generate documentation from config.sample.php

1 files changed, 23 insertions, 0 deletions

diff --git a/admin_manual/configuration_server/config_sample_php_parameters.rst b/admin_manual/configuration_server/config_sample_php_parameters.rst
index 9d6c26c82..1b30c2151 100644
--- a/admin_manual/configuration_server/config_sample_php_parameters.rst
+++ b/admin_manual/configuration_server/config_sample_php_parameters.rst
@@ -1302,6 +1302,29 @@ Defaults to ``true``
 
 ::
 
+	'preview_concurrency_all' => 8,
+
+Number of all preview requests being processed concurrently,
+including previews that need to be newly generated, and those that have
+been generated.
+
+This should be greater than 'preview_concurrency_new'.
+If unspecified, defaults to twice the value of 'preview_concurrency_new'.
+
+::
+
+	'preview_concurrency_new' => 4,
+
+Number of new previews that are being concurrently generated.
+
+Depending on the max preview size set by 'preview_max_x' and 'preview_max_y',
+the generation process can consume considerable CPU and memory resources.
+It's recommended to limit this to be no greater than the number of CPU cores.
+If unspecified, defaults to the number of CPU cores, or 4 if that cannot
+be determined.
+
+::
+
 	'preview_max_x' => 4096,
 
 The maximum width, in pixels, of a preview. A value of ``null`` means there