Please help me. High CPU, but only 25 users on system
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Hi everyone
https://forum.orleu-edu.kz/ - course listeners community. Our community loads very slow and when active users increase up to 20-30 it shows blue 500 error screen. Please help me
CPU : 24 for, Memory: 100 GB, ubuntu + apache 2.4
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Unfortunately, it's impossible to tell just with that information. It could either be a plugin you've installed that is causing the load, or an external source.
To rule out plugins, disable all you have for.a day and see how your site performs.
To rule rule out external sources, install google analytics for a day and seeing if you are getting bombarded by a certain sourceThis is assuming you haven't had custom work done, outside of adding plugins.
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@The-SkyFoxx I wrote my topic after checking of my analitic values using google analytics and disable all plugins. Is it may be cause of not scalling system (https://docs.nodebb.org/configuring/scaling/. ) or wrong settings in our server machine?
P.S.In our community more than 9000 categories and groups. We divided our course listeners into small groups by special access into categories. -
@Nuran-Akimbek Dunno if related: https://community.nodebb.org/topic/17889/nodebb-3.7.1
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@baris How I can scale using apache. May I use this topic? https://ubiq.co/tech-blog/apache-load-balancer-configuration/
nodebb> db.objects.stats()
{
ok: 1,
capped: false,
wiredTiger: {
metadata: { formatVersion: 1 },
creationString: 'access_pattern_hint=none,allocation_size=4KB,app_metadata=(formatVersion=1),assert=(commit_timestamp=none,durable_timestamp=none,read_timestamp=none,write_timestamp=off),block_allocation=best,block_compressor=snappy,cache_resident=false,checksum=on,colgroups=,collator=,columns=,dictionary=0,encryption=(keyid=,name=),exclusive=false,extractor=,format=btree,huffman_key=,huffman_value=,ignore_in_memory_cache_size=false,immutable=false,import=(compare_timestamp=oldest_timestamp,enabled=false,file_metadata=,metadata_file=,repair=false),internal_item_max=0,internal_key_max=0,internal_key_truncate=true,internal_page_max=4KB,key_format=q,key_gap=10,leaf_item_max=0,leaf_key_max=0,leaf_page_max=32KB,leaf_value_max=64MB,log=(enabled=true),lsm=(auto_throttle=true,bloom=true,bloom_bit_count=16,bloom_config=,bloom_hash_count=8,bloom_oldest=false,chunk_count_limit=0,chunk_max=5GB,chunk_size=10MB,merge_custom=(prefix=,start_generation=0,suffix=),merge_max=15,merge_min=0),memory_page_image_max=0,memory_page_max=10m,os_cache_dirty_max=0,os_cache_max=0,prefix_compression=false,prefix_compression_min=4,readonly=false,source=,split_deepen_min_child=0,split_deepen_per_child=0,split_pct=90,tiered_object=false,tiered_storage=(auth_token=,bucket=,bucket_prefix=,cache_directory=,local_retention=300,name=,object_target_size=0),type=file,value_format=u,verbose=[],write_timestamp_usage=none',
type: 'file',
uri: 'statistics:table:collection-0--7973875821968606351',
LSM: {
'bloom filter false positives': 0,
'bloom filter hits': 0,
'bloom filter misses': 0,
'bloom filter pages evicted from cache': 0,
'bloom filter pages read into cache': 0,
'bloom filters in the LSM tree': 0,
'chunks in the LSM tree': 0,
'highest merge generation in the LSM tree': 0,
'queries that could have benefited from a Bloom filter that did not exist': 0,
'sleep for LSM checkpoint throttle': 0,
'sleep for LSM merge throttle': 0,
'total size of bloom filters': 0
},
autocommit: {
'retries for readonly operations': 0,
'retries for update operations': 0
},
'block-manager': {
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'blocks allocated': 147425,
'blocks freed': 138561,
'checkpoint size': 218357760,
'file allocation unit size': 4096,
'file bytes available for reuse': 16388096,
'file magic number': 120897,
'file major version number': 1,
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},
btree: {
'btree checkpoint generation': 2892,
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},
cache: {
'bytes currently in the cache': 802906757,
'bytes dirty in the cache cumulative': Long("17782286821"),
'bytes read into cache': 691436928,
'bytes written from cache': Long("11381690458"),
'checkpoint blocked page eviction': 0,
'checkpoint of history store file blocked non-history store page eviction': 0,
'data source pages selected for eviction unable to be evicted': 0,
'eviction gave up due to detecting an out of order on disk value behind the last update on the chain': 0,
'eviction gave up due to detecting an out of order tombstone ahead of the selected on disk update': 0,
'eviction gave up due to detecting an out of order tombstone ahead of the selected on disk update after validating the update chain': 0,
