I'm getting errors when I use the

queue:
   spool:
      file:

feature

not enough memory to allocate 255 data page

2019-05-10T18:28:10.029Z ERROR [publisher] spool/inbroker.go:544 Spool flush failed with: pq/writer-flush: txfile/tx-alloc-pages: file='/var/lib/statsdbeat/spool.dat' tx=0: transaction failed during commit: not enough memory to allocate 255 data page(s)

This is running on a server with 4Gb of memory. What configuration settings are there to reduce the number of data pages.

Thanks