_files_limit should typically be set to at least 2x-3x
that of table_cache if you have heavy MyISAM usage.
Your open_files_limit value seems to be fine

TABLE CACHE
Current table_cache value = 1024 tables
You have a total of 451 tables
You have 655 open tables.
The table_cache value seems to be fine

TEMP TABLES
Current max_heap_table_size = 16 M
Current tmp_table_size = 32 M
Of 48291 temp tables, 3% were created on disk
Effective in-memory tmp_table_size is limited to max_heap_table_size.
Created disk tmp tables ratio seems fine

TABLE SCANS
Current read_buffer_size = 2 M
Current table scan ratio = 464 : 1
read_buffer_size seems to be fine

TABLE LOCKING
Current Lock Wait ratio = 1 : 4038
You may benefit from selective use of InnoDB.

-------- Performance Metrics -------------------------------------------------
[--] Up for: 4d 0h 34m 47s (17M q [51.015 qps], 661K conn, TX: 4B, RX: 558M)
[--] Reads / Writes: 84% / 16%
[--] Total buffers: 81.7M global + 7.4M per thread (256 max threads)
[OK] Maximum possible memory usage: 1.9G (64% of installed RAM)
[OK] Slow queries: 0% (2K/17M)
[OK] Highest usage of available connections: 35% (90/256)
[OK] Key buffer size / total MyISAM indexes: 8.0M/1.8M
[OK] Key buffer hit rate: 100.0% (8B cached / 1M reads)
[OK] Query cache efficiency: 25.6% (2M cached / 9M selects)
[!!] Query cache prunes per day: 26913
[OK] Sorts requiring temporary tables: 1% (97K temp sorts / 5M sorts)
[OK] Temporary tables created on disk: 3% (1K on disk / 50K total)
[OK] Thread cache hit rate: 99% (169 created / 661K connections)
[!!] Table cache hit rate: 0% (655 open / 171K opened)
[OK] Open file limit used: 9% (1K/11K)
[OK] Table locks acquired immediately: 99% (9M immediate / 9M locks)

-------- Recommendations -----------------------------------------------------
General recommendations:
Run OPTIMIZE TABLE to defragment tables for better performance
Enable the slow query log to troubleshoot bad queries
Increase table_cache gradually to avoid file descriptor limits
Variables to adjust:
query_cache_size (> 47M)
table_cache (> 1024)