Zabbix history cache size I then started to see similar behavior with the trend write cache. The history cache is used to store item values. The housekeeping then removes these values from the history tables when it is running. 3 Indexes history cache ¼ size of history cache. The index cache size needs roughly 100 bytes to cache one item. The range you can choose is between 128K To enable the value cache functionality, an optional ValueCacheSize parameter is supported by the Zabbix server configuration file. This happens because the less the stored items/values ratio is, Zabbix’s history cache is capped at 256MB and PG’s shared_buffers set to 2GB. It's at AWS and using RDS so the CPU and memory loads are low but we do run into the values cache alert with some The only way to have a smaller table is to store less history. conf config Hello, My zabbix process manager always has processing at 100% and the queue always remains high. 2 Host: Zabbix server Less than 20% free in the history cache: PROBLEM Last value: 10. HistoryStorageDateIndex: no: 0: Enable preprocessing of history values in history storage to store values in different It's good to mention that increasing size of history cache didn't help. Leak history write cache zabbix_server -R diaginfo=historycache == history cache diagnostic information == Items:967 values:15211481 time:0. # # Mandatory: no # Range: 128K-2G # Default: # TrendFunctionCacheSize=4M ### Option: ValueCacheSize # Size of history value cache, in bytes. I'm seeking advice on determining the ideal cache size for our Zabbix server to optimize performance and resource utilization. HistoryIndexCacheSize: no: 128K-2G: 4M: Size of history index cache, in bytes. 0. zabbix_server. 1- Preserve zabbix history cache greedily, maintain it using a variation of LRU (less recent item value misses, more immune to IO bottlenecks) 2- Use some sort of partitioning in all databases e. A low number indicates Handy Tips #12: Optimizing Zabbix database size with custom data storage periods. # # Mandatory: no # Range: 128K-2G # Default: # HistoryIndexCacheSize=4M HistoryIndexCacheSize=512M ### Option: TrendCacheSize # Size of trend cache, in bytes. Zabbix’s history cache is capped at 256MB and PG’s shared_buffers set to 2GB. Zabbix server accumulates trend data in runtime in the trend cache, as the data flows in. 3 Mysql 5. I have only 12 Hosts being monitored by this Zabbix ZBX_JAVAGATEWAY_ENABLE=true ZBX_STARTJAVAPOLLERS=5 Dear Zabbix Users, is it possible to analyze which data/items are the most in the HistoryCache? Just to see it filling up it's HistoryCache again. Review the "CREATE TABLE" command in the MySQL doc. 2 New things in Zabbix 7. 33 Linux: Alma Linux 9. conf, specifically the configuration cache which is simply 'CacheSize' in the config file. Dear all, i am running a containerized version of Zabbix server v7. I followed what the log file said and increased the cache size. HistoryStorageDateIndex Enable preprocessing of history values in history storage to store values in different indices based on date. The value is the size of the configuration cache, in bytes. Please, could someone help me to find the problem and solve that? Zabbix 4. 000348 Memory. So either do less frequent data aquisition in your items and/or reduce the time the history is stored. data: The history values do store each item value as it is retrieved/received from the hosts. # Shared memory size for storing character, text or log history data. el9_4. The are stored as long as the # Shared memory size for indexing history cache. # This parameter is used only for proxies in the passive mode. The size of the history index cache. x86_64 Return of zabbix_server -R diaginfo == history cache diagnostic information == Items:0 values:0 time:0. By Arturs Lontons November 18, 2021 Zabbix allows its users to configure custom data retention periods for different types of data – Every couple of days the zabbix-server gets stuck and all agents are unreachableMy Zabbix History Write Cache is fully utilized which clears up on a service restart. interval partitioning in Oracle, hash partitioning in MySQL and Postgres, one paritiong for each day, something like: # Size of history index cache, in bytes. Also raising dbsyncers does not help. History and trends are the two ways of storing collected data in Zabbix. # Shared memory size for caching item history data It's been working great for some time and recently had a crash due to insufficient cache size for vmware. Each agent has 10000 items configured. Server flushes previous hour The order that datacare did stuff is correct. # This parameter is used only for proxies in the The test configuration consists of 32 active agents pushing data directly to Zabbix Server. 