{"id":188,"date":"2014-07-28T10:19:56","date_gmt":"2014-07-28T02:19:56","guid":{"rendered":"http:\/\/blog.cyszys.com\/?p=188"},"modified":"2014-07-28T15:17:21","modified_gmt":"2014-07-28T07:17:21","slug":"ora-01555-ora-22924-snapshot-too-old","status":"publish","type":"post","link":"http:\/\/blog.cyszys.com\/?p=188","title":{"rendered":"\u3010\u642c\u7816\u3011ORA-01555  ORA-22924: snapshot too old"},"content":{"rendered":"<p style=\"color: #000000;\">\u672c\u6587\u8f6c\u81eadbdream\u7684\u535a\u5ba2 \u6e90\u5730\u5740\uff1a<a href=\"http:\/\/www.dbdream.org\/?p=1520\">http:\/\/www.dbdream.org\/?p=1520<\/a><\/p>\n<p style=\"color: #000000;\">\u7531\u535a\u4e3bdbdream\u53d1\u5e03\u4e8e2014\u5e747\u6708<\/p>\n<p>\u6628\u665a\u63a5\u5230\u4e00\u4e2a\u7535\u8bdd\uff0c\u6253\u7535\u8bdd\u7684\u662f\u5f00\u53d1\u4eba\u5458\uff0c\u8bf4\u6570\u636e\u5e93\u9047\u5230ORA-01555\u9519\u8bef\uff0c\u5e94\u7528\u65e0\u6cd5\u6b63\u5e38\u4f7f\u7528\uff0c\u5f53\u65f6\u5f88\u7eb3\u95f7\uff0cORA-01555\u9519\u8bef\u901a\u5e38\u5f71\u54cd\u7684\u662f\u67e5\u8be2\u64cd\u4f5c\uff0c\u600e\u4e48\u4f1a\u5f71\u54cd\u4e1a\u52a1\u65e0\u6cd5\u4f7f\u7528\u5462\uff1f\n\u6309\u7167\u6b63\u5e38\u6d41\u7a0b\uff0c\u8ba9\u4ed6\u67e5\u4e86\u4e0bundo\u8868\u7a7a\u95f4\u548cundo\u4fdd\u7559\u65f6\u95f4\uff0c\u53d1\u73b0\u9664\u4e86undo\u4fdd\u7559\u65f6\u95f4\u8f83\u77ed\u5916\u5e76\u6ca1\u6709\u5f02\u5e38\u3002<\/p>\n<pre class=\"brush:other\">SQL> select a.NAME,b.FILE_NAME,b.BYTES\/1024\/1024\/1024 as BYTES,b.MAXBYTES\/1024\/1024\/1024 as MAXBYTES from v$tablespace a,dba_data_files b where a.NAME=b.TABLESPACE_NAME AND A.NAME='UNDOTBS';\nNAME       FILE_NAME                                            BYTES   MAXBYTES\n---------- ------------------------------------------------ ---------- ----------\nUNDOTBS    \/u01\/app\/oracle\/oradata\/PROD\/disk1\/undotbs01.dbf  .48828125 31.9999847<\/pre>\n<p>&nbsp;<\/p>\n<pre class=\"brush:other\">SQL> show parameter undo_r\nNAME                        TYPE        VALUE\n------------------------- ----------- ---------\nundo_retention             integer     