{"id":5313,"date":"2021-06-10T16:52:04","date_gmt":"2021-06-10T08:52:04","guid":{"rendered":"https:\/\/damogame.cn\/wordpress\/?p=5313"},"modified":"2021-06-11T11:24:43","modified_gmt":"2021-06-11T03:24:43","slug":"%e8%a7%a3%e5%86%b3lost-connection-to-mysql-server-during-query%e9%94%99%e8%af%af%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/i007.cc\/wordpress\/archives\/5313","title":{"rendered":"\u89e3\u51b3Lost connection to MySQL server during query\u9519\u8bef\u65b9\u6cd5"},"content":{"rendered":"
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\u539f\u6587\u5730\u5740<\/a><\/div>\n
<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\u6628\u5929\u4f7f\u7528Navicat for MySQL\u5bfc\u5165MySQL\u6570\u636e\u5e93\u7684\u65f6\u5019\uff0c\u51fa\u73b0\u4e86\u4e00\u4e2a\u4e25\u91cd\u7684\u9519\u8bef\uff0cLost connection to MySQL server during query\uff0c\u5b57\u9762\u610f\u601d\u5c31\u662f\u5728\u67e5\u8be2\u8fc7\u7a0b\u4e2d\u4e22\u5931\u8fde\u63a5\u5230MySQL\u670d\u52a1\u5668\u3002<\/b>[Msg] Decompressing…<\/b><\/p>\n

[Msg] Table Created: wp_wiki_copy<\/b><\/p>\n

[Msg] Importing Data…<\/b><\/p>\n

[Msg] 2013 – Lost connection to MySQL server during query<\/b><\/p>\n

[Msg] Table Restored: wp_wiki_copy<\/b><\/p>\n

[Msg] Finished – Stopped before completion<\/b><\/p>\n

\u6211\u7684\u6570\u636e\u91cf\u5927\u6982\u4e865\u4e07\u6761\uff0c\u5907\u4efd\u7684\u6570\u636e\u5e93\u6587\u4ef6\u5927\u5c0f\u6709240M\uff0c\u8fd9\u8fd8\u662f\u538b\u7f29\u4e86\u7684\uff0c\u786e\u5b9e\u6709\u70b9\u5927\u3002\u521d\u6b65\u5224\u65ad\u662fMySQL\u53ef\u80fd\u6302\u6389\u4e86\uff0c\u5728\u7cfb\u7edf\u670d\u52a1\u91cc\u9762\u67e5\u770bMySQL\u7684\u8fdb\u7a0b\u5e76\u6ca1\u6709\u505c\u6b62\u3002\u6700\u5f00\u59cb\u8003\u8651\u662f\u6570\u636e\u5e93\u7ed3\u6784\u4e0d\u5bf9\uff0c\u4f46\u662f\u6211\u662f\u901a\u8fc7Navicat for MySQL\u7684\u5907\u4efd\u548c\u6062\u590d\u5907\u4efd\u5bfc\u5165\u6570\u636e\uff0c\u5e94\u8be5\u8868\u7ed3\u6784\u90fd\u5728\u5907\u4efd\u6587\u4ef6\u91cc\u9762\uff0c\u5e94\u8be5\u4e0d\u662f\u6570\u636e\u5e93\u7ed3\u6784\u7684\u95ee\u9898\u3002\u7f51\u7edc\u73af\u5883\u90fd\u662f\u672c\u5730\u3002\u4e5f\u4e0d\u53ef\u80fd\u662f\u7f51\u7edc\u94fe\u63a5\u548c\u6570\u636e\u5e93\u670d\u52a1\u5668\u7684\u95ee\u9898\u3002\u6700\u540e\u5728\u65e9\u4e0a\u627e\u5230\u4e86\u89e3\u51b3\u65b9\u6cd5\uff0c\u5728my.ini\u914d\u7f6e\u6587\u4ef6 mysqld \u8282\u70b9\u4e0b\u6dfb\u52a0<\/b><\/p>\n

max_allowed_packet = 500M<\/b><\/p>\n

\u914d\u7f6eMySQL\u5141\u8bb8\u7684\u6700\u5927\u6570\u636e\u5305\u5927\u5c0f\uff0c\u4e0a\u9762\u7684500000M\u4f60\u53ef\u4ee5\u6839\u636e\u4f60\u7684\u9879\u76ee\u4fee\u6539\u4e3a\u4f60\u81ea\u5df1\u7684\u503c\uff0c\u53ea\u8981\u6bd4\u8981\u5bfc\u5165\u7684\u5907\u4efd\u6587\u4ef6\u5927\u5c31\u53ef\u4ee5\u4e86\u3002<\/b><\/p>\n

