I’ve been running Solr for a dozen years and I’ve never needed a heap larger than 8 GB. >> What is your data size? same like us 1 TB? is your searching or indexing >> frequently? NRT model?
My question is why replica is going into recovery? When replica went down, I checked GC log but GC pause was not more than 2 seconds. Also, I cannot find out any reason for recovery from Solr log file. i want to know the reason why replica goes into recovery. Regards, Vishal Patel ________________________________ From: Walter Underwood <wun...@wunderwood.org> Sent: Friday, July 10, 2020 3:03 AM To: solr-user@lucene.apache.org <solr-user@lucene.apache.org> Subject: Re: Replica goes into recovery mode in Solr 6.1.0 Those are extremely large JVMs. Unless you have proven that you MUST have 55 GB of heap, use a smaller heap. I’ve been running Solr for a dozen years and I’ve never needed a heap larger than 8 GB. Also, there is usually no need to use one JVM per replica. Your configuration is using 110 GB (two JVMs) just for Java where I would configure it with a single 8 GB JVM. That would free up 100 GB for file caches. wunder Walter Underwood wun...@wunderwood.org http://observer.wunderwood.org/ (my blog) > On Jul 8, 2020, at 10:10 PM, vishal patel <vishalpatel200...@outlook.com> > wrote: > > Thanks for reply. > > what you mean by "Shard1 Allocated memory” >>> It means JVM memory of one solr node or instance. > > How many Solr JVMs are you running? >>> In one server 2 solr JVMs in which one is shard and other is replica. > > What is the heap size for your JVMs? >>> 55GB of one Solr JVM. > > Regards, > Vishal Patel > > Sent from Outlook<http://aka.ms/weboutlook> > ________________________________ > From: Walter Underwood <wun...@wunderwood.org> > Sent: Wednesday, July 8, 2020 8:45 PM > To: solr-user@lucene.apache.org <solr-user@lucene.apache.org> > Subject: Re: Replica goes into recovery mode in Solr 6.1.0 > > I don’t understand what you mean by "Shard1 Allocated memory”. I don’t know of > any way to dedicate system RAM to an application object like a replica. > > How many Solr JVMs are you running? > > What is the heap size for your JVMs? > > Setting soft commit max time to 100 ms does not magically make Solr super > fast. > It makes Solr do too much work, makes the work queues fill up, and makes it > fail. > > wunder > Walter Underwood > wun...@wunderwood.org > http://observer.wunderwood.org/ (my blog) > >> On Jul 7, 2020, at 10:55 PM, vishal patel <vishalpatel200...@outlook.com> >> wrote: >> >> Thanks for your reply. >> >> One server has total 320GB ram. In this 2 solr node one is shard1 and second >> is shard2 replica. Each solr node have 55GB memory allocated. shard1 has >> 585GB data and shard2 replica has 492GB data. means almost 1TB data in this >> server. server has also other applications and for that 60GB memory >> allocated. So total 150GB memory is left. >> >> Proper formatting details: >> https://drive.google.com/file/d/1K9JyvJ50Vele9pPJCiMwm25wV4A6x4eD/view >> >> Are you running multiple huge JVMs? >>>> Not huge but 60GB memory allocated for our 11 application. 150GB memory >>>> are still free. >> >> The servers will be doing a LOT of disk IO, so look at the read and write >> iops. I expect that the solr processes are blocked on disk reads almost all >> the time. >>>> is it chance to go in recovery mode if more IO read and write or blocked? >> >> "-Dsolr.autoSoftCommit.maxTime=100” is way too short (100 ms). >>>> Our requirement is NRT so we keep the less time >> >> Regards, >> Vishal Patel >> ________________________________ >> From: Walter Underwood <wun...