900<\/pre>\n<p>\u867d\u7136undo\u7684\u4fdd\u7559\u65f6\u95f4\u53ea\u6709900\u79d2(15\u5206\u949f)\uff0c\u53ef\u662fundo\u8868\u7a7a\u95f4\u53ea\u4f7f\u7528\u4e86500M\uff0c\u800cundo\u8868\u7a7a\u95f4\u6700\u5927\u53ef\u4ee5\u6269\u5c55\u523032G\uff0c\u8bf4\u660eundo\u8868\u7a7a\u95f4\u8fd8\u662f\u8db3\u591f\u7684\uff0c\u5c06undo_retention\u4fee\u6539\u4e3a10800\u79d2(3\u5c0f\u65f6)\uff0c\u5f00\u53d1\u4eba\u5458\u8bf4\u95ee\u9898\u4f9d\u65e7\uff0c\u8fd8\u662f\u62a5\u5feb\u7167\u8fc7\u65e7\uff0c\u800c\u4e14SQL\u521a\u8fd0\u884c\u5c31\u62a5\u9519\uff0c\u6000\u7591\u662f\u4f7f\u7528\u4e86\u95ea\u56de\u67e5\u8be2\uff0c\u5f00\u53d1\u4eba\u5458\u4e0d\u61c2\uff0c\u53d1\u8fc7\u6765SQL\u8bed\u53e5\u770b\u4e86\u4e0b\uff0c\u53ea\u662f\u4e00\u6761\u975e\u5e38\u7b80\u5355\u7684SQL\uff0c\u5e76\u6ca1\u6709\u4f7f\u7528\u95ea\u56de\u67e5\u8be2\u3002<\/p>\n<pre class=\"brush:other\">select * from t_restree where c_pid = 'BPM_TREENODE';<\/pre>\n<p>\u96be\u9053\u662f\u9047\u5230\u4e8610.2.0.5\u7248\u672c\u4e4b\u524d\u7684ORA-01555\u7684BUG\u4e86\uff1f\u7533\u8bf7\u8fdc\u7a0b\u770b\u4e0b\uff0c\u8fdc\u7a0b\u540e\u53d1\u73b0\u7279\u522b\u5947\u602a\uff0c\u544a\u8b66\u65e5\u5fd7\u5e76\u6ca1\u6709\u8bb0\u5f55\u8fd9\u4e2aORA-01555\u7684\u4efb\u4f55\u4fe1\u606f\uff0c\u65e0\u8bba\u662fSYSTEM UNDO\u8fd8\u662fUNDO TABLESPACE\u5bfc\u81f4\u7684ORA-01555\u9519\u8bef\u8fd8\u662fBUG\u5bfc\u81f4\u7684ORA-01555\u9519\u8bef\uff0c\u544a\u8b66\u65e5\u5fd7\u901a\u5e38\u90fd\u4f1a\u8bb0\u5f55\uff0c\u800c\u8fd9\u4e2a\u5374\u6ca1\u6709\u8bb0\u5f55\u3002\u67e5\u770b\u6570\u636e\u5e93\u7248\u672c\uff0c\u53d1\u73b0\u662f11.2.0.3.0\u7248\u672c\u3002<\/p>\n<p>\u7531\u4e8e\u662f\u67e5\u8be2\u64cd\u4f5c\uff0c\u76f4\u63a5\u5728SQLPLUS\u91cc\u67e5\u8be2\uff0c\u53d1\u73b0\u7684\u786e\u4f1a\u9047\u5230ORA-01555\u9519\u8bef\u3002<\/p>\n<pre class=\"brush:other\">SQL> select * from jxpg_smartbi.t_restree where c_pid = 'BPM_TREENODE';\nERROR:\nORA-01555: snapshot too old: rollback segment number  with name \"\" too small\nORA-22924: snapshot too old<\/pre>\n<p>&nbsp;<\/p>\n<p>\u6b63\u5e38\u65e0\u8bba\u662fSYSTEM UNDO\u8fd8\u662fUNDO TABLESPACE\u5bfc\u81f4\u7684ORA-01555\u9519\u8bef\uff0c\u5728\u62a5\u9519\u63d0\u793a\u4e2d\u901a\u5e38\u90fd\u53ef\u4ee5\u770b\u5230\u56de\u6eda\u6bb5\u7684number\u53f7\u548c\u540d\u5b57\uff0c\u800c\u8fd9\u4e2a\u62a5\u9519number\u548cname\u90fd\u662f\u7a7a\u7684\uff0c\u5f88\u5947\u602a\uff0c\u800c\u4e14ORA-01555\u9519\u8bef\u4e0b\u9762\u8fd8\u5e26\u7740ORA-22924\u9519\u8bef\uff0c\u8fd9\u8ba9\u6211\u60f3\u5230\u4e86\u7b2c\u4e09\u79cdUNDO\uff0c\u5c31\u662fLOB\u7684\u56de\u6eda\u6bb5\u3002\u8fd9\u91cc\u5148\u8bf4\u4e00\u4e0bORACLE\u6570\u636e\u5e93\u7684\u56de\u6eda\u6bb5\uff0c\u6211\u77e5\u9053\u7684\u6709\u4e09\u79cd\uff1a\n1.system