To fix

ALTER SYSTEM SET statistics_level = TYPICAL Comment='Juantxu' SCOPE=BOTH
/
ALTER SYSTEM SET sga_max_size = 314572800 Comment='Juantxu' SCOPE=SPFILE
/
ALTER SYSTEM SET sga_target = 314572800 Comment='Juantxu' SCOPE=BOTH
/
ALTER SYSTEM SET open_cursors=900 Comment='Juantxu' SCOPE=BOTH
/
ALTER SYSTEM SET processes=300 COMMENT='Juantxu' SCOPE=SPFILE;
/
ALTER SYSTEM SET sessions=300 COMMENT='Juantxu' SCOPE=SPFILE;
/