diff --git a/docs/Node Operators/configuration-variables.md b/docs/Node Operators/configuration-variables.md
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--- a/docs/Node Operators/configuration-variables.md	
+++ b/docs/Node Operators/configuration-variables.md	
@@ -6,177 +6,372 @@ permalink: "docs/configuration-variables/"
 whatsnext: {"Enabling HTTPS Connections":"/docs/enabling-https-connections/"}
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 ---
-## ALLOW_ORIGINS
-- Default: "http://localhost:3000,http://localhost:6688"
 
-Specifies the addresses/URLs of allowed connections to the API on `CLIENT_NODE_URL`. Input may be a comma-separated (no spaces) list.
+Recent versions of Chainlink ship with sensible defaults for most configuration variables.
+
+Not all env vars are documented here. Any env var that is undocumented is subject to change in future releases. In almost all cases, you should leave any env var not listed here to its default value unless you really understand what you are doing.
+
+To reiterate: _if you have an env var set that is not listed here, and you don't know exactly why you have it set, you should remove it!_
+
+The env variables listed here are explicitly supported and current as of Chainlink 0.10.6.
+
+NOTE: Some env vars require a duration. A duration string is a possibly signed sequence of decimal numbers, each with optional fraction and a unit suffix, such as "300ms", "-1.5h" or "2h45m". Valid time units are "ns", "us" (or "µs"), "ms", "s", "m", "h". Some examples:
+
+`10ms`
+`1h15m`
+`42m30s`
+
+- [Essential env vars](#essential-env-vars)
+  - [DATABASE_URL](#database_url)
+  - [ETH_CHAIN_ID](#eth_chain_id)
+  - [ETH_URL](#eth_url)
+  - [LINK_CONTRACT_ADDRESS](#link_contract_address)
+- [Recommended env vars](#recommended-env-vars)
+  - [ETH_HTTP_URL](#eth_http_url)
+  - [ETH_SECONDARY_URLS](#eth_secondary_urls)
+- [OCR](#ocr)
+  - [FEATURE_OFFCHAIN_REPORTING](#feature_offchain_reporting)
+  - [P2P_ANNOUNCE_IP](#p2p_announce_ip)
+  - [P2P_ANNOUNCE_PORT](#p2p_announce_port)
+  - [P2P_BOOTSTRAP_PEERS](#p2p_bootstrap_peers)
+  - [P2P_LISTEN_IP](#p2p_listen_ip)
+  - [P2P_LISTEN_PORT](#p2p_listen_port)
+  - [P2P_PEER_ID](#p2p_peer_id)
+- [TLS](#tls)
+  - [CHAINLINK_TLS_HOST](#chainlink_tls_host)
+  - [CHAINLINK_TLS_PORT](#chainlink_tls_port)
+  - [CHAINLINK_TLS_REDIRECT](#chainlink_tls_redirect)
+  - [TLS_CERT_PATH](#tls_cert_path)
+  - [TLS_KEY_PATH](#tls_key_path)
+- [Gas price tuning](#gas-price-tuning)
+  - [ETH_GAS_BUMP_PERCENT](#eth_gas_bump_percent)
+  - [ETH_GAS_BUMP_THRESHOLD](#eth_gas_bump_threshold)
+  - [ETH_GAS_PRICE_DEFAULT](#eth_gas_price_default)
+  - [ETH_MAX_GAS_PRICE_WEI](#eth_max_gas_price_wei)
+  - [ETH_MIN_GAS_PRICE_WEI](#eth_min_gas_price_wei)
+  - [GAS_UPDATER_ENABLED](#gas_updater_enabled)
+  - [GAS_UPDATER_TRANSACTION_PERCENTILE](#gas_updater_transaction_percentile)
+- [Other env vars](#other-env-vars)
+  - [ADMIN_CREDENTIALS_FILE](#admin_credentials_file)
+  - [ALLOW_ORIGINS](#allow_origins)
+  - [CHAINLINK_PORT](#chainlink_port)
+  - [CLIENT_NODE_URL](#client_node_url)
+  - [DATABASE_BACKUP_FREQUENCY](#database_backup_frequency)
+  - [DATABASE_BACKUP_MODE](#database_backup_mode)
+  - [DATABASE_BACKUP_URL](#database_backup_url)
+  - [ETH_DISABLED](#eth_disabled)
+  - [EXPLORER_URL](#explorer_url)
+  - [EXPLORER_ACCESS_KEY](#explorer_access_key)
+  - [EXPLORER_SECRET](#explorer_secret)
+  - [JSON_CONSOLE](#json_console)
+  - [LOG_LEVEL](#log_level)
+  - [LOG_SQL](#log_sql)
+  - [LOG_SQL_MIGRATIONS](#log_sql_migrations)
+  - [LOG_TO_DISK](#log_to_disk)
+  - [MIN_INCOMING_CONFIRMATIONS](#min_incoming_confirmations)
+  - [MINIMUM_CONTRACT_PAYMENT](#minimum_contract_payment)
+  - [OPERATOR_CONTRACT_ADDRESS](#operator_contract_address)
+  - [ORM_MAX_IDLE_CONNS](#orm_max_idle_conns)
+  - [ORM_MAX_OPEN_CONNS](#orm_max_open_conns)
+  - [ROOT](#root)
+  - [SECURE_COOKIES](#secure_cookies)
+  - [SESSION_TIMEOUT](#session_timeout)
+
+# Essential env vars
 