\n

mysql\u51fa\u73b0ERROR : (2006, ‘MySQL server has gone away’) \u95ee\u9898\u610f\u601d\u662f\u6307client\u548cMySQL server\u4e4b\u95f4\u7684\u94fe\u63a5\u65ad\u4e86<\/b><\/p>\n

\u9020\u6210\u8fd9\u6837\u7684\u539f\u56e0\u4e00\u822c\u662fsql\u64cd\u4f5c\u7684\u65f6\u95f4\u8fc7\u957f\uff0c\u6216\u8005\u662f\u4f20\u9001\u7684\u6570\u636e\u592a\u5927(\u4f8b\u5982\u4f7f\u7528insert … values\u7684\u8bed\u53e5\u8fc7\u957f\uff0c \u8fd9\u79cd\u60c5\u51b5\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539max_allowed_packed\u7684\u914d\u7f6e\u53c2\u6570\u6765\u907f\u514d\uff0c\u4e5f\u53ef\u4ee5\u5728\u7a0b\u5e8f\u4e2d\u5c06\u6570\u636e\u5206\u6279\u63d2\u5165)\u3002<\/b><\/p>\n

\u4ea7\u751f\u8fd9\u4e2a\u95ee\u9898\u7684\u539f\u56e0\u6709\u5f88\u591a\uff0c\u603b\u7ed3\u4e0b\u7f51\u4e0a\u7684\u5206\u6790\uff1a<\/b><\/p>\n

\u539f\u56e0\u4e00. MySQL \u670d\u52a1\u5b95\u4e86 <\/b><\/p>\n

\u5224\u65ad\u662f\u5426\u5c5e\u4e8e\u8fd9\u4e2a\u539f\u56e0\u7684\u65b9\u6cd5\u5f88\u7b80\u5355\uff0c\u8fdb\u5165mysql\u63a7\u5236\u53f0\uff0c\u67e5\u770bmysql\u7684\u8fd0\u884c\u65f6\u957f<\/b><\/p>\n

mysql> show global status like ‘uptime’;<\/b><\/p>\n

+—————+———+<\/p>\n

| Variable_name | Value\u00a0\u00a0 |<\/p>\n

+—————+———+<\/p>\n

| Uptime\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | 3414707 |<\/p>\n

+—————+———+<\/p>\n

1 row in set\u6216\u8005\u67e5\u770bMySQL\u7684\u62a5\u9519\u65e5\u5fd7\uff0c\u770b\u770b\u6709\u6ca1\u6709\u91cd\u542f\u7684\u4fe1\u606f
\n<\/b><\/p>\n

\u5982\u679cuptime\u6570\u503c\u5f88\u5927\uff0c\u8868\u660emysql\u670d\u52a1\u8fd0\u884c\u4e86\u5f88\u4e45\u4e86\u3002\u8bf4\u660e\u6700\u8fd1\u670d\u52a1\u6ca1\u6709\u91cd\u542f\u8fc7\u3002<\/b><\/p>\n

\u5982\u679c\u65e5\u5fd7\u6ca1\u6709\u76f8\u5173\u4fe1\u606f\uff0c\u4e5f\u8868\u540dmysql\u670d\u52a1\u6700\u8fd1\u6ca1\u6709\u91cd\u542f\u8fc7\uff0c\u53ef\u4ee5\u7ee7\u7eed\u68c0\u67e5\u4e0b\u9762\u51e0\u9879\u5185\u5bb9\u3002<\/b><\/p>\n

\u539f\u56e0\u4e8c. mysql\u8fde\u63a5\u8d85\u65f6 <\/b><\/p>\n

\u5373\u67d0\u4e2amysql\u957f\u8fde\u63a5\u5f88\u4e45\u6ca1\u6709\u65b0\u7684\u8bf7\u6c42\u53d1\u8d77\uff0c\u8fbe\u5230\u4e86server\u7aef\u7684timeout\uff0c\u88abserver\u5f3a\u884c\u5173\u95ed\u3002<\/p>\n

