Lazily initialize mapped varz counters before the first metric operation.

This will remove the counters for unused services and backend_groups, saving an expected >3GB in cloud L2 GFEs.

Also remove the /varz?dev option because the varz page will have much fewer zeros.

Verified on staging experiment GFEs:
Original: http://screen/S82rxFjOD4n
Lazy initialized varz: http://screen/G4CQkMa7rwU

Protected by FLAGS_gfe2_restart_flag_lazy_initialize_mapped_varz.

PiperOrigin-RevId: 339866745
Change-Id: Ie8818f518e24fecf0a31e9198f6ecbdbf893d494
1 file changed
tree: 981a11d617e4209d575796cbb33a1b8aa70bc60b
  1. common/
  2. epoll_server/
  3. http2/
  4. quic/
  5. spdy/
  6. CONTRIBUTING.md
  7. LICENSE
  8. README.md
README.md

QUICHE

QUICHE (QUIC, Http/2, Etc) is Google‘s implementation of QUIC and related protocols. It powers Chromium as well as Google’s QUIC servers and some other projects. QUICHE is only supported on little-endian platforms.