Após a conversa com @Pieter Goosennos comentários dapergunta,acho queposso responder aperguntae explicarmeuerro.

A chave é que found_posts estavame confusando.Eu acho queessenúmero é osposts recuperados,masnão é. é onúmero depostagens que correspondem aos critérios .É como o WP_Query tinha 2partes: umparaencontrar (todos) aspostagense outrasparabuscar o conteúdo,quandoele verificapara o paginação parâmetros.Portanto,temos o $ Post_Count propriedade que é onúmero depostagensfetched (Codex diz Onúmero depostagensexibidas ),que,claro,éigual aonúmerono Posts_per_Page parâmetroe onúmero deitensno $posts propriedade damatriz.

Então wp_query nãoestáfazendonenhumtrabalhoinútil,comoeupensava ^^

Espero queisso ajude os outros!

After the conversation with @Pieter Goosen on the comments of the question, I think I can answer the question and explain my mistake.

The key is that found_posts was confussing me. I thougth that, that number is the posts retrieved but is not. It is the number of posts that match the criteria. It's like the WP_Query had 2 parts: one for finding (all) the posts, and other for fetching the content, when it checks for the pagination parameters. So we have the $post_count property that is the number of posts fetched (Codex says The number of posts being displayed), that of course is equal to the number on posts_per_page parameter, and the number of items on the $posts array property.

So WP_Query is not doing any useless work, as I thought ^^

Hope this helps others!

OK,permiteter umtipo depostagem chamado 'blog_posts',e você querbuscar 5posts dessetipo depostagem.Aquiestá o que vocêprecisafazer

  $ args=array (
        'post_type'=>'postagensnoblog',
        'posts_per_page'=>'5',
);


$ query=novo WP_Query ($ args);
 

A consulta acima retornará 5posts dotipo 'blog_posts',senãofor umtipo depostagempersonalizado,basta substituir comoeste 'post_type'=>'Postagens', Se você quiserbuscartodas aspostagens,substitua comoeste 'posts_per_page'=>'-1',,paramais detalhes consulta WP

Ok , lets you have post type called 'blog_posts' , and you want to fetch 5 posts of that post type . Here is what you need to do

$args = array(
        'post_type' => 'blog_posts',
        'posts_per_page' => '5',
);


$query = new WP_Query($args);

The above query will return 5 posts of type 'blog_posts' , if it is not a custom post type , then just replace like this 'post_type' => 'posts', if you want to fetch all posts then replace like this 'posts_per_page' => '-1', , for more details WP Query

Eu sei que @ user1750063mencionou o código,mastente este

 $args = array (
    'post_type'              => 'custom_post',
    'nopaging'               => false,
    'posts_per_page'         => '5',
    'order'                  => 'DESC',
    'orderby'                => 'ID',
);

$query = new WP_Query( $args );

if ( $query->have_posts() ) {
    while ( $query->have_posts() ) {
        $query->the_post();
        // display content
    }
} else {
    // display when no posts found
}

wp_reset_postdata();     // Restore original Post Data
 

I know that @user1750063 has mentioned the code but try this

$args = array (
    'post_type'              => 'custom_post',
    'nopaging'               => false,
    'posts_per_page'         => '5',
    'order'                  => 'DESC',
    'orderby'                => 'ID',
);

$query = new WP_Query( $args );

if ( $query->have_posts() ) {
    while ( $query->have_posts() ) {
        $query->the_post();
        // display content
    }
} else {
    // display when no posts found
}

wp_reset_postdata();     // Restore original Post Data

Euiria limitá-lo com campospersonalizados,verifiqueesta amostra de consulta abaixo:

 $wp_query = new WP_Query("orderby=DESC&post_type=portfolio&meta_key=FeaturedProject&meta_value=1&posts_per_page=6");
 

Devolverá 6projetosem destaque.

I would limit it with custom fields, check this query sample below:

$wp_query = new WP_Query("orderby=DESC&post_type=portfolio&meta_key=FeaturedProject&meta_value=1&posts_per_page=6");

It will return 6 Featured projects.