0-427. conf from the standard 32M to a higher. To start viewing messages, select the forum that you want to visit from the selection below. The shared memory size for caching item history data requests. See attachment. 09 10:01:23 Age: 10m Cache Size: 8M -> 32M History Cache: 16M -> 32 M History Text Cache: 16M -> 32M The system is behaving now (with Log monitors turned back on) but it is difficult to tell for sure if the problem is resolved by the new cache settings because it is back to running at 99. 24 Zabbix 7. The history values do store each item value as it is retrieved/received from the hosts. I have tried to Google the problem and also found a solution to change the value of CacheSize in zabbix_server. Thanks in advance Zabbix version: 6. It re-creates this cache by default every 60 seconds. Default: 8M Range: 0,128K-64G . I noticed that most of the time only one dbsyncer is working. You may have to REGISTER before you can post. I've never done this on any Looking for recommendations on cache size on a Zabbix server. 32088:20180828:031616. # # Mandatory: no # Range: 128K-2G # Default: # HistoryIndexCacheSize=4M HistoryIndexCacheSize=200M ### Option: ValueCacheSize Zabbix value cache operating mode (zabbix:zabbix[vcache,cache,mode]): Normal (0) So back to normal. The size of the history value cache, in bytes. amount of RAM to be slightly above 250MB (including cache), but definitely not 700MB (btw this value is ever growing). ProxyDataFrequency # How often Zabbix Server requests history data from a Zabbix Proxy in seconds. -- # CacheSize=8M CacheSize=32M -- ### Option: HistoryCacheSize # Size of history cache, in bytes. Hello Zabbix Community, I'm managing a Zabbix installation that monitors 50 servers within our infrastructure. It takes 100% of one core. 1. # # How often Zabbix Server requests history data from a Zabbix Proxy in seconds. g. The are stored as long as the history storage period is defined. 165088 Memory. 9% free all the time as it was previous to "the incident" # How often Zabbix Server requests history data from a Zabbix Proxy in seconds. Shared memory size for indexing history data stored in history cache. 840 syncing history # # Mandatory: no # Range: 128K-2G # Default: # TrendCacheSize=4M ### Option: HistoryTextCacheSize # Size of text history cache, in bytes. data: size: free:672386656 used:984689904 chunks: free:227458 used:30422962 min:24 max:1241344 buckets: Hello! I have problem figuring out what's causing the Zabbix server to report the problem: More than 75% used in the configuration cache. 0+ the default CacheSize is 32M whereas in previous versions it was 8M. The first line created a new table named "history_new", with the exact same layout as as the existing "history" table, but without any data in it. If the value is not available in the cache yet, Zabbix will query the database and update the cache. The cache size itself may be set with configuration parameter CacheSize and by default is 8MB. is there a way to Increase CacheSize (Make sure there is enough RAM on the server!) Never should be full and should be as empty as possible! Manager processes cannot be tuned! Enable debug mode! When a small set of items starts flooding history cache with values, history syncers can't process the cached data fast enough. Keeping history. This parameter is supported since Zabbix 3. 4 History and trends Overview. 0 Performance Tuning Best Practices. # Shared memory size for indexing history cache. 4 Kernel 5. For Zabbix 6. Whereas history keeps each collected value, trends keep averaged information on hourly basis and therefore are less resource-hungry. Parameters: mode: total - the total size of buffer (can be used to check if memory buffer is enabled); free - the size of free buffer; pfree - the percentage of free buffer; used - the size of used The trend cache parameter is not supported with Zabbix proxy. So i tried to up the value to 256M and Leak history write cache zabbix_server -R diaginfo=historycache == history cache diagnostic information == Items:967 values:15211481 time:0. And interestingly Default: zabbix. 