-## BLOCK_BACKFILL_DEPTH
-- Default: "10"
+## DATABASE_URL
 
-Specifies the number of blocks before the current HEAD that the log broadcaster will try to re-consume logs from.
+**Required**
 
-## BRIDGE_RESPONSE_URL
 - Default: _none_
 
-Represents the URL for bridges to send a response to.
+The PostgreSQL URI to connect to your database. See the [Running a Chainlink Node](../running-a-chainlink-node/#set-the-remote-database_url-config) for an example.
 
-## CHAINLINK_DEV
-- Default: "false"
+## ETH_CHAIN_ID
 
-Configures "development" mode. Allows for use of the `/service_agreements` endpoint. Development purposes only. New features will occasionally be placed behind the "dev" flag, which refers to this configuration variable.
+- Default: `"1"` (Ethereum mainnet)
 
-## CHAINLINK_PORT
-- Default: "6688"
+Chainlink currently only supports one chain at a time. This var specifies the chain ID to use for transactions. It must match the chain ID of the connected RPC node.
 
-Port used for the [API Reference](../api-reference/) and GUI.
+```
+curl -k -X POST -H 'Content-Type: application/json' -d '{"jsonrpc":"2.0","method":"eth_chainId","id":1}' http://localhost:8545
+```
+
+## ETH_URL
+
+- Default: `"ws://localhost:8546"`
+
+This is the websocket address of the Ethereum client that the Chainlink node will connect to. All interaction with the Ethereum blockchain will occur through this connection.
+
+## LINK_CONTRACT_ADDRESS
+
+- Default: `"0x514910771AF9Ca656af840dff83E8264EcF986CA"` (Ethereum mainnet)
+
+The address of the LINK token contract. Used for displaying the node account's LINK balance. This should be set based on your chain ID.
+
+# Recommended env vars
+
+## ETH_HTTP_URL
+
+- Default: _none_
+
+This should be set to the http URL that points to the same eth node as the primary. If set, Chainlink will automatically use HTTP mode for heavy requests, which can improve reliability.
+
+## ETH_SECONDARY_URLS
+
+- Default: _none_
+
+If set, transactions will also be broadcast to this secondary ethereum node. This allows transaction broadcasting to be more robust in the face of primary ethereum node bugs or failures.
+
+It is recommended to set at least one secondary eth node here that is different from your primary.
+
+Multiple URLs can be specified as a comma-separated list e.g.
+
+`ETH_SECONDARY_URLS=https://example.com/1,https://example.text/2,...`
+
+# OCR
+
+This section only applies if you are running offchain reporting jobs.
+
+## FEATURE_OFFCHAIN_REPORTING
+
+- Default: `"false"`
+
+Set to true to enable OCR jobs.
+
+## P2P_ANNOUNCE_IP
+
+- Default: _none_
+
+Should be set as the externally reachable IP address of the chainlink node.
+
+## P2P_ANNOUNCE_PORT
+
+- Default: _none_
+
+Should be set as the externally reachable port of the chainlink node.
+
+## P2P_BOOTSTRAP_PEERS
+
+- Default: _none_
+
+Default set of bootstrap peers.
+
+## P2P_LISTEN_IP
+
+- Default: `"0.0.0.0"`
+
+The default IP address to bind to.
+
+## P2P_LISTEN_PORT
+
+- Default: _none_
+
+The port to listen on. If left blank, chainlink will randomly select a different port each time it boots. It is highly recommended to set this to a static value to avoid network instability.
+
+## P2P_PEER_ID
+
+- Default: _none_
+
+The default peer ID to use for OCR jobs. If unspecified, uses the first available peer ID.
+
+# TLS
+
+This section applies if you want to enable TLS security on your chainlink node.
 