undo\uff1asystem\u56de\u6eda\u6bb5\uff0c\u4f7f\u7528system\u8868\u7a7a\u95f4\uff0csystem undo\u635f\u574f\u901a\u5e38\u9700\u8981\u501f\u52a9bbed\u5de5\u5177\u6062\u590d\uff0c\u76f8\u5bf9\u590d\u6742\u3002\n2.undo tablespace\uff1a\u8fd9\u4e2a\u5927\u5bb6\u90fd\u77e5\u9053\uff0c\u5b58\u4e00\u4e9b\u7528\u6237DML\u64cd\u4f5c\u7684\u6570\u636e\u5757\u7684\u524d\u955c\u50cf\uff0c\u4fdd\u8bc1\u4e00\u81f4\u6027\u8bfb\uff0c\u5927\u90e8\u5206\u7684ORA-01555\u9519\u8bef\u90fd\u4e0eundo tablespace\u6709\u5173\u3002\n3.LOB undo\uff1a\u8fd9\u4e2a\u53ef\u80fd\u5f88\u591a\u4eba\u5c31\u4e0d\u77e5\u9053\u4e86\uff0cLOB\u5927\u5bf9\u8c61\u6709\u81ea\u5df1\u7684undo\u7a7a\u95f4\uff0c\u5e76\u4e0d\u4f7f\u7528undo tablespace\uff0c\u800c\u662f\u4f7f\u7528\u5b58\u653eLOB\u672c\u8eab\u7684\u6570\u636e\u5757\uff0c\u4f7f\u7528\u7684\u662fLOB\u4f7f\u7528\u7684\u8868\u7a7a\u95f4\uff0c\u800c\u4e14\u5927\u5c0f\u53d7LOB\u5bf9\u8c61\u5360\u7528\u7684\u6570\u636e\u5757\u4e2a\u6570\u4e0epctversion\u7684\u5f71\u54cd\u3002<\/p>\n<p>\u901a\u5e38system undo\u51fa\u53d1ORA-01555\u9519\u8bef\u90fd\u662f\u5728\u6570\u636e\u5e93\u542f\u52a8\u7684\u65f6\u5019\uff0c\u800c\u4e14\u6570\u636e\u5e93\u8d77\u4e0d\u6765\uff0c\u800c\u4e14\u4e1a\u52a1\u7528\u6237\u57fa\u672c\u4e0d\u4f1a\u89e6\u53d1\uff0c\u7b2c\u4e00\u79cd\u60c5\u51b5\u57fa\u672c\u53ef\u4ee5\u6392\u9664\u4e86\u3002\u7b2c\u4e8c\u79cd\u60c5\u51b5\u4e5f\u4e0d\u7b26\u5408\uff0c\u9664\u4e86BUG\u548c\u95ea\u56de\u67e5\u8be2\uff0c\u5982\u679c\u662f\u7b2c\u4e8c\u79cd\u60c5\u51b5\u57fa\u672c\u4e0d\u4f1a\u5728SQL\u8fd0\u884c\u65f6\u7acb\u9a6c\u629b\u51faORA-01555\u9519\u8bef\u3002\u90a3\u4e48\uff0c\u6700\u5927\u7684\u5acc\u7591\u5c31\u662f\u7b2c\u4e09\u79cd\u60c5\u51b5\u4e86\u3002<\/p>\n<p>\u67e5\u770b\u8868\u7ed3\u6784\uff0c\u662f\u5426\u5b58\u5728LOB\u5b57\u6bb5(\u5e94\u8be5\u662fCLOB\uff0cBLOB\u901a\u5e38\u4e0d\u4f1a\u5728\u6570\u636e\u5e93\u4e2d\u505aDML\u64cd\u4f5c)\u3002<\/p>\n<pre class=\"brush:other\">SQL> desc jxpg_smartbi.t_restree\n Name                                 Null?     Type\n ----------------------------------------------------- -------- ------------------------------------\n C_RESID                              NOT NULL VARCHAR2(255)\n C_RESNAME                           VARCHAR2(255)\n C_RESTYPE                           VARCHAR2(255)\n C_PERM                              CLOB\n C_RESDESC                           VARCHAR2(255)\n C_STATUS                            VARCHAR2(255)\n