Todd Gamblin be6d7db2a8 performance: add read transactions for install_all() and install() ... Environments need to read the DB a lot when installing all specs. - [x] Put a read transaction around `install_all()` and `install()` to avoid repeated locking		2019-12-23 23:18:45 -08:00
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spack	performance: add read transactions for install_all() and install()	2019-12-23 23:18:45 -08:00