---
title: High Memory Usage While Rebuilding Indexes
slug: '2309'
canonical_url: https://docs.coveo.com/en/2309/
collection: coveo-for-sitecore-v5
source_format: adoc
---
# High Memory Usage While Rebuilding Indexes
## Symptoms

When attempting to rebuild the Coveo indexes, the Sitecore instance uses all the available memory.
The IIS process then restarts and the rebuild can't complete.

## Cause

When enabled, the `Caching.DisableCacheSizeLimits` setting unlocks the memory limit that the Sitecore caches can use.

## Resolution

Set the value of the `Caching.DisableCacheSizeLimits` setting to `false`.

You can use the `\https://<INSTANCE_HOSTNAME>/sitecore/admin/cache.aspx` page to monitor the amount of memory used by each of the Sitecore caches.
A good place to start is to tune the database caches:

. Open the `<SITECORE_INSTANCE_ROOT>\App_Config\Sitecore.config` file in a text editor.
. Find the database configuration.

```xml
<database id="master" singleInstance="true" type="Sitecore.Data.DefaultDatabase, Sitecore.Kernel" role:require="ContentManagement">
  <param desc="name">$(id)</param>
   ...
```

. Inside the database configuration, you will find a `<cacheSizes>` element.
You can then adjust the cache size to suit your needs.

```xml
 <cacheSizes hint="setting">
   <data>100MB</data>
   <items>50MB</items>
   <paths>2500KB</paths>
   <itempaths>50MB</itempaths>
   <standardValues>2500KB</standardValues>
 </cacheSizes>
```

. Test run your site and look at the `cache.aspx` page to see which caches are underused and which are overused.
Tweak values as necessary.