 ## CHAINLINK_TLS_HOST
+
 - Default: _none_
 
 The hostname configured for TLS to be used by the Chainlink node. This is useful if you've configured a domain name specific for your Chainlink node.
 
 ## CHAINLINK_TLS_PORT
-- Default: "6689"
 
-The port used for HTTPS connections.
+- Default: `"6689"`
+
+The port used for HTTPS connections. Set to 0 to disable HTTPS (disabling HTTPS also relieves Chainlink of the requirement for a TLS certificate).
 
 ## CHAINLINK_TLS_REDIRECT
-- Default: "false"
+
+- Default: `"false"`
 
 Forces TLS redirect for unencrypted connections.
 
-## CHAINLINK_TX_ATTEMPT_LIMIT
-- Default: "10"
+## TLS_CERT_PATH
 
-Represents the maximum number of transaction attempts that the Chainlink node should allow to for a transaction.
+- Default: _none_
 
-## CLIENT_NODE_URL
-- Default: "http://localhost:6688"
+Location of the TLS certificate file. Example: `/home/$USER/.chainlink/tls/server.crt`
 
-This is the URL that you will use to interact with the node, including the GUI.
+## TLS_KEY_PATH
 
-## DATABASE_TIMEOUT
-- Default: "500ms"
+- Default: _none_
 
-If the database file is already in use, the Chainlink node will wait the specified value (with a given time unit) for the database to become available.
+Location of the TLS private key file. Example: `/home/$USER/.chainlink/tls/server.key`
 
-## DATABASE_URL
-- Default: _none_
+# Gas price tuning
 
-The PostgreSQL URI to connect to your database. See the [Running a Chainlink Node](../running-a-chainlink-node/#set-the-remote-database_url-config) for an example.
+Use this section to tune your node's gas pricing. In most cases, leaving these values at their defaults should give good results.
 
-## DEFAULT_HTTP_LIMIT
-- Default: "32768"
+## ETH_GAS_BUMP_PERCENT
 
-Prevents an endpoint from returning a payload larger than 32kb (the default) via the HttpGet and HttpPost core adapters.
+- Default: _automatic based on chain ID_
 
-## DEFAULT_HTTP_TIMEOUT
-- Default: "15s"
+The percentage by which to bump gas on a transaction that has exceeded `ETH_GAS_BUMP_THRESHOLD`. The larger of `ETH_GAS_BUMP_PERCENT` and `ETH_GAS_BUMP_WEI` is taken for gas bumps.
 
-Maximum time to wait for a response in the HTTP adapter.
+## ETH_GAS_BUMP_THRESHOLD
 
-## ENABLE_EXPERIMENTAL_ADAPTERS
-- Default: "false"
+- Default: _automatic based on chain ID_
 
-Setting this to true enables the use of experimental adapters. These are either not production-ready or require further decentralization to use.
+Chainlink can configured to automatically bump gas on transactions that have been stuck waiting in the mempool for at least this many blocks. Set to 0 to disable gas bumping completely.
 
