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  1. MariaDB Server
  2. MDEV-17566

Reduce SP memory usage

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      This contributed patch came from Jerome Brauge. Please find the patch attached.

      As stored procedures seems to be very memory aggressive, I found two possible optimizations to avoid having three strings containing the stored procedure code in memory.

      Probably, same optimizations may be applied to packages.
      I haven’t add any tests because I think everything is covered by the existing tests.

      What do you think about ?

      In a second time, I think working on SP cache.

      Currently it’ s a simple hash table and all the hash table is flushed as soon as the threshold (stored_program_cache) is reached.

      It's not very good.

      We could :

      • Use a more intelligent cache (LFU ?)
      • Add some performance counters

      Regards.

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              Assignee:
              bar Alexander Barkov
              Reporter:
              bar Alexander Barkov
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