'eviction gave up due to detecting out of order timestamps on the update chain after the selected on disk update': 0,
'eviction gave up due to needing to remove a record from the history store but checkpoint is running': 0,
'eviction walk passes of a file': 0,
'eviction walk target pages histogram - 0-9': 0,
'eviction walk target pages histogram - 10-31': 0,
'eviction walk target pages histogram - 128 and higher': 0,
'eviction walk target pages histogram - 32-63': 0,
'eviction walk target pages histogram - 64-128': 0,
'eviction walk target pages reduced due to history store cache pressure': 0,
'eviction walks abandoned': 0,
'eviction walks gave up because they restarted their walk twice': 0,
'eviction walks gave up because they saw too many pages and found no candidates': 0,
'eviction walks gave up because they saw too many pages and found too few candidates': 0,
'eviction walks reached end of tree': 0,
'eviction walks restarted': 0,
'eviction walks started from root of tree': 0,
'eviction walks started from saved location in tree': 0,
'hazard pointer blocked page eviction': 0,
'history store table insert calls': 0,
'history store table insert calls that returned restart': 0,
'history store table out-of-order resolved updates that lose their durable timestamp': 0,
'history store table out-of-order updates that were fixed up by reinserting with the fixed timestamp': 0,
'history store table reads': 0,
'history store table reads missed': 0,
'history store table reads requiring squashed modifies': 0,
'history store table truncation by rollback to stable to remove an unstable update': 0,
'history store table truncation by rollback to stable to remove an update': 0,
'history store table truncation to remove an update': 0,
'history store table truncation to remove range of updates due to key being removed from the data page during reconciliation': 0,
'history store table truncation to remove range of updates due to out-of-order timestamp update on data page': 0,
'history store table writes requiring squashed modifies': 0,
'in-memory page passed criteria to be split': 2,
'in-memory page splits': 1,
'internal pages evicted': 0,
'internal pages split during eviction': 0,
'leaf pages split during eviction': 0,
'modified pages evicted': 3,
'overflow pages read into cache': 0,
'page split during eviction deepened the tree': 0,
'page written requiring history store records': 0,
'pages read into cache': 11256,
'pages read into cache after truncate': 0,
'pages read into cache after truncate in prepare state': 0,
'pages requested from the cache': 206807267,
'pages seen by eviction walk': 0,
'pages written from cache': 141673,
'pages written requiring in-memory restoration': 2,
'the number of times full update inserted to history store': 0,
'the number of times reverse modify inserted to history store': 0,
'tracked dirty bytes in the cache': 8990145,
'unmodified pages evicted': 0
},
cache_walk: {
'Average difference between current eviction generation when the page was last considered': 0,
'Average on-disk page image size seen': 0,
'Average time in cache for pages that have been visited by the eviction server': 0,
'Average time in cache for pages that have not been visited by the eviction server': 0,
'Clean pages currently in cache': 0,
'Current eviction generation': 0,
'Dirty pages currently in cache': 0,
'Entries in the root page': 0,
'Internal pages currently in cache': 0,
'Leaf pages currently in cache': 0,
'Maximum difference between current eviction generation when the page was last considered': 0,
'Maximum page size seen': 0,
'Minimum on-disk page image size seen': 0,
'Number of pages never visited by eviction server': 0,
'On-disk page image sizes smaller than a single allocation unit': 0,
'Pages created in memory and never written': 0,
'Pages currently queued for eviction': 0,
'Pages that could not be queued for eviction': 0,
'Refs skipped during cache traversal': 0,
'Size of the root page': 0,
'Total number of pages currently in cache': 0
},
'checkpoint-cleanup': {
'pages added for eviction': 0,
'pages removed': 0,
'pages skipped during tree walk': 2512968,
'pages visited': 34227677
},
compression: {
'compressed page maximum internal page size prior to compression': 4096,
'compressed page maximum leaf page size prior to compression ': 131072,
'compressed pages read': 11130,
'compressed pages written': 112811,
'number of blocks with compress ratio greater than 64': 0,
'number of blocks with compress ratio smaller than 16': 0,
'number of blocks with compress ratio smaller than 2': 56,
'number of blocks with compress ratio smaller than 32': 0,
'number of blocks with compress ratio smaller than 4': 8943,
'number of blocks with compress ratio smaller than 64': 0,
'number of blocks with compress ratio smaller than 8': 2131,
'page written failed to compress': 0,
'page written was too small to compress': 28862
},
cursor: {
'Total number of entries skipped by cursor next calls': 0,
