How to change the size of shared data buffers

In general, default settings should work for most of the installation. However, if the server has enough free memory, you can change the size of shared data buffers by creating the following file(s) on the media server. In the files, enter an integer size in bytes for the shared data buffer. The integer should be a multiple of 1024 (a multiple of 32 kilobytes is recommended).

Linux/UNIX
For tape:
```
/usr/openv/netbackup/db/config/SIZE_DATA_BUFFERS
```
The SIZE_DATA_BUFFERS value determines the shared memory buffer size for all types of backups if none of the following SIZE_DATA_BUFFERS_xxxx files exist.
For tape (NDMP storage units):
```
/usr/openv/netbackup/db/config/SIZE_DATA_BUFFERS_NDMP
```
For disk:
```
/usr/openv/netbackup/db/config/SIZE_DATA_BUFFERS_DISK
```
The SIZE_DATA_BUFFERS_DISK file also affects NDMP to disk backups.
For multiple copies (Inline Copy):
```
/usr/openv/netbackup/db/config/SIZE_DATA_BUFFERS_MULTCOPY
```
For the FT media server:
```
/usr/openv/netbackup/db/config/SIZE_DATA_BUFFERS_FT
```
Windows
For tape:
```
install_path\NetBackup\db\config\SIZE_DATA_BUFFERS
```
The SIZE_DATA_BUFFERS value determines the shared memory buffer size for all types of backups if none of the following SIZE_DATA_BUFFERS_xxxx files exist.
For tape (NDMP storage units):
```
install_path\NetBackup\db\config\SIZE_DATA_BUFFERS_NDMP
```
For disk:
```
install_path\NetBackup\db\config\SIZE_DATA_BUFFERS_DISK
```
The SIZE_DATA_BUFFERS_DISK file also affects NDMP to disk backups.
For multiple copies (Inline Copy):
```
install_path\NetBackup\db\config\SIZE_DATA_BUFFERS_MULTCOPY
```
For the FT media server:
Note: The FT media server is not yet supported on Windows.

More Information

Notes on size data buffer files

Testing changes made to shared memory

How to change the size of shared data buffers

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