dovecot: add tmpfs_index chatmail.ini parameter for storing index files in /dev/shm#757
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dovecot: add tmpfs_index chatmail.ini parameter for storing index files in /dev/shm#757
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Maybe we can just use https://linuxvox.com/blog/devshm-in-linux/ instead of shipping our own tmpfs. |
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hpk42
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dovecot allows to set a separate index directory: https://doc.dovecot.org/2.3/configuration_manual/mail_location/#index-files which is preferable to creating symlinks
how is dovecot handling it when the (tmp) file system gets full?
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j4n
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| # but it's not clear how to disable them completely. | ||
| # According to https://doc.dovecot.org/2.3/settings/advanced/#core_setting-mail_cache_max_size | ||
| # if the cache file becomes larger than the specified size, it is truncated by dovecot | ||
| mail_cache_max_size = 500K |
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removing this limit will lead to no limit when we dont use the tmpfs option I presume?
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This is a good question, along with the usual combined size of the caches on a large server. |
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| self.remove_file(f"{mbox.basedir}/maildirsize") | ||
| for file in mbox.extrafiles: | ||
| if "dovecot.index" in file.path.split("/")[-1] and file.size > 500 * 1024: | ||
| self.remove_file(file.path) |
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This matches broadly and according to my brief research triggers a full index rebuild where the old max_size flag just pruned the cache, I wonder if this won't mean a lot of I/O churn.
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| # Certificate renewal is your responsibility; changed files are | ||
| # picked up automatically by all relay services. | ||
| # tls_external_cert_and_key = /path/to/fullchain.pem /path/to/privkey.pem | ||
| # store index files in tmpfs (good for disk size and I/O, bad for ram) |
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This should be more informative I think. What are the performance implications / motivations to enable this? How big should your ram / tmpfs wrt. to number of chatmail accounts?
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fix #644