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  1. MariaDB Server
  2. MDEV-26784

[Warning] InnoDB: Difficult to find free blocks in the buffer pool

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      Description

      The mariabackup --prepare shows this warning:

      2021-10-07  1:13:23 0 [Note] InnoDB: Starting a batch to recover 9962 pages from redo log.
      2021-10-07  1:13:28 0 [Warning] InnoDB: Difficult to find free blocks in the buffer pool (21 search iterations)! 21 failed attempts to flush a page! Consider increasing innodb_buffer_pool_size. Pending flushes (fsync) log: 0; buffer pool: 0. 582296 OS file reads, 504266 OS file writes, 2396 OS fsyncs.
      

      The error is similar to:
      https://jira.mariadb.org/browse/MDEV-20679
      https://jira.mariadb.org/browse/MDEV-19176

      But looks like they are already fixed in 10.5.1

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              Assignee:
              thiru Thirunarayanan Balathandayuthapani
              Reporter:
              niljoshi Nilnandan Joshi
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