xz выжрал всю память и был расстрелян за это

The  memory  usage of xz varies from a few hundred kilobytes to several gigabytes depending on the compression set‐
       tings.  The settings used when compressing a file determine the memory requirements of the decompressor.  Typically
       the  decompressor needs 5 % to 20 % of the amount of memory that the compressor needed when creating the file.  For
       example, decompressing a file created with xz -9 currently requires 65 MiB of memory.  Still,  it  is  possible  to
       have .xz files that require several gigabytes of memory to decompress.

       Especially  users of older systems may find the possibility of very large memory usage annoying.  To prevent uncom‐
       fortable surprises, xz has a built-in memory usage limiter, which is disabled by  default.   While  some  operating
       systems  provide  ways  to  limit  the memory usage of processes, relying on it wasn't deemed to be flexible enough
       (e.g. using ulimit(1) to limit virtual memory tends to cripple mmap(2)).

       The memory usage limiter can be enabled with the command line option --memlimit=limit.

 The settings used when compressing a file determine the memory requirements of the decompressor