MySQL server has gone away on geoname allcountriess - php

Question

i'm tring to add geoname allcountries in my database
after adding some data show MySQL server has gone away
allmost after 37890 rows then show show MySQL server has gone
DROP TABLE IF EXISTS `geo_allcountries`;
CREATE TABLE `geo_allcountries` (
`geonameid` INT(11) NOT NULL,
`name` VARCHAR(200) DEFAULT NULL,
`asciiname` VARCHAR(200) DEFAULT NULL,
`alternatenames` VARCHAR(4000) DEFAULT NULL,
`latitude` DECIMAL(10 , 7 ) DEFAULT NULL,
`longitude` DECIMAL(10 , 7 ) DEFAULT NULL,
`fclass` CHAR(1) DEFAULT NULL,
`fcode` VARCHAR(10) DEFAULT NULL,
`country` VARCHAR(2) DEFAULT NULL,
`cc2` VARCHAR(60) DEFAULT NULL,
`admin1` VARCHAR(20) DEFAULT NULL,
`admin2` VARCHAR(80) DEFAULT NULL,
`admin3` VARCHAR(20) DEFAULT NULL,
`admin4` VARCHAR(20) DEFAULT NULL,
`population` INT(11) DEFAULT NULL,
`elevation` INT(11) DEFAULT NULL,
`gtopo30` INT(11) DEFAULT NULL,
`timezone` VARCHAR(40) DEFAULT NULL,
`moddate` DATE DEFAULT NULL,
PRIMARY KEY (`geonameid`),
KEY `name` (`name`),
KEY `asciiname` (`asciiname`),
KEY `latitude` (`latitude`),
KEY `longitude` (`longitude`),
KEY `fclass` (`fclass`),
KEY `fcode` (`fcode`),
KEY `country` (`country`),
KEY `cc2` (`cc2`),
KEY `admin1` (`admin1`),
KEY `population` (`population`),
KEY `elevation` (`elevation`),
KEY `timezone` (`timezone`)
) ENGINE=MYISAM DEFAULT CHARSET=UTF8 COLLATE UTF8_UNICODE_CI;
ALTER TABLE `geo_allcountries` DISABLE KEYS;
LOAD DATA LOCAL INFILE 'D:/allCountries.txt'
INTO TABLE `geo_allcountries`
CHARACTER SET 'UTF8';
ALTER TABLE `geo_allcountries`
ADD COLUMN `fclasscode` CHAR(7) CHARACTER SET 'utf8' COLLATE 'utf8_unicode_ci' NULL DEFAULT NULL AFTER `fcode`;
UPDATE `geo_allcountries`
SET
`fclasscode` = CONCAT(`fclass`, '.', `fcode`);
UPDATE `geo_allcountries`
SET `fclasscode` = ''
WHERE
`fclasscode` NOT REGEXP '[A-Z]{1}.[A-Z]{1,5}';
ALTER TABLE `geo_allcountries` ADD INDEX `fclasscode` (`fclasscode` ASC);
ALTER TABLE `geo_allcountries` ENABLE KEYS;
add this line have the same error
SET FOREIGN_KEY_CHECKS = ON;
php config
max_allowed_packet = 2048M
$cfg['ExecTimeLimit'] =0;
with this same error
$cfg['ExecTimeLimit'] =3000;
post_max_size=1800M
upload_max_filesize=2048M
max_execution_time=2048
max_input_time=1700M
memory_limit=1048M
file size of geoname allcountries.txt file is 1.38GB
how to solve this and where is a problem
I spend much time on this issue but i'm unable to slove
please find out and how to solve this