\u6b64\u540e\u518d\u901a\u8fc7\u8fd9\u4e2aconnection\u53d1\u8d77\u67e5\u8be2\u7684\u65f6\u5019\uff0c\u5c31\u4f1a\u62a5\u9519server has gone away<\/p>\n

\uff08\u5927\u90e8\u5206PHP\u811a\u672c\u5c31\u662f\u5c5e\u4e8e\u6b64\u7c7b\uff09<\/p>\n

mysql> show global variables like ‘%timeout’;<\/b><\/p>\n

+—————————-+———-+<\/p>\n

| Variable_name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | Value\u00a0\u00a0\u00a0 |<\/p>\n

+—————————-+———-+<\/p>\n

| connect_timeout\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | 10\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |<\/p>\n

| delayed_insert_timeout\u00a0\u00a0\u00a0\u00a0 | 300\u00a0\u00a0\u00a0\u00a0\u00a0 |<\/p>\n

| innodb_lock_wait_timeout\u00a0\u00a0 | 50\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |<\/p>\n

| innodb_rollback_on_timeout | OFF\u00a0\u00a0\u00a0\u00a0\u00a0 |<\/p>\n

| interactive_timeout\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | 28800\u00a0\u00a0\u00a0 |<\/p>\n

| lock_wait_timeout\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | 31536000 |<\/p>\n

| net_read_timeout\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | 30\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |<\/p>\n

| net_write_timeout\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | 60\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 |<\/p>\n

| slave_net_timeout\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | 3600\u00a0\u00a0\u00a0\u00a0 |<\/p>\n

| wait_timeout\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | 28800\u00a0\u00a0\u00a0 |<\/p>\n

+—————————-+———-+<\/p>\n

10 rows in set<\/p>\n

wait_timeout \u662f28800\u79d2\uff0c\u5373mysql\u94fe\u63a5\u5728\u65e0\u64cd\u4f5c28800\u79d2\u540e\u88ab\u81ea\u52a8\u5173\u95ed<\/b><\/p>\n

\u539f\u56e0\u4e09. mysql\u8bf7\u6c42\u94fe\u63a5\u8fdb\u7a0b\u88ab\u4e3b\u52a8kill
\n<\/b><\/p>\n

\u8fd9\u79cd\u60c5\u51b5\u548c\u539f\u56e0\u4e8c\u76f8\u4f3c\uff0c\u53ea\u662f\u4e00\u4e2a\u662f\u4eba\u4e3a\u4e00\u4e2a\u662fMYSQL\u81ea\u5df1\u7684\u52a8\u4f5c<\/p>\n

mysql> show global status like ‘com_kill’;<\/b><\/p>\n

+—————+——-+<\/p>\n

| Variable_name | Value |<\/p>\n

+—————+——-+<\/p>\n

| Com_kill\u00a0\u00a0\u00a0\u00a0\u00a0 | 21\u00a0\u00a0\u00a0 |<\/p>\n

+—————+——-+<\/p>\n

1 row in set\u539f\u56e0\u56db. Your SQL statement was too large.<\/p>\n

\u5f53\u67e5\u8be2\u7684\u7ed3\u679c\u96c6\u8d85\u8fc7 max_allowed_packet \u4e5f\u4f1a\u51fa\u73b0\u8fd9\u6837\u7684\u62a5\u9519\u3002\u5b9a\u4f4d\u65b9\u6cd5\u662f\u6253\u51fa\u76f8\u5173\u62a5\u9519\u7684\u8bed\u53e5\u3002<\/p>\n