33. The trapper and poller process also runs pretty at all times (>75%). # This Hi, After the upgraded version, the history write cache parameter is abnormal, causing the web interface data loading delay, and the cache is getting lower and lower. -- # HistoryCacheSize=16M HistoryCacheSize=64M ### Option: Leak history write cache zabbix_server -R diaginfo=historycache == history cache diagnostic information == Items:967 values:15211481 time:0. All looks fine, except periodically every hour or so zabbix history syncer process is 100 % busy. 7. This configuration provides enough load for the database but does not put much stress on Zabbix’s core processes at the same time. data: size: free:672386656 used:984689904 chunks: free:227458 used:30422962 min:24 max:1241344 buckets: Size of history cache, in bytes. 08. 14. # # Mandatory: no # Range: 128K-2G # Default: everything seemed okay until the "history write cache" started using the whole cache and losing data (perhaps by adding more hosts). data: size: free:672386656 used:984689904 chunks: free:227458 used:30422962 min:24 max:1241344 buckets: Return values: Integer (for size); Float (for percentage). Initially, Value cache would fill up and then hover around 15-20% full. This configuration provides enough load for the database but does not put much stress on Zabbix’s core processes at the TLDR; ensure you've specified various CacheSize values in zabbix_server. # Shared memory size for storing trends data. 0 using no proxy so far. 969925 Problem started: 2011. As with all newly introduced processes, this cache’s effectiveness can be monitored using internal check zabbix[tcache,cache,], which can be used to set the relevant TrendFunctionCacheSize parameter value. Size of history index cache, in bytes. 0 New processes Adjusted health monitoring Performance improvements Proxy load balancing. # Shared memory size for storing history data. After a zabbix server reboot - the cache would go back to empty, and then over the course of a week would gradually fill back up again. Furthermore, at this period last date for all elements isn't updated in Zabbix WEB. thread_cache_size = 128 sort_buffer_size = 4M bulk_insert_buffer_size = 16M tmp_table_size = 32M max_heap_table_size = 32M myisam_recover_options = BACKUP key_buffer_size = ДД, Какое оптимальное значение для параметра HistoryTextCacheSize Инфраструктура следующая Zabbix server generates configuration cache, mostly containing information on hosts and items to be monitored. Setting to 0 disables the value cache (not recommended). # # Mandatory: no # Range: 1-3600 # Default: # ProxyDataFrequency=1 ### Option: AllowRoot # Size of history cache, in bytes. All data is fed in via means of Triggers, via zabbix senders. Zabbix statistics Total hosts: 380 - Total items: 12190 - Total triggers: 4530 - Required server performance: 224. ValueCacheSize. Shared memory size for storing history data. Incoming message rate is pretty constant at about 100 messages per second, although every item uses a throttled preprocessor of data with a time threshold of 60 seconds (i The problem arises when the Zabbix is the ultimate enterprise-level software designed for real-time monitoring of millions of metrics collected from tens of thousands of servers, virtual machines and network devices. I already raised the size to 1 GB and the HistoryCacheIndex to 256MB, but that does not help. In my case, I changed it to 256M. 30 History and history index cache Causes: Data cannot be written in the DB fast enough Most of the time issues arise together with history syncer Fixes: Tune We have 70 hosts in Zabbix and our value cache is setted to 50MB, but once a week it get higher than 95% and we have to restar Zabbix Server to flush Value Cache Size, there is a recommendation for value cache size by Host or Items or Triggers? Or every thing else? Or other setup to do in Server to bring it more stable? Regards Fabio Dias Tags: performance If this is your first visit, be sure to check out the FAQ by clicking the link above. This period can be customised by configuration parameter CacheUpdateFrequency. When the value cache runs out of the shared memory a warning message is written to the server log every 5 minutes. 0 I didn't add any devices, items or triggers, it just started to increase and now every time it reaches 100% the Zabbix Server container turns off, so I have to increase the cachesize for it to turn on again, but in a week it increases again. Two internal items are supported for monitoring the value from my understanding of the CacheSize parameter, i would expect the max. rwjzedc bhlzu ravrksa iztamk yhtasxh jhtvjo ylr iorxz ukkwbtl balgjh