'Total number of entries skipped by cursor prev calls': 0,
'Total number of entries skipped to position the history store cursor': 0,
'Total number of times a search near has exited due to prefix config': 0,
'bulk loaded cursor insert calls': 0,
'cache cursors reuse count': 3596249,
'close calls that result in cache': 3596284,
'create calls': 1172,
'cursor next calls that skip due to a globally visible history store tombstone': 0,
'cursor next calls that skip greater than or equal to 100 entries': 0,
'cursor next calls that skip less than 100 entries': 0,
'cursor prev calls that skip due to a globally visible history store tombstone': 0,
'cursor prev calls that skip greater than or equal to 100 entries': 0,
'cursor prev calls that skip less than 100 entries': 1,
'insert calls': 333563,
'insert key and value bytes': 91453031,
modify: 25433,
'modify key and value bytes affected': 8507210,
'modify value bytes modified': 105204,
'next calls': 0,
'open cursor count': 1,
'operation restarted': 472,
'prev calls': 1,
'remove calls': 7392,
'remove key bytes removed': 29568,
'reserve calls': 0,
'reset calls': 13947838,
'search calls': Long("2963632356"),
'search history store calls': 0,
'search near calls': 0,
'truncate calls': 0,
'update calls': 0,
'update key and value bytes': 0,
'update value size change': 0
},
reconciliation: {
'approximate byte size of timestamps in pages written': 0,
'approximate byte size of transaction IDs in pages written': 0,
'dictionary matches': 0,
'fast-path pages deleted': 0,
'internal page key bytes discarded using suffix compression': 182916,
'internal page multi-block writes': 198,
'leaf page key bytes discarded using prefix compression': 0,
'leaf page multi-block writes': 4335,
'leaf-page overflow keys': 0,
'maximum blocks required for a page': 1,
'overflow values written': 0,
'page checksum matches': 0,
'page reconciliation calls': 73144,
'page reconciliation calls for eviction': 2,
'pages deleted': 0,
'pages written including an aggregated newest start durable timestamp ': 0,
'pages written including an aggregated newest stop durable timestamp ': 0,
'pages written including an aggregated newest stop timestamp ': 0,
'pages written including an aggregated newest stop transaction ID': 0,
'pages written including an aggregated newest transaction ID ': 40,
'pages written including an aggregated oldest start timestamp ': 0,
'pages written including an aggregated prepare': 0,
'pages written including at least one prepare': 0,
'pages written including at least one start durable timestamp': 0,
'pages written including at least one start timestamp': 0,
'pages written including at least one start transaction ID': 0,
'pages written including at least one stop durable timestamp': 0,
'pages written including at least one stop timestamp': 0,
'pages written including at least one stop transaction ID': 0,
'records written including a prepare': 0,
'records written including a start durable timestamp': 0,
'records written including a start timestamp': 0,
'records written including a start transaction ID': 0,
'records written including a stop durable timestamp': 0,
'records written including a stop timestamp': 0,
'records written including a stop transaction ID': 0
},
session: {
'object compaction': 0,
'tiered operations dequeued and processed': 0,
'tiered operations scheduled': 0,
'tiered storage local retention time (secs)': 0
},
transaction: {
'checkpoint has acquired a snapshot for its transaction': 0,
'race to read prepared update retry': 0,
'rollback to stable history store records with stop timestamps older than newer records': 0,
'rollback to stable inconsistent checkpoint': 0,
'rollback to stable keys removed': 0,
'rollback to stable keys restored': 0,
'rollback to stable restored tombstones from history store': 0,
'rollback to stable restored updates from history store': 0,
'rollback to stable skipping delete rle': 0,
'rollback to stable skipping stable rle': 0,
'rollback to stable sweeping history store keys': 0,
'rollback to stable updates removed from history store': 0,
'transaction checkpoints due to obsolete pages': 0,
'update conflicts': 91
}
},
sharded: false,
size: 683382465,
count: 4570560,
numOrphanDocs: 0,
storageSize: 234766336,
totalIndexSize: 306114560,
totalSize: 540880896,
indexSizes: {
id: 88096768,
'key_1_score-1': 66711552,
'key_1_value-1': 128233472,
expireAt_1: 23072768
},
avgObjSize: 149,
ns: 'nodebb.objects',
nindexes: 4,
scaleFactor: 1
}
nodebb> -
@The-SkyFoxx On weekend I try to update under 3.7.1. I really use 3.7.0. version right now
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@Nuran-Akimbek please see it ;
NodeBB 3.7.1
I normally don't make announcement topics for patch releases but 3.7.0 had a nasty memory leak issue due to our mongodb dependency. We noticed increased mem...
NodeBB Community (community.nodebb.org)
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N Nuran Akimbek referenced this topic on