\u7528select * into outfile \u7684\u65b9\u5f0f\u5bfc\u51fa\u5230\u6587\u4ef6\uff0c\u67e5\u770b\u6587\u4ef6\u5927\u5c0f\u662f\u5426\u8d85\u8fc7 max_allowed_packet \uff0c\u5982\u679c\u8d85\u8fc7\u5219\u9700\u8981\u8c03\u6574\u53c2\u6570\uff0c\u6216\u8005\u4f18\u5316\u8bed\u53e5\u3002<\/p>\n

mysql> show global variables like ‘max_allowed_packet’;<\/b><\/p>\n

+——————–+———+<\/p>\n

| Variable_name\u00a0\u00a0\u00a0\u00a0\u00a0 | Value\u00a0\u00a0 |<\/p>\n

+——————–+———+<\/p>\n

| max_allowed_packet | 1048576 |<\/p>\n

+——————–+———+<\/p>\n

1 row in set (0.00 sec)<\/p>\n

\u4fee\u6539\u53c2\u6570\uff1a<\/p>\n

mysql> set global max_allowed_packet=1024*1024*16;<\/b><\/p>\n

mysql> show global variables like ‘max_allowed_packet’;<\/b><\/p>\n

+——————–+———-+<\/p>\n

| Variable_name\u00a0\u00a0\u00a0\u00a0\u00a0 | Value\u00a0\u00a0\u00a0 |<\/p>\n

+——————–+———-+<\/p>\n

| max_allowed_packet | 16777216 |<\/p>\n

+——————–+———-+<\/p>\n

1 row in set (0.00 sec)<\/p>\n

\u4ee5\u4e0b\u662f\u8865\u5145\uff1a<\/b><\/p>\n

\u5e94\u7528\u7a0b\u5e8f\uff08\u6bd4\u5982PHP\uff09\u957f\u65f6\u95f4\u7684\u6267\u884c\u6279\u91cf\u7684MYSQL\u8bed\u53e5\u3002\u6267\u884c\u4e00\u4e2aSQL\uff0c\u4f46SQL\u8bed\u53e5\u8fc7\u5927\u6216\u8005\u8bed\u53e5\u4e2d\u542b\u6709BLOB\u6216\u8005longblob\u5b57\u6bb5\u3002\u6bd4\u5982\uff0c\u56fe\u7247\u6570\u636e\u7684\u5904\u7406\u3002\u90fd\u5bb9\u6613\u5f15\u8d77MySQL server has gone away\u3002\u5927\u6982\u6d4f\u89c8\u4e86\u4e00\u4e0b\uff0c\u4e3b\u8981\u53ef\u80fd\u662f\u56e0\u4e3a\u4ee5\u4e0b\u51e0\u79cd\u539f\u56e0\uff1a<\/p>\n

\u4e00\u79cd\u53ef\u80fd\u662f\u53d1\u9001\u7684SQL\u8bed\u53e5\u592a\u957f\uff0c\u4ee5\u81f4\u8d85\u8fc7\u4e86max_allowed_packet<\/b>\u7684\u5927\u5c0f\uff0c\u5982\u679c\u662f\u8fd9\u79cd\u539f\u56e0\uff0c\u4f60\u53ea\u8981\u4fee\u6539my.cnf\uff0c\u52a0\u5927max_allowed_packe<\/b>t\u7684\u503c\u5373\u53ef\u3002<\/p>\n

\u53ef\u80fd\u662f\u67d0\u4e9b\u539f\u56e0\u5bfc\u81f4\u8d85\u65f6\uff0c\u6bd4\u5982\u7a0b\u5e8f\u4e2d\u83b7\u53d6\u6570\u636e\u5e93\u8fde\u63a5\u65f6\u91c7\u7528Singleton\u505a\u6cd5\uff0c\u867d\u7136\u591a\u6b21\u8fde\u63a5\u6570\u636e\u5e93\uff0c\u4f46\u5176\u5b9e\u4f7f\u7528\u7684\u90fd\u662f\u540c\u4e00\u4e2a\u8fde\u63a5\uff0c\u800c\u4e14\u7a0b\u5e8f\u4e2d\u67d0\u4e24\u6b21\u64cd\u4f5c\u6570\u636e\u5e93\u7684\u95f4\u9694\u65f6\u95f4\u8d85\u8fc7\u4e86wait_timeout<\/b>\uff08SHOW STATUS\u80fd\u770b\u5230\u6b64\u8bbe\u7f6e\uff09\uff0c\u90a3\u4e48\u5c31\u53ef\u80fd\u51fa\u73b0\u95ee\u9898\u3002\u6700\u7b80\u5355\u7684\u5904\u7406\u65b9\u5f0f\u5c31\u662f\u628await_timeout\u6539\u5927\uff0c\u5f53\u7136\u4e5f\u53ef\u4ee5\u5728\u7a0b\u5e8f\u91cc\u65f6\u4e0d\u65f6\u987a\u624bmysql_ping()\u4e00\u4e0b\uff0c\u8fd9\u6837MySQL\u5c31\u77e5\u9053\u5b83\u4e0d\u662f\u4e00\u4e2a\u4eba\u5728\u6218\u6597\u3002<\/p>\n

