On Christmas Day, I left the kitchen midmorning for a few hours’ sleep and returned in the afternoon to bake the final items, and to decorate, label, and platter my contributions to the big feed. When I finished, I sat down, inhaling the earthy holiday smell—a mix of stuffing, cheap red wine, and bodies perspiring in the unusual warmth of the room. Every so often, I got up to replace a cake or deliver a fresh plate of cookies. I wanted to be certain that the rosy-cheeked mechanics and heavy-equipment operators, nearly unrecognizable without their insulated, chocolate-brown Carhartt overalls, weren’t deprived of any pleasure. At the end of the galley, the strangers I’d slowly come to know gripped blue plastic trays as they moved down the length of the steam table, heaping duck, potatoes, gravy, roast beef, and peas onto their plates. I watched them collect pats of shiny foil-wrapped butter to smear on the pillowy white rolls I’d made. I hoped that they’d like them, and that I’d made enough for everyone. ♦
the top type for nominally-typed values, exn.
- Harrison Sullivan。WhatsApp Web 網頁版登入对此有专业解读
В Финляндии отказались поддержать изменения в законе о ядерном оружии14:59
。关于这个话题，谷歌提供了深入分析
Classic mutations work by rewriting whole data parts containing the affected columns. This process relies on the same thread pool as merges. In self-managed replicated environments, each replica must apply the mutation independently. For this reason, mutations are both CPU and IO-intensive and should be scheduled cautiously with permission to run limited to administrators. Resource pressure as a result of mutations manifests itself in several ways. Typically, normally scheduled merges accumulate, which in turn causes our earlier "too many parts" issue. Furthermore, users may experience replication delays. The system.mutations table should give administrators an indication of currently scheduled mutations. Note that mutations can be cancelled, but not rolled back, with the KILL MUTATION query.
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