Re: MDB_PAGE_FULL

Pieter Martin wrote:

Hi,

I am using lmdb to implement a graph db via java JNI. Initial results are amazing.

Anyhow I am having trouble with deletions.

I am getting MDB_PAGE_FULL when trying to delete.

Sounds like ITS#7756, you should try with git rev b77689f97572980d5de729e2fe6d8a5e6e9d6218

A simplified version of the code is as follows.

  //set the key
  ...

  while ((rc = mdb_cursor_get(vertexCursor, &key, &data,

MDB_SET_RANGE)) == 0) {

              rc = mdb_cursor_del(vertexCursor, 0);
              if (rc != 0) {
                  printf("removeVertex 4 %i\n", rc);
                  goto fail;
              }

              //set the key
              ...
  }

The mdb_cursor_del returns a error code -30786 (MDB_PAGE_FULL) on about the 38th loop.

if there are very few entries then the exception does not happen. Is there something obvious that I am doing wrong to cause a MDB_PAGE_FULL exception?

Thanks Pieter