\u89e3\u51b3MySQL server has gone away<\/b><\/p>\n

1\u3001\u5e94\u7528\u7a0b\u5e8f\uff08\u6bd4\u5982PHP\uff09\u957f\u65f6\u95f4\u7684\u6267\u884c\u6279\u91cf\u7684MYSQL\u8bed\u53e5\u3002\u6700\u5e38\u89c1\u7684\u5c31\u662f\u91c7\u96c6\u6216\u8005\u65b0\u65e7\u6570\u636e\u8f6c\u5316\u3002<\/b><\/p>\n

\u89e3\u51b3\u65b9\u6848\uff1a \u5728my.cnf\u6587\u4ef6\u4e2d\u6dfb\u52a0\u6216\u8005\u4fee\u6539\u4ee5\u4e0b\u4e24\u4e2a\u53d8\u91cf\uff1a<\/b><\/p>\n

wait_timeout=2880000<\/p>\n

interactive_timeout = 2880000<\/p>\n

\u5173\u4e8e\u4e24\u4e2a\u53d8\u91cf\u7684\u5177\u4f53\u8bf4\u660e\u53ef\u4ee5google\u6216\u8005\u770b\u5b98\u65b9\u624b\u518c\u3002\u5982\u679c\u4e0d\u80fd\u4fee\u6539my.cnf\uff0c\u5219\u53ef\u4ee5\u5728\u8fde\u63a5\u6570\u636e\u5e93\u7684\u65f6\u5019\u8bbe\u7f6eCLIENT_INTERACTIVE\uff0c\u6bd4\u5982\uff1a<\/b><\/p>\n

sql = “set interactive_timeout=24*3600”;<\/b><\/p>\n

mysql_real_query(…)<\/b><\/p>\n

2\u3001\u6267\u884c\u4e00\u4e2aSQL\uff0c\u4f46SQL\u8bed\u53e5\u8fc7\u5927\u6216\u8005\u8bed\u53e5\u4e2d\u542b\u6709BLOB\u6216\u8005longblob\u5b57\u6bb5\u3002\u6bd4\u5982\uff0c\u56fe\u7247\u6570\u636e\u7684\u5904\u7406<\/b><\/p>\n

\u89e3\u51b3\u65b9\u6848\uff1a\u5728my.cnf\u6587\u4ef6\u4e2d\u6dfb\u52a0\u6216\u8005\u4fee\u6539\u4ee5\u4e0b\u53d8\u91cf\uff1a<\/b><\/p>\n

max_allowed_packet = 10M(\u4e5f\u53ef\u4ee5\u8bbe\u7f6e\u81ea\u5df1\u9700\u8981\u7684\u5927\u5c0f)<\/b><\/p>\n

max_allowed_packet \u53c2\u6570\u7684\u4f5c\u7528\u662f\uff0c\u7528\u6765\u63a7\u5236\u5176\u901a\u4fe1\u7f13\u51b2\u533a\u7684\u6700\u5927\u957f\u5ea6\u3002<\/b><\/p>\n

