爲什麼,當我運行分析MySQL表時提示錯誤1040 - 連接太多
ANALYZE TABLE table_name_here
MySQL服務器啓動給予了這個錯誤:
1040 - 連接太多
我已經運行這個通過PHPMyAdmin btw ..
該表包含超過1500萬行數據。有沒有辦法來解決這個問題?
MySQLTuner結果:
-------- General Statistics --------------------------------------------------
[--] Skipped version check for MySQLTuner script
[OK] Currently running supported MySQL version 5.0.91-rs-log
[OK] Operating on 64-bit architecture
-------- Storage Engine Statistics -------------------------------------------
[--] Status: +Archive -BDB +Federated -InnoDB -ISAM -NDBCluster
[--] Data in MyISAM tables: 10G (Tables: 192)
[!!] Total fragmented tables: 14
-------- Security Recommendations -------------------------------------------
ERROR 1142 (42000) at line 1: SELECT command denied
[OK] All database users have passwords assigned
-------- Performance Metrics -------------------------------------------------
[--] Up for: 21m 37s (134K q [103.756 qps], 982 conn, TX: 267M, RX: 20M)
[--] Reads/Writes: 88%/12%
[--] Total buffers: 1.2G global + 22.2M per thread (120 max threads)
[!!] Maximum possible memory usage: 3.8G (99% of installed RAM)
[OK] Slow queries: 0% (4/134K)
[OK] Highest usage of available connections: 14% (17/120)
[OK] Key buffer size/total MyISAM indexes: 1.0G/2.9G
[OK] Key buffer hit rate: 97.7% (1M cached/25K reads)
[OK] Query cache efficiency: 72.7% (92K cached/127K selects)
[OK] Query cache prunes per day: 0
[OK] Sorts requiring temporary tables: 0% (0 temp sorts/6K sorts)
[!!] Joins performed without indexes: 492
[!!] Temporary tables created on disk: 44% (490 on disk/1K total)
[OK] Thread cache hit rate: 98% (17 created/982 connections)
[OK] Table cache hit rate: 97% (262 open/268 opened)
[OK] Open file limit used: 0% (463/65K)
[OK] Table locks acquired immediately: 99% (78K immediate/78K locks)
-------- Recommendations -----------------------------------------------------
General recommendations:
Run OPTIMIZE TABLE to defragment tables for better performance
MySQL started within last 24 hours - recommendations may be inaccurate
Reduce your overall MySQL memory footprint for system stability
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
Variables to adjust:
*** MySQL's maximum memory usage is dangerously high ***
*** Add RAM before increasing MySQL buffer variables ***
join_buffer_size (> 10.0M, or always use indexes with joins)
tmp_table_size (> 192M)
max_heap_table_size (> 192M)
本來我的鑰匙緩衝區的大小僅設置爲64MB。當我將密鑰緩衝區大小設置爲1GB時,我的最大連接用戶數僅在17時達到峯值,而運行該命令。當它只設置爲64MB時,它總是達到允許的最大連接用戶數。我無法將此設置爲更高,因爲我的服務器僅限於4GB RAM。
http://rackerhacker.com/2008/06/24/mysql-error-1040-too-many-connections/ - 這是一個配置問題來分析表沒有必然的關係。運行分析會鎖定一個連接,並且如果您的運行接近您配置的限制,則會看到此問題。 –
我已經添加MySQLTuner結果,我做了一些改變,我沒有得到這「太多的連接」的錯誤了,當我運行的命令,但我得到一個MySQL的最大內存使用量是高危險的消息。我認爲這與索引太大的表格有關。有任何解決這個問題的方法嗎? – officeboi101