C_LASTMODIFIED                         DATE\n C_RESALIAS                             VARCHAR2(255)\n C_CREATED                           DATE\n C_ORDER                             NUMBER(38)\n C_EXTENDED                             CLOB\n C_PID                               VARCHAR2(255)<\/pre>\n<p>\u53ef\u89c1\uff0c\u8868\u4e2d\u5305\u542b\u4e24\u4e2aCLOB\u5b57\u6bb5\uff0c\u548c\u731c\u6d4b\u7684\u57fa\u672c\u4e00\u81f4\uff0c\u5728\u770b\u770bORA-22924\u9519\u8bef\uff0c\u5feb\u7167\u8fc7\u65e7\u4e0d\u90fd\u662fORA-01555\u5417\uff0c\u600e\u4e48\u53c8\u51fa\u6765\u4e2a22924\uff0c\u67e5\u770b22924\u7684\u9519\u8bef\u63cf\u8ff0\u3002<\/p>\n<pre class=\"brush:other\">[oracle@ora99 ~]$ oerr ora 22924\n22924, 00000, \"snapshot too old\"\n\/\/  *Cause:  The version of the LOB value needed for the consistent read was\n\/\/           already overwritten by another writer.\n\/\/  *Action: Use a larger version pool.<\/pre>\n<p>\u539f\u6765ORA-22924\u662fLOB\u4e13\u6709\u7684\u5feb\u7167\u8fc7\u65e7\u7684\u9519\u8bef\u4ee3\u53f7\uff0c\u5230\u8fd9\u4e5f\u5c31\u8bc1\u660e\u6211\u7684\u731c\u6d4b\u662f\u5bf9\u7684\u3002\u67e5\u770b\u4e0b\u4ed6\u4eec\u7684\u8868\u662f\u5982\u4f55\u5efa\u7684\uff0c\u53d1\u73b0\u8fd8\u662f\u5b58\u5728\u5f88\u591a\u95ee\u9898\u3002<\/p>\n<pre class=\"brush:other\">SQL> SET LONG 10000\nSQL> select dbms_metadata.get_ddl('TABLE','T_RESTREE','JXPG_SMARTBI') FROM DUAL;\n\nDBMS_METADATA.GET_DDL('TABLE','T_RESTREE','JXPG_SMARTBI')\n--------------------------------------------------------------------------------\n\n  CREATE TABLE \"JXPG_SMARTBI\".\"T_RESTREE\"\n   (    \"C_RESID\" VARCHAR2(255) NOT NULL ENABLE,\n        \"C_RESNAME\" VARCHAR2(255),\n        \"C_RESTYPE\" VARCHAR2(255),\n        \"C_PERM\" CLOB,\n        \"C_RESDESC\" VARCHAR2(255),\n        \"C_STATUS\" VARCHAR2(255),\n        \"C_LASTMODIFIED\" DATE,\n        \"C_RESALIAS\" VARCHAR2(255),\n        \"C_CREATED\" DATE,\n\nDBMS_METADATA.GET_DDL('TABLE','T_RESTREE','JXPG_SMARTBI')\n--------------------------------------------------------------------------------\n        \"C_ORDER\" NUMBER(*,0),\n        \"C_EXTENDED\" CLOB,\n        \"C_PID\" VARCHAR2(255),\n         PRIMARY KEY (\"C_RESID\")\n  USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS\n  STORAGE(INITIAL 655360 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645\n  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1\n  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)\n  