-## ETH_CHAIN_ID
-- Default: "1"
+## ETH_GAS_BUMP_WEI
+
+- Default: _automatic based on chain ID_
+
+The minimum fixed amount of wei by which gas is bumped on each transaction attempt.
+
+## ETH_GAS_PRICE_DEFAULT
 
-Represents the chain ID to use for transactions. The Ethereum client must support the `eth_chainId` RPC method. Use the following command (with RPC calls enabled) to call your Ethereum client to ensure that it's supported. Geth and Parity's latest versions should support this call.
+- Default: _automatic based on chain ID_
+
+The default gas price to use when submitting transactions to the blockchain. Will be overridden by the in-built GasUpdater, and may be increased if gas bumping is enabled.
+
+Can be used with the `chainlink setgasprice` to be updated while the node is still running.
+
+## ETH_MAX_GAS_PRICE_WEI
+
+- Default: _automatic based on chain ID_
+
+Chainlink will never pay more than this for a transaction. 
+
+## ETH_MIN_GAS_PRICE_WEI
+
+- Default: _automatic based on chain ID_
+
+Chainlink will never pay less than this for a transaction.
+
+It is possible to force chainlink to use a fixed gas price by setting a combination of these, e.g.
 
 ```
-curl -k -X POST -H 'Content-Type: application/json' -d '{"jsonrpc":"2.0","method":"eth_chainId","id":1}' http://localhost:8545
+ETH_MAX_GAS_PRICE_WEI=100
+ETH_MIN_GAS_PRICE_WEI=100
+ETH_GAS_PRICE_DEFAULT=100
+ETH_GAS_BUMP_THRESHOLD=0
+GAS_UPDATER_ENABLED=false
 ```
 
-## ETH_GAS_BUMP_THRESHOLD
-- Default: "3"
+## GAS_UPDATER_ENABLED
 
-The number of blocks to wait if the transaction has still not been confirmed before resubmitting the transaction.
+- Default: _automatic based chain ID_
 
-## ETH_GAS_BUMP_WEI
-- Default: "5000000000"
+On by default for most chains. When enabled, dynamically adjusts default gas price based on heuristics from mined blocks.
 
-The amount of wei to increase for the resubmitted transaction.
+## GAS_UPDATER_TRANSACTION_PERCENTILE
 
-## ETH_GAS_BUMP_PERCENT
-- Default: "20"
+- Default: `"60"`
 
-The minimum percentage to bump gas. If this is larger than ETH_GAS_BUMP_WEI then this value will be chosen instead when bumping gas.
+Must be in range 0-100.
 
-## ETH_GAS_PRICE_DEFAULT
-- Default: "20000000000"
+Only has an effect if gas updater is enabled. Specifies percentile gas price to choose. E.g. if the block history contains four transactions with gas prices `[100, 200, 300, 400]` then picking 25 for this number will give a value of 200. If the calculated gas price is higher than `ETH_GAS_PRICE_DEFAULT` then the higher price will be used as the base price for new transactions.
 
-The default gas price to use when submitting transactions to the blockchain. Can be used with the `chainlink setgasprice` to be updated while the node is still running.
+Think of this number as an indicator of how aggressive you want your node to price its transactions.
 
-## ETH_MAX_GAS_PRICE_WEI
-- Default: "1500000000000"
+Setting this number higher will cause Chainlink to select higher gas prices.
 
-The absolute maximum price to pay for a transaction. Exceeding this will result in an errored job run. The default value is 1500 Gwei.
+Setting it lower will tend to set lower gas prices.
 
-## GAS_UPDATER_ENABLED
-- Default: "false"
+# Other env vars
 
-Turns on the automatic gas updater if set to true.
+## ADMIN_CREDENTIALS_FILE
 
-## GAS_UPDATER_BLOCK_DELAY
-- Default: "3"
+- Default: `$CHAINLINK_ROOT/apicredentials`
 
-Number of blocks that the gas updater trails behind head.
+ADMIN_CREDENTIALS_FILE optionally points to a text file containing admin credentials for logging in. It is useful for running client CLI commands and has no effect when passed to a running node.
 
