Site Announcements – BitMEX Blog https://blog.bitmex.com The official blog of BitMEX, the Bitcoin Mercantile Exchange. Wed, 07 Feb 2018 13:36:24 +0000 en-US hourly 1 https://wordpress.org/?v=4.9.4 https://blog.bitmex.com/wp-content/uploads/2015/03/favicon-128x128.png Site Announcements – BitMEX Blog https://blog.bitmex.com 32 32 78374597 Development Notes: Feb 2, 2018 https://blog.bitmex.com/site_announcement/development-notes-feb-2-2018/ Sat, 03 Feb 2018 00:51:00 +0000 https://blog.bitmex.com/?post_type=site_announcement&p=8549 About 13:00 UTC today, the BitMEX platform sustained a record amount of traffic, both in orders and in number of realtime subscriptions. This traffic caused our proxies’ network traffic to be throttled on our cloud host, which caused data streams to back up. Those data streams eventually backed up enough that they caused a cascade of website users to request new data images, which was a volume of traffic large enough to render the site unusable.

We recovered the platform by temporarily disabling trading, reprovisioning the effected services, and restarting trading. Performance remained sluggish for a few hours afterward, but we have successfully scaled one of the two main systems responsible for the slowdown. Our readings show socket latency well below the 24hr average at the time of writing.

The second system will be migrated shortly and will mitigate this problem going forward. We are still experiencing slowdowns on the engine layer that will result in the dreaded “Overload” messages for many users despite the above scaling. We are very aware of the issue and have a team dedicated to solving this problem as quickly as possible. The solution in progress involves rearchitecting certain systems integral to BitMEX operation, so extensive planning and testing is in progress. We will update you once this work is complete.

In other news, a number of major updates to the frontend have hit, including a new popout chat box. Some users may have stuck caches on the chart due to an upgrade. If you are seeing this, please full-screen the chart, then close the fullscreen window. If that doesn’t work, please clear your browser cache.

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Bitcoin Cash Sale Summary https://blog.bitmex.com/site_announcement/bitcoin-cash-sale-summary/ Sat, 30 Dec 2017 10:32:13 +0000 https://blog.bitmex.com/?post_type=site_announcement&p=7458 BitMEX completed the sale of all Bitcoin Cash (BCH) held on behalf of our users. Bitcoin Cash sale details:

  • The amount of Bitcoin Cash a user is entitled to is determined by their margin balance at 1 August 2017 13:17 UTC, a few seconds after block 478,588.
  • Bitcoin Cash to Bitcoin (XBT) ratio is 1 BCH to 0.1707 XBT.
  • Users’ BitMEX Bitcoin wallets will be credited with the amount of Bitcoin they are entitled to.

Note: A number of users received an email with an incorrect value in the subject line. The body of the email contains the correct credit. You can verify your credit at https://www.bitmex.com/app/wallet, where this transaction will be listed as a Transfer.

The Insurance Fund was credited with 120.5321631 XBT due to its holdings of Bitcoin Cash.

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XTZZ17 Settlement Details https://blog.bitmex.com/site_announcement/xtzz17-settlement-details/ Thu, 28 Dec 2017 05:31:02 +0000 https://blog.bitmex.com/?post_type=site_announcement&p=7398 Tezzies currently are not tradable on Bittrex, Kraken, or Poloniex. Therefore, as specified by the Tezos Series Guide, the BitMEX Tezos/Bitcoin 29 December 2017 futures contract, XTZZ17, will settle at the ICO price of 0.0002 XBT.

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BitMEX Product List Update https://blog.bitmex.com/site_announcement/bitmex-product-list-update/ Wed, 13 Dec 2017 08:53:47 +0000 https://blog.bitmex.com/?post_type=site_announcement&p=7139 Quarterly Bitcoin / USD Futures Contracts

The following quarterly contracts will be listed on or before 15 December 2017 12:00 UTC:

  • BitMEX Bitcoin / USD 30 March 2018 futures contract, XBTH18

We will add the BitMEX Bitcoin / USD 29 June 2018 futures contract, XBTM18, in the near future.

Quarterly Bitcoin / JPY Futures Contracts

No new Bitcoin / JPY quarterly contract will be listed after the BitMEX Bitcoin / JPY 29 December 2017 futures contract, XBJZ17, expires. We will add a Bitcoin / JPY perpetual swap in the near future.

Quarterly Altcoin Futures Contracts

The following quarterly contracts will be listed on or before 15 December 2017 12:00 UTC:

  • BitMEX Ether / Bitcoin 30 March 2018 futures contract, ETHH18
  • BitMEX Dash / Bitcoin 30 March 2018 futures contract, DASHH18
  • BitMEX Litecoin / Bitcoin 30 March 2018 futures contract, LTCH18
  • BitMEX Monero / Bitcoin 30 March 2018 futures contract, XMRH18
  • BitMEX Ripple / Bitcoin 30 March 2018 futures contract, XRPH18
  • BitMEX Zcash / Bitcoin 30 March 2018 futures contract, ZECH18

Please note the fee structure for all altcoin futures contracts will change to maker / taker, -0.05% / +0.25%.

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Order Placement Limits https://blog.bitmex.com/site_announcement/order-placement-limits/ Sat, 09 Dec 2017 14:22:44 +0000 https://blog.bitmex.com/?post_type=site_announcement&p=7005 Starting December 11th, 2017 at 12:00 UTC, the following limits will be applied:

(1) Maximum 200 open orders per contract per account;
(2) Maximum 10 stop orders per contract per account;
(3) Maximum 10 contingent orders per contract per account.

