kovbo

kovbo

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Level 1
1,200 XP
Dec
05
1 month ago
Activity icon

Awarded Best Reply on WhereHas Performance Issue In A Big Database

@snapey @jlrdw You both saved my day!

Not sure why I included the "get()" statement (actually it paginated my results properly working as an API with a spatie query builder), but removing get() and the most important adding indexes heled a lot!

Actually, I did not use indexes before in my small projects, and I think this was a huge mistake.

Just added $table->index('tag'); to the posts table, and it worked fine.

Activity icon

Replied to WhereHas Performance Issue In A Big Database

@jlrdw You both helped me and pointed out my mistakes. Not sure what was the main problem here: indexes or get(), the most important is that the issue is solved.

And moreover, I do not want to offend anyone of you by choosing the "best answer". Not to offend you guys, I will choose my comment as the best, hah :)

Activity icon

Replied to WhereHas Performance Issue In A Big Database

@snapey @jlrdw You both saved my day!

Not sure why I included the "get()" statement (actually it paginated my results properly working as an API with a spatie query builder), but removing get() and the most important adding indexes heled a lot!

Actually, I did not use indexes before in my small projects, and I think this was a huge mistake.

Just added $table->index('tag'); to the posts table, and it worked fine.

Activity icon

Started a new Conversation WhereHas Performance Issue In A Big Database

Hi guys, I have a significant performance issue in a simple scope. The scope uses WhereHas for a table that contains 80k records.

Let's imagine a forum has 1.000 users and 100.000 posts. I want to display all users that have posts with a 'Foo' tag.

public function scopeHasPostsWithTag(Builder $query, $tag)
    {

            return $query->whereHas('posts', function ($query) use ($tag) {
                $query->where('tag', $tag);
            })->get();

    }

This query executes minutes. Sometimes it results in a timeout error. I assume it reads all 100k records for each user.

Is it possible to speed up this query?

I thought about caching the whole query, but the data always changes. I have to clear the cache after every new post.

It would be perfect to use a cached function like hasPostsWithTags($tag) for each user individually and after that build scopes based on this function. But I believe it is not possible...

How to deal with it?