On 26/05/2019 19:08, Shawn Heisey wrote:
On 5/25/2019 9:40 AM, Joe Doupnik wrote:
Comparing memory consumption (real, not virtual) of quiesent
Solr v8.0 and prior with Solr v8.1.0 reveals the older versions use
about 1.6GB on my systems but v8.1.0 uses 4.5 to 5+GB. Systems used
are SUSE Linux, with Oracle JDK v1.8 and openjdk v10. This is a major
memory consumption issue. I have seen no mention of it in the docs
nor forums.
If Solr is using 4 to 5 GB of memory on your system, it is only doing
that because you told it that it was allowed to.
If you run a Java program with a minimum heap that's smaller than the
max heap, which Solr does not do by default, then what you will find
is that Java *might* stay lower than the maximum for a while. But
eventually it WILL allocate the entire maximum heap from the OS, plus
some extra for Java itself to work with. Solr 8.0 and Solr 8.1 are
not different from each other in this regard.
Thanks,
Shawn
--------
Not to be argumentative, prior to Solr v8.1 quiesent resident
memory remained at about the 1.6GB level, and during active indexing it
could exceed 3.5GB. With the same configuration settings Solr v8.1
changes that to use _a lot_ more memory. Thus something significant has
changed with Solr v8.1 when compared to its predecessors. The question
is what, and what can we do about it.
I am not about to enter a guessing game with Solr and Java and its
heap usage. That is far to complex to hope to win.
Thus, something changed, for the worse here in the field, and I do
not know what.
Thanks,
Joe D.