TABLESPACE \"JYJGODS\"  ENABLE\n   ) SEGMENT CREATION IMMEDIATE\n  PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255\n\nDBMS_METADATA.GET_DDL('TABLE','T_RESTREE','JXPG_SMARTBI')\n--------------------------------------------------------------------------------\n NOCOMPRESS LOGGING\n  STORAGE(INITIAL 3145728 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645\n  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1\n  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT)\n  TABLESPACE \"JYJGODS\"\n LOB (\"C_PERM\") STORE AS BASICFILE (\n  TABLESPACE \"JYJGODS\" ENABLE STORAGE IN ROW CHUNK 8192 PCTVERSION 10\n  NOCACHE LOGGING\n  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645\n  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1\n  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT))\n\nDBMS_METADATA.GET_DDL('TABLE','T_RESTREE','JXPG_SMARTBI')\n--------------------------------------------------------------------------------\n LOB (\"C_EXTENDED\") STORE AS BASICFILE (\n  TABLESPACE \"JYJGODS\" ENABLE STORAGE IN ROW CHUNK 8192 PCTVERSION 10\n  NOCACHE LOGGING\n  STORAGE(INITIAL 65536 NEXT 1048576 MINEXTENTS 1 MAXEXTENTS 2147483645\n  PCTINCREASE 0 FREELISTS 1 FREELIST GROUPS 1\n  BUFFER_POOL DEFAULT FLASH_CACHE DEFAULT CELL_FLASH_CACHE DEFAULT))<\/pre>\n<p>\u8fd9\u91cc\u53d1\u73b0\u4e86\u51e0\u5904\u95ee\u9898\uff1a\nENABLE STORAGE IN ROW\uff1a\u542b\u6709LOB\u5b57\u6bb5\u7684\u8868\uff0c\u5efa\u8bae\u4e0d\u8981\u8bb2LOB\u5b57\u6bb5\u653e\u5230\u884c\u5185\uff0c\u5e94\u8be5\u5c06LOB\u5b57\u6bb5\u653e\u5230\u884c\u5916\uff0c\u5e76\u4e14\u5b58\u50a8\u5728\u72ec\u7acb\u7684\u8868\u7a7a\u95f4\uff0c\u4e5f\u5c31\u662f\u6b64\u5904\u5e94\u8be5\u662fDISABLE STORAGE IN ROW\u3002\u539f\u56e0\u662fLOB\u5bf9\u8c61\u901a\u5e38\u90fd\u8f83\u5927\uff0c\u5b58\u5728\u884c\u5185\u53ef\u80fd\u4f1a\u5bfc\u81f4\u884c\u94fe\u63a5\uff0c\u5f71\u54cd\u6027\u80fd\uff0c\u5c06LOB\u5b58\u5728\u72ec\u7acb\u7684\u8868\u7a7a\u95f4\uff0cIO\u6027\u80fd\u4e5f\u4f1a\u6709\u6240\u63d0\u9ad8\u3002\nSTORE AS BASICFILE\uff1a\u6570\u636e\u5e93\u5f53\u524d\u7248\u672c11.2.0.3.0\uff0c11g\u63a8\u51fa\u4e86securefiles\u65b0\u7279\u6027\u6765\u5b58\u50a8LOB\u5b57\u6bb5\uff0c\u8bfb\u5199\u6027\u80fd\u90fd\u6bd4BASICFILE\u8981\u9ad8\u5f88\u591a\uff0c\u51fa\u4e8e\u5bf9\u6027\u80fd\u7684\u8003\u8651\uff0c\u5e94\u8be5\u4f7f\u7528SECUREFILES\u5b58\u50a8\u6a21\u5f0f\u6765\u5b58LOB\u5b57\u6bb5\u3002\nPCTVERSION 