Timoshenko, M.V. Aktershev, Yu. Belikov, O.V. Berkaev, D.E. Burenkov, D.B. Druzhinin, V.P. Gorchakov, K. Karpov, G.V. Kasaev, A.S. Kirpotin, A.N. Kladov, S.A. Koop, I. Kupurzhanov, A.V. Kurkin, G.Y. Lyalin, M.A. Lysenko, A.P. Motygin, S.V. Otboev, A.V. Pavlenko, A.V. Perevedentsev, E. Prosvetov, V.P. Rogovsky, Yu.A. Semenov, A.M. Senchenko, A.I. Serdakov, L.E. Shatunov, P.Yu. Shatunov, Y.M. Shwartz, D.B. Yudin, V.D. Zemlyansky, I.M. Zharinov, Yu.M. JACoW Publishing Geneva, Switzerland 2673-5539 978-3-95450-240-0 10.18429/JACoW-RuPAC2021-TUY01 English 28-33 luminosity collider operation vacuum detector Contribution to a conference proceedings 2021 2021-10 https://doi.org/10.18429/JACoW-RuPAC2021-TUY01 https://jacow.org/rupac2021/papers/tuy01.pdf VEPP-2000 is the only electron-positron collider operating with a round beam permitting to increase the limit of beam-beam effects. VEPP-2000 is the compact collider with 24.4 m-circumference which has record luminosity at energy up to 1 GeV per bunch (1032 1/cm²s), magnetic fields in superconducting solenoids (13 T) and in the bending magnets (2.4 T). Collider complex experimental program of 2019-2021 was focused on several energy ranges per bunch. Energy range in the second half of 2019 was 180-300 MeV, in the first half of 2020 ¿ 935-970 MeV, in the first half of 2021 - 970-1003.5 MeV. Data taking was carried out by CMD-3 and SND detectors and operation efficiency is compared with previous runs. Luminosity was limited by beam-beam effects. 2021 year was clouded by vacuum accident and subsequent intensive degassing using beam synchrotron radiation.