Tuning-primer.sh

Aus VMS1 Tutorial

Wechseln zu: Navigation, Suche

Tuning-primer.sh ist ein Shell-Skript, dass Vorschläge zur Optimierung der MySQL-Server Konfiguration macht. Download unter: http://www.day32.com/MySQL/

Eine Beispielausgabe:

root@localhost:/etc/mysql# ./tuning-primer.sh

Using login values from ~/.my.cnf
- INITIAL LOGIN ATTEMPT FAILED -
Testing for stored webmin passwords:
Could not auto detect login info!
Found Sockets: /var/run/mysqld/mysqld.sock
Using: /var/run/mysqld/mysqld.sock
Would you like to provide a different socket?: [y/N] n
Do you have your login handy ? [y/N] : y
User: root
Password: **********

Would you like me to create a ~/.my.cnf file for you? [y/N] : n


-- MYSQL PERFORMANCE TUNING PRIMER --
- By: Matthew Montgomery -

MySQL Version 5.0.51a-24+lenny3 x86_64

Uptime = 98 days 1 hrs 4 min 16 sec
Avg. qps = 460
Total Questions = 3901947515
Threads Connected = 2

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:
http://dev.mysql.com/doc/refman/5.0/en/server-system-variables.html
Visit http://www.mysql.com/products/enterprise/advisors.html
for info about MySQL's Enterprise Monitoring and Advisory Service

SLOW QUERIES
The slow query log is NOT enabled.
Current long_query_time = 1 sec.
You have 564 out of 3901947584 that take longer than 1 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 http://dev.mysql.com/doc/refman/5.0/en/point-in-time-recovery.html

WORKER THREADS
Current thread_cache_size = 8
Current threads_cached = 6
Current threads_per_sec = 0
Historic threads_per_sec = 0
Your thread_cache_size is fine

MAX CONNECTIONS
Current max_connections = 100
Current threads_connected = 4
Historic max_used_connections = 90
The number of used connections is 90% of the configured maximum.
You should raise max_connections

INNODB STATUS
Current InnoDB index space = 0 bytes
Current InnoDB data space = 0 bytes
Current InnoDB buffer pool free = 96 %
Current innodb_buffer_pool_size = 8 M
Depending on how much space your innodb indexes take up it may be safe
to increase this value to up to 2 / 3 of total system memory

MEMORY USAGE
Max Memory Ever Allocated : 342 M
Configured Max Per-thread Buffers : 262 M
Configured Max Global Buffers : 106 M
Configured Max Memory Limit : 368 M
Physical Memory : 7.81 G
Max memory limit seem to be within acceptable norms

KEY BUFFER
Current MyISAM index space = 137 M
Current key_buffer_size = 64 M
Key cache miss rate is 1 : 8918
Key buffer free ratio = 81 %
Your key_buffer_size seems to be fine

QUERY CACHE
Query cache is enabled
Current query_cache_size = 32 M
Current query_cache_used = 6 M
Current query_cache_limit = 2 M
Current Query cache Memory fill ratio = 19.51 %
Current query_cache_min_res_unit = 4 K
Query Cache is 23 % fragmented
Run "FLUSH QUERY CACHE" periodically to defragment the query cache memory
If you have many small queries lower 'query_cache_min_res_unit' to reduce fragmentation.
Your query_cache_size seems to be too high.
Perhaps you can use these resources elsewhere

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 = 132.00 K
You have had 2271 queries where a join could not use an index properly
You have had 524 joins without keys that check for key usage after each row
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 = 1134 files
The open_files_limit should typically be set to at least 2x-3x
that of table_cache if you have heavy MyISAM usage.

You currently have open more than 75% of your open_files_limit
You should set a higher value for open_files_limit in my.cnf


TABLE CACHE
Current table_cache value = 512 tables
You have a total of 794 tables
You have 512 open tables.
Current table_cache hit rate is 0%
, while 100% of your table cache is in use
You should probably increase your table_cache

TEMP TABLES
Current max_heap_table_size = 64 M
Current tmp_table_size = 64 M
Of 3078892 temp tables, 0% were created on disk
Created disk tmp tables ratio seems fine

TABLE SCANS
Current read_buffer_size = 128 K
Current table scan ratio = 28 : 1
read_buffer_size seems to be fine

TABLE LOCKING
Current Lock Wait ratio = 1 : 211
You may benefit from selective use of InnoDB.
If you have long running SELECT's against MyISAM tables and perform
frequent updates consider setting 'low_priority_updates=1'
If you have a high concurrency of inserts on Dynamic row-length tables
consider setting 'concurrent_insert=2'.

Persönliche Werkzeuge