When placing a new order that causes these caps to be exceeded, it will be rejected with the message “Too many [open|stop|contingent] orders”.

These caps are designed to improve the overall trading experience on BitMEX and will be reviewed and updated periodically.

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Update to System Overload Policy https://blog.bitmex.com/site_announcement/update-to-system-overload-policy/ Sun, 03 Dec 2017 23:17:50 +0000 https://blog.bitmex.com/?post_type=site_announcement&p=6958 BitMEX is experiencing record-breaking load at this time due to recent Bitcoin price movements. Our engine team is working full-time to improve performance, delivering a 20% performance improvement on Friday and with more to come. Above all, BitMEX is committed to correctness in its trading engine and to real-time correctness auditing. BitMEX positions and orders are always internally consistent from open to close.

Unfortunately, when load spikes, we cannot service every incoming request while maintaining acceptable response times. In early November, we implemented a cap on the maximum number of requests that can enter the engine queue, after which new requests are rejected until the queue has shrunk. Many of you have experienced this as the “System Overload” message (also known as “Load Shedding”).

For the benefit of our traders, the following request types are no longer subject to rejection during overload:

  • Adding/removing margin from a position or adjusting leverage.
  • Canceling an order.
  • Market or Limit Close of a position, when using the Close buttons on the Position table.
    • For API users, this corresponds to use of the “Close” execInst.
    • This lifted restriction only applies to non-bulk orders. Close orders, even inside bulk payloads, may be load-shed.

New orders and order amends are still subject to rejection on overload. We will keep you updated as we improve the situation.

 

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Completed Maintenance: November 30, 3:30 UTC https://blog.bitmex.com/site_announcement/pending-maintenance-thursday-november-30-330-utc/ Thu, 30 Nov 2017 02:48:37 +0000 https://blog.bitmex.com/?post_type=site_announcement&p=6930 Maintenance is complete.

We have successfully tested a new hardware configuration for our trading engine. We will be taking down the engine at 3:30 UTC (in one hour) for about 15 minutes to do the switchover. After completion, we will tweet and initiate a 3-minute cancel-only period.

Orders left open over maintenance will remain open, as will positions. If this concerns you, please cancel your orders and/or close your positions before the maintenance interval.

Any trigger orders (such as stops) will *not* activate during this period. Once trading restarts, if the price at that time would trigger your order, it will trigger then.

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Bitcoin Cash Futures Now Live https://blog.bitmex.com/site_announcement/bitcoin-cash-futures-now-live/ Wed, 15 Nov 2017 07:42:31 +0000 https://blog.bitmex.com/?post_type=site_announcement&p=6548 We are pleased to announce that the BitMEX 24 November 2017 Bitcoin Cash / Bitcoin futures contract is now live.​

  • Symbol: BCHX17
  • Expiry Date: 24 November 2017 12:00 UTC
  • Contract Value: 1 BCH
  • Underlying: Poloniex Bitcoin Cash / Bitcoin exchange rate
  • Leverage: 20x

​BitMEX Bitcoin Cash Holdings

On or before 31 December 2017:​

  • The amount of Bitcoin Cash a user is entitled to is determined by their Margin Balance at 1 August 2017 13:17 UTC, a few seconds after block 478,588.
  • Users will not receive Bitcoin Cash, rather BitMEX will sell all users’ Bitcoin Cash, and credit their wallet with the Bitcoin proceeds.

BitMEX Future Hard Fork Policy

BitMEX does not agree with contentious hard forks, and does not accept the manner in which Bitcoin Cash was forked, or the lack of preparation or notice before the fork; we consider this a dangerous action that imposes unacceptable costs on end-users and businesses. Please read our Policy on Bitcoin Hard Forks for acceptable hard-fork criteria.

However, months after the fork, it is clear this coin still has value and popular demand, so we have decided to credit Bitcoin at the prevailing Bitcoin Cash price. Do not expect future coins to be credited in this way. BitMEX reserves the right to credit forks or not – in the presence of doubt, always withdraw first.

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Summary of Completed Maintenance https://blog.bitmex.com/site_announcement/summary-of-completed-maintenance/ Fri, 10 Nov 2017 22:53:42 +0000 https://blog.bitmex.com/?post_type=site_announcement&p=6368 Maintenance yesterday, November 9th, went off without a hitch. This update was to increase trading capacity and improve behavior under high load. A list of changes:

  • Our trading engine was upgraded to a more modern server with faster, newer CPUs. This has improved overall latency and queue depth.
  • Load-shedding has been implemented. If the trading engine’s queue depth grows beyond an internal threshold, new requests will be immediately refused with a 503 until the queue shrinks again. Order cancellations are not subject to this restriction.
  • We have quadrupled capacity on the subsystem responsible for user authorization and API keys. This is a future-proofing measure and is unlikely to be noticed by users.
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Scheduled Maintenance: November 9, 2017 https://blog.bitmex.com/site_announcement/scheduled-maintenance-november-9-2017/ Sat, 04 Nov 2017 23:14:36 +0000 https://blog.bitmex.com/?post_type=site_announcement&p=6339 The BitMEX platform will halt trading on November 9 at 18:00 UTC for a database upgrade. Once the platform is back online, we will notify via Twitter, enter a cancel-only period for 5 minutes, and trading will resume.

Upon resumption of trading, the tick size on XBT products will be increased from 0.1 to 0.5 USD, and on XBJ products from 1 to 100 JPY. If you are using automated tools, please ensure they are aware of the change and submitting/amending with the proper tick size.

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