APCu memory limit

[es2007]

I use APCu to save memory for writing large workbook.
Setting apc.shm_size to 512M, and PHP memory_limit was 128M.

$pool = new \Cache\Adapter\Apcu\ApcuCachePool();
$simpleCache = new \Cache\Bridge\SimpleCache\SimpleCacheBridge($pool);

\PhpOffice\PhpSpreadsheet\Settings::setCache($simpleCache);

I got error below:

Allowed memory size of 134217728 bytes exhausted

apc.shm_size uses php memory_limit?
How can I save large file without changing php memory_limit?