\u6700\u8fd1\u505a\u7f51\u7ad9\u6709\u4e00\u4e2a\u7ad9\u8981\u7528\u5230WEB\u7f51\u9875\u91c7\u96c6\u5668\u529f\u80fd\uff0c\u5f53\u4e00\u4e2aPHP\u811a\u672c\u5728\u8bf7\u6c42URL\u7684\u65f6\u5019\uff0c\u53ef\u80fd\u8fd9\u4e2a\u88ab\u8bf7\u6c42\u7684\u7f51\u9875\u975e\u5e38\u6162\u6162\uff0c\u8d85\u8fc7\u4e86mysql\u7684 wait-timeout\u65f6\u95f4\uff0c\u7136\u540e\u5f53\u7f51\u9875\u5185\u5bb9\u88ab\u6293\u56de\u6765\u540e\uff0c\u51c6\u5907\u63d2\u5165\u5230MySQL\u7684\u65f6\u5019\uff0c\u53d1\u73b0MySQL\u7684\u8fde\u63a5\u8d85\u65f6\u5173\u95ed\u4e86\uff0c\u4e8e\u662f\u5c31\u51fa\u73b0\u4e86\u201cMySQL server has gone away\u201d\u8fd9\u6837\u7684\u9519\u8bef\u63d0\u793a\uff0c\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u7684\u7ecf\u9a8c\u6709\u4ee5\u4e0b\u4e24\u70b9\uff0c\u6216\u8bb8\u5bf9\u5927\u5bb6\u6709\u7528\u5904\uff1a<\/p>\n

\u7b2c \u4e00\u79cd\u65b9\u6cd5\uff1a<\/b><\/p>\n

\u5f53\u7136\u662f\u589e\u52a0\u4f60\u7684 wait-timeout\u503c<\/b>\uff0c\u8fd9\u4e2a\u53c2\u6570\u662f\u5728my.cnf(\u5728Windows\u4e0b\u53f0\u4e0b\u9762\u662fmy.ini\uff09<\/b>\u4e2d\u8bbe\u7f6e\uff0c\u6211\u7684\u6570\u636e\u5e93\u8d1f\u8377\u7a0d\u5fae\u5927\u4e00\u70b9\uff0c\u6240\u4ee5\uff0c\u6211\u8bbe\u7f6e\u7684\u503c \u4e3a10\uff0c\uff08\u8fd9\u4e2a\u503c\u7684\u5355\u4f4d\u662f\u79d2\uff0c\u610f\u601d\u662f\u5f53\u4e00\u4e2a\u6570\u636e\u5e93\u8fde\u63a5\u572810\u79d2\u949f\u5185\u6ca1\u6709\u4efb\u4f55\u64cd\u4f5c\u7684\u8bdd\uff0c\u5c31\u4f1a\u5f3a\u884c\u5173\u95ed\uff0c\u6211\u4f7f\u7528\u7684\u4e0d\u662f\u6c38\u4e45\u94fe\u63a5 \uff08mysql_pconnect<\/b>),\u7528\u7684\u662fmysql_connect<\/b>,\u5173\u4e8e\u8fd9\u4e2await-timeout\u7684\u6548\u679c\u4f60\u53ef\u4ee5\u5728MySQL\u7684\u8fdb\u7a0b\u5217\u8868\u4e2d\u770b\u5230 \uff08show processlist) \uff09\uff0c\u4f60\u53ef\u4ee5\u628a\u8fd9\u4e2await-timeout\u8bbe\u7f6e\u6210\u66f4\u5927\uff0c\u6bd4\u5982300\u79d2\uff0c\u5475\u5475\uff0c\u4e00\u822c\u6765\u8bb2300\u79d2\u8db3\u591f\u7528\u4e86\uff0c\u5176\u5b9e\u4f60\u4e5f\u53ef\u4ee5\u4e0d\u7528\u8bbe\u7f6e\uff0cMySQL\u9ed8\u8ba4\u662f8\u4e2a\u5c0f \u65f6\u3002\u60c5\u51b5\u7531\u4f60\u7684\u670d\u52a1\u5668\u548c\u7ad9\u70b9\u6765\u5b9a\u3002<\/b><\/p>\n

\u7b2c\u4e8c\u79cd\u65b9\u6cd5\uff1a<\/b><\/p>\n

\u8fd9\u4e5f\u662f\u6211\u4e2a\u4eba\u8ba4\u4e3a\u6700\u597d\u7684\u65b9\u6cd5\uff0c\u5373\u68c0\u67e5 MySQL\u7684\u94fe\u63a5\u72b6\u6001\uff0c\u4f7f\u5176\u91cd\u65b0\u94fe\u63a5\u3002<\/p>\n

