I have moved the posts by @SpinCharm into a separate topic here Excessive Plex Media Server process memory use as the reported problem appears to be different from the other reports here
Is there still a problem on the latest release of Plex Media Server ? version 1.21.2.3943-a91458577 ?
I would need evidence of the issue causing failures eg hitting OOM crash on reaching 2Gb or 4Gb or higher and with the LogMemoryUse preference set (see Advanced, Hidden Server Settings | Plex Support )
Suggest also increasing the number of logfiles - see preference LogNumFiles on the same linked support page - suggest setting it to 15
