mysqltuner result help/info Table cache hit rate: 0%

Schwibby

Member
Apr 4, 2013
20
0
1
cPanel Access Level
DataCenter Provider
hello ! i've read rthe forum and see the mysql video but not understand very well....

can i ask if my.cnf is ok for my server ? i've shared hosting server 6gb ram 6vcpu xeon e5504 2.2ghz

this is my.cnf

Code:
[email protected] [/usr/local/cpanel/3rdparty/mysqltuner]# cat /etc/my.cnf
[mysqld]
set-variable = max_connections=200
query_cache_type=1
query_cache_size=64M
query_cache_limit=1M
sort_buffer_size=2M
read_rnd_buffer_size=512K
tmp_table_size=64M
max_heap_table_size=64M
thread_cache_size=24
key_buffer_size=16M
table_cache=192
join_buffer_size=2M
log-slow-queries=/var/lib/mysql/slow.log
innodb_buffer_pool_size=80M
innodb_file_per_table=1
open_files_limit=13460
max_allowed_packet=128M
and this the result of mysql tuner

Code:
-------- General Statistics --------------------------------------------------
[--] Skipped version check for MySQLTuner script
[OK] Currently running supported MySQL version 5.1.69-cll
[OK] Operating on 64-bit architecture

-------- Storage Engine Statistics -------------------------------------------
[--] Status: +Archive -BDB -Federated +InnoDB -ISAM -NDBCluster
[--] Data in MyISAM tables: 461M (Tables: 2032)
[--] Data in InnoDB tables: 69M (Tables: 239)
[!!] Total fragmented tables: 119

-------- Performance Metrics -------------------------------------------------
[--] Up for: 1d 0h 32m 26s (7M q [82.111 qps], 118K conn, TX: 25B, RX: 1B)
[--] Reads / Writes: 86% / 14%
[--] Total buffers: 226.0M global + 4.9M per thread (200 max threads)
[OK] Maximum possible memory usage: 1.2G (20% of installed RAM)
[OK] Slow queries: 0% (2/7M)
[OK] Highest usage of available connections: 10% (20/200)
[OK] Key buffer size / total MyISAM indexes: 16.0M/130.2M
[OK] Key buffer hit rate: 99.3% (131M cached / 917K reads)
[OK] Query cache efficiency: 82.3% (5M cached / 6M selects)
[!!] Query cache prunes per day: 474342
[OK] Sorts requiring temporary tables: 0% (1 temp sorts / 183K sorts)
[!!] Joins performed without indexes: 1211
[!!] Temporary tables created on disk: 33% (75K on disk / 222K total)
[OK] Thread cache hit rate: 99% (20 created / 118K connections)
[!!] Table cache hit rate: 0% (192 open / 1M opened)
[OK] Open file limit used: 2% (367/13K)
[OK] Table locks acquired immediately: 99% (1M immediate / 1M locks)
[OK] InnoDB data size / buffer pool: 69.1M/80.0M

-------- Recommendations -----------------------------------------------------
General recommendations:
    Run OPTIMIZE TABLE to defragment tables for better performance
    Adjust your join queries to always utilize indexes
    When making adjustments, make tmp_table_size/max_heap_table_size equal
    Reduce your SELECT DISTINCT queries without LIMIT clauses
    Increase table_cache gradually to avoid file descriptor limits
Variables to adjust:
    query_cache_size (> 64M)
    join_buffer_size (> 2.0M, or always use indexes with joins)
    tmp_table_size (> 64M)
    max_heap_table_size (> 64M)
    table_cache (> 192)
yesterday i've adjust setting but the result are the same... can i modyfy add or delete something ??

thanks
 

thinkbot

Well-Known Member
Oct 30, 2012
326
1
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cPanel Access Level
Root Administrator
Code:
[mysqld]

wait_timeout = 30
connect_timeout = 1
local-infile=0

open_files_limit=20000

max_connections=200

key_buffer_size = 1G
max_allowed_packet=20M

query_cache_size=30M
query_cache_limit=1M
tmp_table_size=50M
max_heap_table_size=50M
thread_cache_size=50

table_open_cache = 3000
table_definition_cache = 2000

slow_query_log=1
slow_query_log_file=mysql-slow.log
long_query_time=0.1
log-queries-not-using-indexes

sort_buffer_size=256K
join_buffer_size=2M
read_rnd_buffer_size=4M

max_write_lock_count = 10
concurrent_insert=2


innodb_buffer_pool_size=200M
innodb_file_per_table=1
innodb_buffer_pool_instances = 4
innodb_flush_log_at_trx_commit = 2

table cache hit rate 0% means that your script is creating many temp tables and you need to review your queries

wget http://percona.com/get/pt-query-digest
chmod +x pt-query-digest
./pt-query-digest /var/lib/mysql/mysql-slow.log > slow.txt

or for old slow file
./pt-query-digest /var/lib/mysql/slow.log > slow.txt
 

Schwibby

Member
Apr 4, 2013
20
0
1
cPanel Access Level
DataCenter Provider
hello thinkbot,

first of all thank you very much for the quick response.

the code you have posted is to replace the mine to give to make a test?

the pt-query-digest is a tool to test the slow query ?