Missing dynamic Markers GMaps V3 - ajax

Question

I have written some code to fetch zipcodes from a mysql db via ajax call, geocode them, then make markers out of them on a GMap. The markers are clickable to reveal some demographic data. It works if i leave the alert in the each loop uncommented. If not it only shows about 8 markers. Any and all help is appreciated. Relevant code:
function initialize() {
var geocoder = new google.maps.Geocoder();
var markers = [];
var latlng = new google.maps.LatLng("33.7463915", "-117.86044720000001");
var myOptions = {
zoom: 11,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
$.ajax({
url: 'getzips.php',
dataType: 'json',
success: function (data) {
$.each(data.rows, function(i, item) {
//alert(item.zip);
if (geocoder) {
geocoder.geocode({ 'address': item.zip }, function (results, status) {
if (status == google.maps.GeocoderStatus.OK) {
var latlng = new google.maps.LatLng(results[0].geometry.location.lat(), results[0].geometry.location.lng());
var marker = new google.maps.Marker({
position: latlng,
map: map,
title: item.zip
});
var infowindow = new google.maps.InfoWindow({
content: item.zip
});
google.maps.event.addListener(marker, "click", function() {
$.ajax({
url: 'getinfo.php?zipcode=' + marker.title,
success: function(data){
infowindow.setContent(data);
infowindow.open(map, marker);
}
});
});
markers.push(marker);
}
});
}
else
alert("geocode error");
});
}
});
//alert(markers.length);
}

Answer 1

Google Geocoding API has both query and rate limits. You need to slow down when querying.
Use of the Google Geocoding API is subject to a query limit of 2,500 geolocation requests per day.
Additionally, we enforce a request rate limit to prevent abuse of the service.