我们的以太坊网络节点在10月24日崩溃，出现了许多错误响应“需要身份验证：密码或解锁”。 QPS约为1〜2，非常低。根据我们的ab测试，该节点最多可以支持60个QPS无效请求。
这是日志
WARN [10-24|18:29:47.975] Served eth_signTransaction conn=45.76.106.157:6362 reqid=84 t=98.264µs err="authentication needed: password or unlock"
WARN [10-24|18:29:48.062] Served eth_signTransaction conn=144.48.63.243:50830 reqid=51 t=64.547µs err="authentication needed: password or unlock"
INFO [10-24|18:29:48.224] Setting new local account address=0x40A49838dd7f61666258254a2D9f611eFC408800
INFO [10-24|18:29:48.232] Submitted transaction fullhash=0x699e9c6d24198c0bff1edf147ee133eb6c2acc326bf8e1becff635b2035b6a78 recipient=0x2E65E12b5f0fD1D58738c6F38dA7D57F5F183d1c
fatal error: runtime: out of memory
runtime stack:
runtime.throw(0x10e662b, 0x16)
/usr/lib/go-1.11/src/runtime/panic.go:608 +0x72
runtime.sysMap(0xc47c000000, 0x10000000, 0x23bc178)
/usr/lib/go-1.11/src/runtime/mem_linux.go:156 +0xc7
runtime.(*mheap).sysAlloc(0x238d3e0, 0x10000000, 0x680031f220, 0x7fe5bdffacd8)
/usr/lib/go-1.11/src/runtime/malloc.go:619 +0x1c7
runtime.(*mheap).grow(0x238d3e0, 0x8000, 0x0)
/usr/lib/go-1.11/src/runtime/mheap.go:920 +0x42
runtime.(*mheap).allocSpanLocked(0x238d3e0, 0x8000, 0x23bc188, 0x0)
/usr/lib/go-1.11/src/runtime/mheap.go:848 +0x337
runtime.(*mheap).alloc_m(0x238d3e0, 0x8000, 0x101, 0x149c0f8)
/usr/lib/go-1.11/src/runtime/mheap.go:692 +0x119
runtime.(*mheap).alloc.func1()
/usr/lib/go-1.11/src/runtime/mheap.go:759 +0x4c
runtime.(*mheap).alloc(0x238d3e0, 0x8000, 0x7fe5bd010101, 0x43ada0)
/usr/lib/go-1.11/src/runtime/mheap.go:758 +0x8a
runtime.largeAlloc(0x10000000, 0x460101, 0xc46c000000)
/usr/lib/go-1.11/src/runtime/malloc.go:1019 +0x97
runtime.mallocgc.func1()
/usr/lib/go-1.11/src/runtime/malloc.go:914 +0x46
runtime.systemstack(0x0)
/usr/lib/go-1.11/src/runtime/asm_amd64.s:351 +0x66
runtime.mstart()
/usr/lib/go-1.11/src/runtime/proc.go:1229
...