The greatest certainty in racing is that Chris Waller will set a new Sydney training record but just when that happens is up to the weather.

Waller has already trained 153-1/2 winners this season as he forges towards the 156 set by TJ Smith in 1976-76 and equalled by his daughter Gai Waterhouse in 2002-03.

He also ended the Australian Group One season on top of the trainers' list, extending his tally to nine with Red Tracer's win in Saturday's Tatt's Tiara at Eagle Farm.

Racing at Randwick on Saturday was abandoned after three races and Tuesday's Warwick Farm track will be scrutinised on Monday ahead of its scheduled meeting a day later.

Waller still has plenty of time to establish a new mark with the final meeting of the season on July 31 at Warwick Farm.

"Hopefully we can do it in the next week or so," Waller said.

"Obviously it will be very satisfying for me and the staff.

"But it's work as normal. It won't change my life. I will continue on training 52 weeks of the year."

He said he didn't set goals because that only led to disappointment when things didn't come off but has his third Sydney premiership wrapped up.

In little more than a decade, the former New Zealander has built a formidable team bolstered by European imports originally bought to keep the stable active during the winter months.

Waller sourced horses from the Tattersalls sale in England because he couldn't afford to buy yearlings in Australia.

That has certainly changed as has the opportunity to buy reasonably-priced tried horses overseas.

Leviathan owner Lloyd Williams has said he won't buy any more from Europe because the Australian interest has hiked up the costs and Waller agrees.

"It's harder now," he said.

"We are looking outside England at other places like Germany."

The other big development for Waller this season has been the establishment of a satellite stable in Melbourne.

"It is a help because we can split the horses and not have them running against each other in Sydney," he said.

"It's all about getting the most for the owners so they keep coming back and want to race horses."