\u53ef\u80fd\u5927\u5bb6\u90fd\u77e5\u9053\u6709mysql_ping<\/b>\u8fd9\u4e48\u4e00\u4e2a\u51fd\u6570\uff0c\u5728\u5f88\u591a\u8d44\u6599\u4e2d\u90fd\u8bf4\u8fd9\u4e2amysql_ping<\/b>\u7684 API\u4f1a\u68c0\u67e5\u6570\u636e\u5e93\u662f\u5426\u94fe\u63a5\uff0c\u5982\u679c\u662f\u65ad\u5f00\u7684\u8bdd\u4f1a\u5c1d\u8bd5\u91cd\u65b0\u8fde\u63a5\uff0c\u4f46\u5728\u6211\u7684\u6d4b\u8bd5\u8fc7\u7a0b\u4e2d\u53d1\u73b0\u4e8b\u5b9e\u5e76\u4e0d\u662f\u8fd9\u6837\u5b50\u7684\uff0c\u662f\u6709\u6761\u4ef6\u7684\uff0c\u5fc5\u987b\u8981\u901a\u8fc7 mysql_options\u8fd9\u4e2aC API\u4f20\u9012\u76f8\u5173\u53c2\u6570\uff0c\u8ba9MYSQL\u6709\u65ad\u5f00\u81ea\u52a8\u94fe\u63a5\u7684\u9009\u9879\uff08MySQL\u9ed8\u8ba4\u4e3a\u4e0d\u81ea\u52a8\u8fde\u63a5\uff09\uff0c\u4f46\u6211\u6d4b\u8bd5\u4e2d\u53d1\u73b0PHP\u7684MySQL\u7684API\u4e2d\u5e76\u4e0d\u5e26\u8fd9\u4e2a\u51fd\u6570\uff0c\u4f60\u91cd\u65b0\u7f16\u8f91MySQL\u5427\uff0c\u4f46mysql_ping\u8fd9\u4e2a\u51fd\u6570\u8fd8\u662f\u7ec8\u4e8e\u80fd\u7528\u5f97\u4e0a\u7684\uff0c\u53ea\u662f\u8981\u5728\u5176\u4e2d\u6709\u4e00\u4e2a\u5c0f\u5c0f\u7684\u64cd\u4f5c\u6280\u5de7\uff1a<\/p>\n

\u6211\u9700\u8981\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570\u7684\u4ee3\u7801\u53ef\u80fd\u662f\u8fd9\u6837\u5b50\u7684<\/p>\n

$str = file_get_contents(‘http:\/\/www.jb51.net’);<\/p>\n

$db->ping();\/\/\u7ecf\u8fc7\u524d\u9762\u7684\u7f51\u9875\u6293\u53d6\u540e\uff0c\u6216\u8005\u4f1a\u5bfc\u81f4\u6570\u636e\u5e93\u8fde\u63a5\u5173\u95ed,\u68c0\u67e5\u5e76\u91cd\u65b0\u8fde\u63a5<\/p>\n

$db->query(‘select * from table’);<\/p>\n

ping()\u8fd9\u4e2a\u51fd\u6570\u5148\u68c0\u6d4b\u6570\u636e\u8fde\u63a5\u662f\u5426\u6b63\u5e38\uff0c\u5982\u679c\u88ab\u5173\u95ed\uff0c\u6574\u4e2a\u628a\u5f53\u524d\u811a\u672c\u7684MYSQL\u5b9e\u4f8b\u5173\u95ed\uff0c\u518d\u91cd\u65b0\u8fde\u63a5\u3002<\/p>\n

\u7ecf \u8fc7\u8fd9\u6837\u5904\u7406\u540e\uff0c\u53ef\u4ee5\u975e\u5e38\u6709\u6548\u7684\u89e3\u51b3MySQL server has gone away\u8fd9\u6837\u7684\u95ee\u9898\uff0c\u800c\u4e14\u4e0d\u4f1a\u5bf9\u7cfb\u7edf\u9020\u6210\u989d\u5916\u7684\u5f00\u9500\u3002<\/p>\n

