# memlimits

##### Query and Set Heap Size Limits

Query and set the maximal size of the vector heap and the maximal number of heap nodes for the current R process.

- Keywords
- utilities

##### Usage

```
mem.maxVSize(vsize = 0)
mem.maxNSize(nsize = 0)
```

##### Arguments

- vsize
numeric; new size limit in Mb.

- nsize
numeric; new maximal node number.

##### Details

New Limits lower than current usage are ignored.
Specifying a size of `Inf`

sets the limit to the maximal possible
value for the platform.

The default maximal values are unlimited on most platforms, but can be
adjusted using environment variables as described in
`Memory`

. On macOS a lower default vector heap limit is
used to protect against the R process being killed when macOS
over-commits memory.

Adjusting the maximal number of nodes is rarely necessary. Adjusting the vector heap size limit can be useful on macOS in particular but should be done with caution.

##### Value

The current or new value, in Mb for `mem.maxVSize`

. `Inf`

is
returned if the current value is unlimited.

##### See Also

*Documentation reproduced from package base, version 3.6.0, License: Part of R 3.6.0*