10\uff1a\u8fd9\u4e5f\u662f\u5bfc\u81f4\u8fd9\u4e2a\u95ee\u9898\u53d1\u751f\u7684\u6839\u672c\u539f\u56e0\uff0cPCTVERSION\u4e5f\u5c31\u662fversion pool\uff0c\u8fd9\u90e8\u5206\u7a7a\u95f4\u5c31\u662f\u9884\u7559\u7ed9LOB\u4f7f\u7528\u7684\u56de\u6eda\u6bb5\uff0c\u9ed8\u8ba4\u662f10%\uff0c\u5bf9\u4e8eBLOB\u6765\u8bb2(BLOB\u901a\u5e38\u53ea\u662f\u67e5\u770b\uff0c\u57fa\u672c\u6ca1\u6709\u5728\u6570\u636e\u5e93\u4e2d\u4fee\u6539\u7684\u64cd\u4f5c)\uff0c10%\u57fa\u672c\u8db3\u591f\u4e86\uff0c\u53ef\u662f\u5bf9CLOB\u6765\u8bb2\uff0c10%\u7684\u56de\u6eda\u6bb5\u5c31\u4e0d\u662f\u5f88\u5bcc\u88d5\u4e86\uff0c\u4e5f\u6b63\u662f\u8fd9\u6837\uff0c\u4ed6\u4eec\u624d\u9047\u5230\u8fd9\u4e2a\u95ee\u9898\u3002\n\u89e3\u51b3\u65b9\u6cd5\uff1a\n\u53ef\u4ee5\u589e\u5927PCTVERSION\uff0c\u4f7fLOB\u7684\u56de\u6eda\u6bb5\u589e\u5927\u3002\n\u6269\u5c55\u8868\u7684EXTENT\uff0c\u6269\u5c55\u8868\u7684EXTENT\u4e5f\u4f1a\u95f4\u63a5\u589e\u5927LOB\u7684\u56de\u6eda\u6bb5\u3002\n\u5efa\u7acbBLOCK SIZE\u4e3a16K\u7684\u8868\u7a7a\u95f4\uff0c\u5c06\u8868MOVE\u5230\u65b0\u8868\u7a7a\u95f4\u3002<\/p>","protected":false},"excerpt":{"rendered":"<p>\u672c\u6587\u8f6c\u81eadbdream\u7684\u535a\u5ba2 \u6e90\u5730\u5740\uff1a<a href=\"http:\/\/www.dbdream.org\/?p=1520\">http:\/\/www.dbdream.org\/?p=1520<\/a> \u7531\u535a\u4e3bdb [&hellip;]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"aioseo_notices":[],"_links":{"self":[{"href":"http:\/\/blog.cyszys.com\/index.php?rest_route=\/wp\/v2\/posts\/188"}],"collection":[{"href":"http:\/\/blog.cyszys.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.cyszys.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.cyszys.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.cyszys.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=188"}],"version-history":[{"count":4,"href":"http:\/\/blog.cyszys.com\/index.php?rest_route=\/wp\/v2\/posts\/188\/revisions"}],"predecessor-version":[{"id":192,"href":"http:\/\/blog.cyszys.com\/index.php?rest_route=\/wp\/v2\/posts\/188\/revisions\/192"}],"wp:attachment":[{"href":"http:\/\/blog.cyszys.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=188"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.cyszys.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=188"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.cyszys.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=188"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}