mysqldump掛起服務器

Question

我有一個問題。我在我的一臺服務器（eAthena）上運行開源遊戲軟件，他們使用MySQL作爲他們的首選數據庫。然而，每一次我運行mysqldump的

mysqldump -u backup -p*** eathena > test-backup.sql

它結束了掛在服務器上。 eAthena軟件掛起，並在完成後關閉。這是一個尺寸問題？看到數據庫是如何4.7gb，我不知道應該責怪什麼。有一些類型的替代我的mysqldump？

我正在運行CentOS 6 64bit，MySQL版本5.1.52。

Answer 1

看來你的mysql安裝內存不足了。請檢查/etc/my.cnf或/etc/mysql/my.cnf（或在CentOS上的任何位置）。

增加table_cache和key_buffer_size。請參閱mysql安裝附帶的confs示例：my-huge.cnf’, my-large.cnf'，my-medium.cnf’, and my-small.cnf'。與此對比您confs：

[mysqld] 
# Reduced to 200 as memory will not be enough for 500 connections. 
# memory=key_buffer+sort_buffer_size+read_buffer_size)*max_connections 
# which is now: 64 + (1 + 1) * 200 = 464 MB 
# max_connections = approx. MaxClients setting in httpd.conf file 
# Default set to 100. 
max_connections = 100 
max_allowed_packet = 1M 
max_connect_errors = 10 
key_buffer = 512M # 128M for 1GB, 256M for 2GB, 512 for 4GB 
join_buffer_size = 4M # 1M for 1GB, 2M for 2GB, 4M for 4GB 
read_buffer_size = 4M # 1M for 1GB, 2M for 2GB, 4M for 4GB 
sort_buffer_size = 2M # 1M for 1GB, 2M for 2GB, 4M for 4GB 
# myisam_sort_buffer_size used for ALTER, OPTIMIZE, REPAIR TABLE commands. 
myisam_sort_buffer_size = 32M 
# Checked opened tables and adjusted accordingly after running for a while. 
table_cache = 1024 
# thread_concurrency = 2 * (no. of CPU) 
thread_concurrency=4 
thread_cache_size = 286 
# log slow queries is a must. Many queries that take more than 2 seconds. 
# If so, then your tables need enhancement. 
log_slow_queries=/var/log/mysqld.slow.log 
long_query_time=2 
# Reduced wait_timeout to prevent idle clients holding connections. 
wait_timeout = 10 
connect_timeout = 10 
interactive_timeout = 10 
# Enable it for vast improvement and it may be all you need to tweak. 
query_cache_limit = 1M 
query_cache_size = 128M 
query_cache_type = 1 
[mysqld_safe] 
open_files_limit = 8192 
[mysqldump] 
quick 
max_allowed_packet = 16M 
[myisamchk] 
key_buffer = 256M # 64M for 1GB, 128M for 2GB, 256 for 4GB 
sort_buffer = 256M # 64M for 1GB, 128M for 2GB, 256 for 4GB 
read_buffer = 64M # 16M for 1GB, 32M for 2GB, 64M for 4GB 
write_buffer = 64M # 16M for 1GB, 32M for 2GB, 64M for 4GB 
[mysqlhotcopy] 
interactive-timeout 

不要忘記之前重新啓動MySQL服務器再試