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knex

const pool = new Pool({
// 最小 2 - 推荐 0
min: 2,

// 最大 - 根据场景性能要求调整
max: 10,

// acquire promises are rejected after this many milliseconds
// if a resource cannot be acquired
acquireTimeoutMillis: 30000,

// create operations are cancelled after this many milliseconds
// if a resource cannot be acquired
createTimeoutMillis: 30000,

// destroy operations are awaited for at most this many milliseconds
// new resources will be created after this timeout
destroyTimeoutMillis: 5000,

// Free resources are destroyed after this many milliseconds.
// Note that if min > 0, some resources may be kept alive for longer.
// To reliably destroy all idle resources, set min to 0.
idleTimeoutMillis: 30000,

// how often to check for idle resources to destroy
reapIntervalMillis: 1000,

// how long to idle after failed create before trying again
createRetryIntervalMillis: 200,

// If true, when a create fails, the first pending acquire is
// rejected with the error. If this is false (the default) then
// create is retried until acquireTimeoutMillis milliseconds has
// passed.
propagateCreateError: false
});

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