内存调优问题

大佬们求问一下,尝试用文档里的建议调整过参数了,但是没有改变内存使用情况。加载数据集的时候还是显示OOM TiDB using >1G and TiKV using >3G。想求问一下大佬们是我忽略了那些参数吗?
tikv:

memory-usage-limit = "500MB"

[storage.block-cache]
capacity = "128MB"

[rocksdb]
max-background-jobs = 2
max-open-files = 100
max-total-wal-size = "300MB"
write-buffer-limit = "100MB"

tidb:

in-mem-slow-query-recent-num = 50

[performance]
# must be integer
server-memory-quota = 300000000


[tikv-client.copr-cache]
# The capacity in MB of the cache
capacity-mb = 100.0

[instance]
max_connections = 1000