-## GAS_UPDATER_BLOCK_HISTORY_SIZE
-- Default: "24"
+The file should contain two lines, the first line is the username and second line is the password.
+e.g.
+```
+myusername@example.com
+mysecurepassw0rd
+```
 
-Number of past blocks to keep in memory.
+## ALLOW_ORIGINS
 
-## GAS_UPDATER_TRANSACTION_PERCENTILE
-- Default: "60"
+- Default: `"http://localhost:3000,http://localhost:6688"`
 
-Percentile gas price to choose. E.g. if the block history contains four transactions with gas prices `[100, 200, 300, 400]` then picking 25 for this number will give a value of 200. If the calculated gas price is higher than `ETH_GAS_PRICE_DEFAULT` then the higher price will be used as the base price for new transactions. Node operators are encouraged to reach out to us before experimenting with these settings.
+Specifies the addresses/URLs of allowed connections to the API on `CLIENT_NODE_URL`. Input may be a comma-separated (no spaces) list. You may experience CORS issues if this is not set correctly.
 
-## ETH_URL
-- Default: "ws://localhost:8546"
+## CHAINLINK_PORT
 
-This is the websocket address of the Ethereum client that the Chainlink node will connect to. All interaction with the Ethereum blockchain will occur through this connection.
+- Default: `"6688"`
 
-## ETH_SECONDARY_URL
-- Default: _none_
+Port used for the [API Reference](../api-reference/) and GUI.
 
-If set, transactions will also be broadcast to this secondary ethereum node. This allows transaction broadcasting to be more robust in the face of primary ethereum node bugs or failures.
+
+## CLIENT_NODE_URL
+
+- Default: `"http://localhost:6688"`
+
+This is the URL that you will use to interact with the node, including the GUI. It only has effect when using the chainlink client to run CLI commands.
+
+## DATABASE_BACKUP_FREQUENCY
+
+- Default: `"0"`
+
+If set to a positive duration and DATABASE_BACKUP_MODE is not `none`, will dump the database at this regular interval.
+
+Example:
+
+`DATABASE_BACKUP_FREQUENCY=1h`
+
+## DATABASE_BACKUP_MODE
+
+- Default: `"none"`
+
+Set the mode for automatic database backups. Can be one of `none`, `lite`, `full`. If enabled, Chainlink will automatically dump database backups at regular intervals.
+
+`none` disables.
+`lite` dumps small, essential tables.
+`full` dumps the entire database.
+
+## DATABASE_BACKUP_URL
+
+If specified, the automatic database backup will pull from this URL rather than the main `DATABASE_URL`. It is recommended to set this value to a read replica if you have one to avoid excessive load on the main database.
+
+## ETH_DISABLED
+
+- Default: `"false"`
+
+Disable connection to eth node entirely. This can be useful in certain cases, e.g. to spin up a chainlink node and add jobs without having it execute anything.
 
 ## EXPLORER_URL
+
 - Default: _none_
 
 The Explorer websocket URL for the node to push stats to.
 
 ## EXPLORER_ACCESS_KEY
+
 - Default: _none_
 
 The access key for authenticating with the Explorer.
 
 ## EXPLORER_SECRET
+
 - Default: _none_
 
 The secret for authenticating with the Explorer.
 
-## FEATURE_FLUX_MONITOR
-- Default: "false"
-
-Flag whether or not to allow for the flux monitor jobs to be active.
-
 ## JSON_CONSOLE
-- Default: "false"
 
-Flag to print the console output in JSON or in human-friendly output.
+- Default: `"false"`
 
-## LINK_CONTRACT_ADDRESS
-- Default: "0x514910771AF9Ca656af840dff83E8264EcF986CA"
+Set to true to enable JSON logging. Otherwise will log in a human-friendly console format.
 
-The address of the LINK token contract. Used for displaying the node account's LINK balance.
+## LOG_LEVEL
 
-## LOG_LEVEL                      
-- Default: "info"
+- Default: `"info"`
 
 The `LOG_LEVEL` environment variable determines both what is printed on the screen and what is written to the logfile, located at `$ROOT/log.jsonl`.
 
@@ -188,42 +383,32 @@ The available options are:
 - "panic"
 
 ## LOG_SQL
-- Default: "false"
+
+- Default: `"false"`
 
 Tells Chainlink to log all SQL statements made using the default logger.
 