@wunderwood.org> >> Sent: Tuesday, July 7, 2020 8:15 PM >> To: solr-user@lucene.apache.org <solr-user@lucene.apache.org> >> Subject: Re: Replica goes into recovery mode in Solr 6.1.0 >> >> This isn’t a support list, so nobody looks at issues. We do try to help. >> >> It looks like you have 1 TB of index on a system with 320 GB of RAM. >> I don’t know what "Shard1 Allocated memory” is, but maybe half of >> that RAM is used by JVMs or some other process, I guess. Are you >> running multiple huge JVMs? >> >> The servers will be doing a LOT of disk IO, so look at the read and >> write iops. I expect that the solr processes are blocked on disk reads >> almost all the time. >> >> "-Dsolr.autoSoftCommit.maxTime=100” is way too short (100 ms). >> That is probably causing your outages. >> >> wunder >> Walter Underwood >> wun...@wunderwood.org >> http://observer.wunderwood.org/ (my blog) >> >>> On Jul 7, 2020, at 5:18 AM, vishal patel <vishalpatel200...@outlook.com> >>> wrote: >>> >>> Any one is looking my issue? Please guide me. >>> >>> Regards, >>> Vishal Patel >>> >>> >>> ________________________________ >>> From: vishal patel <vishalpatel200...@outlook.com> >>> Sent: Monday, July 6, 2020 7:11 PM >>> To: solr-user@lucene.apache.org <solr-user@lucene.apache.org> >>> Subject: Replica goes into recovery mode in Solr 6.1.0 >>> >>> I am using Solr version 6.1.0, Java 8 version and G1GC on production. We >>> have 2 shards and each shard has 1 replica. We have 3 collection. >>> We do not use any cache and also disable in Solr config.xml. Search and >>> Update requests are coming frequently in our live platform. >>> >>> *Our commit configuration in solr.config are below >>> <autoCommit> >>> <maxTime>600000</maxTime> >>> <maxDocs>20000</maxDocs> >>> <openSearcher>false</openSearcher> >>> </autoCommit> >>> <autoSoftCommit> >>> <maxTime>${solr.autoSoftCommit.maxTime:-1}</maxTime> >>> </autoSoftCommit> >>> >>> *We used Near Real Time Searching So we did below configuration in >>> solr.in.cmd >>> set SOLR_OPTS=%SOLR_OPTS% -Dsolr.autoSoftCommit.maxTime=100 >>> >>> *Our collections details are below: >>> >>> Collection Shard1 Shard1 Replica Shard2 Shard2 Replica >>> Number of Documents Size(GB) Number of Documents Size(GB) >>> Number of Documents Size(GB) Number of Documents Size(GB) >>> collection1 26913364 201 26913379 202 26913380 >>> 198 26913379 198 >>> collection2 13934360 310 13934367 310 13934368 >>> 219 13934367 219 >>> collection3 351539689 73.5 351540040 73.5 351540136 >>> 75.2 351539722 75.2 >>> >>> *My server configurations are below: >>> >>> Server1 Server2 >>> CPU Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz, 2301 Mhz, 10 Core(s), 20 >>> Logical Processor(s) Intel(R) Xeon(R) CPU E5-2650 v3 @ 2.30GHz, 2301 >>> Mhz, 10 Core(s), 20 Logical Processor(s) >>> HardDisk(GB) 3845 ( 3.84 TB) 3485 GB (3.48 TB) >>> Total memory(GB) 320 320 >>> Shard1 Allocated memory(GB) 55 >>> Shard2 Replica Allocated memory(GB) 55 >>> Shard2 Allocated memory(GB) 55 >>> Shard1 Replica Allocated memory(GB) 55 >>> Other Applications Allocated Memory(GB) 60 22 >>> Other Number Of Applications 11 7 >>> >>> >>> Sometimes, any one replica goes into recovery mode. Why replica goes into >>> recovery? Due to heavy search OR heavy update/insert OR long GC pause time? >>> If any one of them then what should we do in configuration? >>> Should we increase the shard for recovery issue? >>> >>> Regards, >>> Vishal Patel >>> >> >
