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Demora em atualizar estrura tabela mysql


INFORMAIs
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Amigos estou tendo problemas para criar um campo novo em uma tabela com mais de 10 milhões de registros.
Faço mais ou menos assim.


ALTER TABLE ctrc_nf ADD campo char(80) not null AFTER fone; 

Daí demora demais mais de uma hora.
O servidor e Linux, 

(SERVIDOR LENOVO RD640/ E5-2630V2/8GB/2XSAS300GB) 

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Será que tem como melhorar isso. 

Edited by INFORMAIs
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