 ## LOG_SQL_MIGRATIONS
-- Default: "true"
+
+- Default: `"true"`
 
 Tells Chainlink to log all SQL migrations made using the default logger.
 
 ## LOG_TO_DISK
-- Default: "true"
-
-Enables or disables the node writing to the `$ROOT/log.jsonl` file.
-
-## MAXIMUM_SERVICE_DURATION
-- Default: "8760h"
-
-The maximum duration that a service agreement can be valid for. Default is one year.
 
-## MAX_RPC_CALLS_PER_SECOND
-- Default: "500"
+- Default: `"true"`
 
-Maximum numbers of JSON-SPEC calls per second.
+Enables or disables the node writing to the `$ROOT/log.jsonl` file.
 
 ## MIN_INCOMING_CONFIRMATIONS
-- Default: "3"
-
-The number of block confirmations to wait before beginning a task run.
 
-## MIN_OUTGOING_CONFIRMATIONS
-- Default: "12"
+- Default: `"3"`
 
-The number of block confirmations to wait after a task run has been ran to regard it as "completed" in the node.
+The number of block confirmations to wait before kicking off a job run. Setting this to a lower value improves node response time at the expense of occasionally submitting duplicate transactions in the event of chain re-orgs (duplicate transactions are harmless but cost some eth).
 
 ## MINIMUM_CONTRACT_PAYMENT
-- Default: "1000000000000000000"
+
+- Default: `"1000000000000000000"`
 
 For jobs that use the EthTx adapter, this is the minimum payment amount in order for the node to accept and process the job. Since there are no decimals on the EVM, the value is represented like wei. This makes the default value 1 LINK.
 [block:callout]
@@ -232,47 +417,40 @@ For jobs that use the EthTx adapter, this is the minimum payment amount in order
   "body": "Keep in mind, the Chainlink node currently responds with a 500,000 gas limit. Under pricing your node could mean it spends more in ETH (on gas) than it earns in LINK."
 }
 [/block]
-## MINIMUM_REQUEST_EXPIRATION
-- Default: "300"
-
-Service agreement encumbrance parameter for the request expiration time.
-
-## MINIMUM_SERVICE_DURATION
-- Default: "0s"
-
-The minimum duration that a service agreement can be valid for.
 
 ## OPERATOR_CONTRACT_ADDRESS
+
 - Default: _none_
 
 The address of the Operator contract. Used to filter the contract addresses the node should listen to for Run Logs.
 
-## REAPER_EXPIRATION
-- Default: "240h"
+## ORM_MAX_IDLE_CONNS
 
-Cleans up stale sessions in the node.
+- Default: `"10"`
+
+Maximum number of idle database connections to keep open by the ORM. Reducing this can help if you are hitting postgres connection limits, at the expense of poorer chainlink node performance.
+
+## ORM_MAX_OPEN_CONNS
+
+- Default: `"20"`
+
+Maximum number of open database connections from the ORM. Reducing this can help if you are hitting postgres connection limits, at the expense of poorer chainlink node performance.
 
 ## ROOT
-- Default: "~/.chainlink"
+
+- Default: `"~/.chainlink"`
 
 This is the directory where the `log.jsonl` file resides. `log.jsonl` is the log as written by the Chainlink node, depending on the `LOG_LEVEL` specified by the environment variable's value.
 
 ## SECURE_COOKIES
-- Default: "true"
+
+- Default: `"true"`
 
 Requires the use of secure cookies for authentication. Set to false to enable standard http requests along with `CHAINLINK_TLS_PORT=0`.
 
 ## SESSION_TIMEOUT
-- Default: "15m"
-
-This value determines the amount of idle time to elapse before the GUI signs out users from their sessions.
-
-## TLS_CERT_PATH
-- Default: _none_
 
-Location of the TLS certificate file. Example: `/home/$USER/.chainlink/tls/server.crt`
+- Default: `"15m"`
 
-## TLS_KEY_PATH
-- Default: _none_
+This value determines the amount of idle time to elapse before the GUI signs out users from their sessions.
 
-Location of the TLS private key file. Example: `/home/$USER/.chainlink/tls/server.key`
\ No newline at end of file