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  1. Core Server
  2. SERVER-22078

Remove term list limits for text index in FCV 4.2

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Details

    • Task
    • Status: Closed
    • Major - P3
    • Resolution: Done
    • 3.0.1, 3.1.0
    • 4.1.2
    • MMAPv1, Text Search
    • None
    • Fully Compatible
    • Storage NYC 2018-08-13, Storage NYC 2018-08-27

    Description

      SERVER-8431 restricted inserting a document into a collection with a text index under the following circumstances:

      • The number of unique terms in the fields indexed by the text index is greater than 400,000.
      • The total size of those terms is greater than 4MB.

      This was done to avoid causing the server to shut down from generating a group commit larger than 512MB. However, we have since increased the journaling capacity limit to 2000MB as part of SERVER-17501. We should considering raising these limits to allows users to store more text data in a single document.


      Steps to reproduce

      db.foo.drop();
      db.foo.createIndex({a: 'text'});
       
      var termLength = 16;
       
      var str = '';
      for (var i = 0; i < (5 * 1024 * 1024 / termLength); i++) {
          if (i > 0) {
              str += ' ';
          }
          str += i.zeroPad(termLength);
      }
       
      assert.writeOK(db.foo.insert({a: str}));
      

      assert: write failed with error: {
          "nInserted" : 0,
          "writeError" : {
              "code" : 16733,
              "errmsg" : "trying to index text where term list is too big, max is 4mb _id: ObjectId('568d68d5dd2e24af1002e247')"
          }
      }
      _getErrorWithCode@src/mongo/shell/utils.js:23:13
      doassert@src/mongo/shell/assert.js:13:14
      assert.writeOK@src/mongo/shell/assert.js:414:9
      

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              xiangyu.yao@mongodb.com Xiangyu Yao (Inactive)
              max.hirschhorn@mongodb.com Max Hirschhorn
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              Dates

                Created:
                Updated:
                Resolved: