[Yandex Cloud documentation](../../index.md) > [Yandex StoreDoc](../index.md) > [Concepts](index.md) > Quotas and limits

# Yandex StoreDoc quotas and limits

Yandex StoreDoc has the following limitations:

* [_Quotas_](https://console.yandex.cloud/cloud?section=quotas) are organizational constraints that can be changed by contacting technical support.
* _Limits_ are technical constraints of the Yandex Cloud architecture. You cannot change the limits.

If you need more resources, you can increase your quotas in one of the following ways:

* [Make a request to increase your quotas](https://console.yandex.cloud/cloud?section=quotas).
* Contact [support](https://center.yandex.cloud/support) and specify which quotas you want increased and by how much.

To have your request processed, you must have the `quota-manager.requestOperator` [role](../../iam/roles-reference.md#quota-manager-requestoperator) or higher, e.g., `editor` or `admin`.

You can manage your quotas with [Cloud Quota Manager](../../quota-manager/quickstart.md).

#### Quotas {#mmg-quotas}

#|
|| Type of limit | Value ||
|| Number of clusters per cloud 
`mdb.clusters.count` | 16 ||
|| Total number of CPU cores for all database hosts per cloud 
`mdb.cpu.count` | 64 ||
|| Total virtual memory for all database hosts per cloud 
`mdb.memory.size` | 512 GB ||
|| Total storage capacity for all clusters per cloud 
`mdb.ssd.size` | 4,096 GB ||
|| Number of GPUs 
`mdb.gpu.count` | 0 ||
|#

#### Limits {#mmg-limits}

| Type of limit                                                                                                  | Minimum value                                                                             | Maximum value                            |
|:-----------------------------------------------------------------------------------------------------------------|:-------------------------------------------------------------------------------------------------|:-------------------------------------------------|
| Host class                                                                                                      | b1.medium (2 × [50%](../../compute/concepts/performance-levels.md) vCPU Intel Broadwell, 4 GB RAM) | m4a-c224-m1792 (224 vCPUs, AMD Zen 4, 1,792 GB RAM) |
| Number of shards per cluster                                                                                     | 1                                                                                          | 10                                               |
| Number of hosts per shard when using a network HDD or SSD storage or an ultra high-speed network SSD storage with three replicas | 1                                                                                          | 7                                                |
| Number of hosts in a shard when storing data on non-replicated or local SSDs^*^  | 3                                                                                          | 7                                                |
| Number of hosts per cluster                                                                               | 1 or 3 hosts depending on the [disk type](storage.md#storage-type-selection); the cluster [is created](../operations/cluster-create.md) in an unsharded state. | 70 (10 shards × 7 hosts)                        |
| Amount of data per host when using a network HDD or SSD storage.                | 10 GB                                                                                      | 2,048 GB                                        |
| Amount of data per host when using a non-replicated SSD storage or an ultra high-speed network SSD storage with three replicas | 93 GB                                                                                      | 2,232 GB                                        |
| Amount of data per host when using a local SSD storage (for Intel Broadwell and Intel Cascade Lake)                            | 100 GB                                                                                     | 1,500 GB                                        |
| Amount of data per host when using a local SSD storage (for Intel Ice Lake and AMD Zen 4) | 368 GB                                                                                     | 5888 GB                                        |
| Number of databases per cluster                                                                           | 1                                                                                          | 1000                                           |

^*^ Read more on how platform selection affects [available storage types](storage.md).

The maximum available number of simultaneous connections to a single Yandex StoreDoc cluster host depends on the amount of RAM on the host:

| Amount of RAM | Maximum number of connections |
| ------------------------:| -----------------------------------:|
| 2 GB | 2048 |
| 4 GB | 4096 |
| 8 GB | 8192 |
| 16 GB or higher | 16 384 |