May I ask the batchsize you set during training and how many Gpus you use to train ?

[UrlyBoy]

Why did I set my batchsize to 32 and train 240 epochs with single GPU to get only about 72 mAP ?

[UrlyBoy]

The training set is VOC 2007+2012 trainval and the test set is VOC2007 test.

[midasklr]

batch size 64, 300 epochs, 4*TitanX,
u may try with:
1)warmup
2)lr scheduler