1\uff09 \u65b9\u6cd51<\/b><\/p>\n

\u53ef\u4ee5\u7f16\u8f91my.cnf\u6765\u4fee\u6539\uff08windows\u4e0bmy.ini\uff09,\u5728[mysqld]\u6bb5\u6216\u8005mysql\u7684server\u914d\u7f6e\u6bb5\u8fdb\u884c\u4fee\u6539\u3002<\/p>\n

max_allowed_packet = 20M<\/p>\n

\u5982\u679c\u627e\u4e0d\u5230my.cnf\u53ef\u4ee5\u901a\u8fc7<\/p>\n

mysql –help | grep my.cnf<\/p>\n

\u53bb\u5bfb\u627emy.cnf\u6587\u4ef6\u3002<\/p>\n

2\uff09 \u65b9\u6cd52<\/b><\/p>\n

\uff08\u5f88\u59a5\u534f\uff0c\u5f88\u7ea0\u7ed3\u7684\u529e\u6cd5\uff09<\/p>\n

\u8fdb\u5165mysql server<\/p>\n

\u5728mysql \u547d\u4ee4\u884c\u4e2d\u8fd0\u884c<\/p>\n

set global max_allowed_packet = 2*1024*1024*10<\/p>\n

\u7136\u540e\u5173\u95ed\u6389\u8fd9\u6b64mysql server\u94fe\u63a5\uff0c\u518d\u8fdb\u5165\u3002<\/p>\n

show VARIABLES like ‘%max_allowed_packet%’;<\/p>\n

\u67e5\u770b\u4e0bmax_allowed_packet\u662f\u5426\u7f16\u8f91\u6210\u529f<\/p>\n

mysql \u9ed8\u8ba4\u6700\u5927\u80fd\u591f\u5904\u7406\u7684\u662f1MB<\/b><\/p>\n

\u5982\u679c\u4f60\u5728sql\u4f7f\u7528\u4e86\u5927\u7684text\u6216\u8005BLOB\u6570\u636e\uff0c\u5c31\u4f1a\u51fa\u73b0\u8fd9\u4e2a\u95ee\u9898\u3002 php\u624b\u518c\u4e0a\u7684\u6ce8\u91ca<\/p>\n

[mysqld]max_allowed_packet=16M<\/b><\/p>\n

\u4f7f\u7528mysql\u505a\u6570\u636e\u5e93\u8fd8\u539f\u7684\u65f6\u5019\uff0c\u7531\u4e8e\u6709\u4e9b\u6570\u636e\u5f88\u5927\uff0c\u4f1a\u51fa\u73b0\u8fd9\u6837\u7684\u9519\u8bef\uff1aThe MySQL Server returned this Error:MySQL Error Nr.2006-MySQL server has gone away\u3002\u6211\u7684\u4e00\u4e2a150mb\u7684\u5907\u4efd\u8fd8\u539f\u7684\u65f6\u5019\u5c31\u51fa\u73b0\u4e86\u8fd9\u9519\u8bef\u3002\u89e3\u51b3\u7684\u65b9\u6cd5\u5c31\u662f\u627e\u5230mysql\u5b89\u88c5\u76ee\u5f55\uff0c\u627e\u5230my.ini\u6587\u4ef6\uff0c\u5728\u6587\u4ef6\u7684\u6700\u540e\u6dfb\u52a0\uff1amax_allowed_packet = 10M(\u4e5f\u53ef\u4ee5\u8bbe\u7f6e\u81ea\u5df1\u9700\u8981\u7684\u5927\u5c0f)\u3002 max_allowed_packet \u53c2\u6570\u7684\u4f5c\u7528\u662f\uff0c\u7528\u6765\u63a7\u5236\u5176\u901a\u4fe1\u7f13\u51b2\u533a\u7684\u6700\u5927\u957f\u5ea6\u3002<\/b><\/p>\n<\/article>\n","protected":false},"excerpt":{"rendered":"

\u539f\u6587\u5730\u5740 \u6628\u5929\u4f7f\u7528Navicat for<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","footnotes":""},"categories":[],"tags":[118],"class_list":["post-5313","post","type-post","status-publish","format-standard","hentry","tag-02-"],"_links":{"self":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/5313","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/comments?post=5313"}],"version-history":[{"count":0,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/posts\/5313\/revisions"}],"wp:attachment":[{"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/media?parent=5313"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/categories?post=5313"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/i007.cc\/wordpress\/wp-json\/wp\/v2\/tags?post=5313"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}