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    OERR: ORA-12519 TNS:no appropriate service handler found
    ¿Í»§¶ËÁ¬½Ó¼äЪÐÔʧ°Ü£¬±¨´íORA-12519
    Cause: the listener could not find any available service handlers that are
    appropriate for the client connection.
    Action: run "lsnrctl services" to ensure that the instance(s) have registered
    with the listener, and are accepting connections. ¼ì²élsnrctl service £¬instanceÒѾ­×¢²á£¬
    ״̬ÏÔʾreadyʱ£¬¿ÉÒÔÁ¬½Ó¡£
    When the listener believes the current number of connections has reached maximum load,
    it may set the state of the service handler for an instance to "blocked" and begin refusing
    incoming client connections with either of the following errors: ora-12519 or ora-12516
    ²ÉÓ÷þÎñ¶¯Ì¬×¢²áµÄ·½Ê½£¬ÓÉPMON ͨ¹ýSERVICE_UPDATE À´µÃµ½Ä¿Ç°Á¬½ÓÇé¿ö£¬µ«SERVICE_UPDATE ÓÐʱ¼ä¼ä¸ô£¬
    ËùÒÔ£¬listenerÏÔʾµÄÁ¬½ÓÊýºÍµ±Ç°Êµ¼ÊµÄÁ¬½ÓÊý¿ÉÄܲ»Í¬¡£
    ²éѯ½â¾ö·½·¨:
    ²é¿´Ò»ÏÂÊý¾Ý¿âÏÖÓеĽø³ÌÊý£¬ÊÇ·ñÒѾ­´ïµ½²ÎÊýprocessesµÄ´óС¡£
    1.select count(*) from v$process;                         È¡µÃÊý¾Ý¿âĿǰµÄ½ø³ÌÊý¡£
    2.select value from v$parameter where name = 'processes'; È¡µÃ½ø³ÌÊýµÄÉÏÏÞ¡£
    3.ÈçÒÑ´ïµ½ÉÏÏÞ£¬ÐÞ¸ÄinitSID.oraÖеÄprocessesµÄ´óС¡£
    4.ÖØÐÂÆô¶¯Êý¾Ý¿âµ½nomount״̬Ï£¬Ö´ÐÐcreate spfile from pfile; ²¢startup open¡£
    ²éѯÊý¾Ý¿â×ÔÆô¶¯ÒÔÀ´×î´óµÄ²¢·¢ÊýÁ¿
    ÐÞ¸Ä×î´óÁ¬½ÓÊý:
    alter system set processes = 300 scope = spfile;
    ÖØÆôÊý¾Ý¿â:
    shutdown immediate;
    startup;
    --²é¿´


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