MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 09/22/01 through 09/28/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 39,080 2,113,691
MED90 7,435 166,751
MED85 4,790 47,816
MED80 4,108 23,740
MED75 3,778 17,137
MED66 3,839 22,957
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,753 45,832
2-4 a.m. 696 22,814
4-6 a.m. 141 18,350
6-8 a.m. 847 28,107
8-10 a.m. 4,244 169,954
10-12 a.m. 10,242 414,943
12-2 p.m. 11,829 381,441
2-4 p.m. 12,945 467,704
4-6 p.m. 9,009 337,001
6-8 p.m. 6,895 278,707
8-10 p.m. 2,517 138,421
10-12 p.m. 1,912 88,818
__________ _____________ _________________
Total: 63,030 2,392,092
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 4,362
Davis 600
Irvine 322
Los Angeles 538
Riverside 58
San Diego 600
San Francisco 752
Santa Barbara 8
Santa Cruz 1
Lawrence Berkeley 40
Lawrence Livermore 3
Los Alamos 0
MELWEB 0
Searchlight 4,916
Other - UC 50,558
Other-Network UC 272
_____
63,030
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 155,907
Davis 16,573
Irvine 2,216
Los Angeles 4,795
Riverside 3,344
San Diego 5,085
San Francisco 21,052
Santa Barbara 42
Santa Cruz 0
Lawrence Berkeley 368
Lawrence Livermore 84
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 2,177,147
Other-Network UC 5,479
_____
2,392,092
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 2.4
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.6
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:26
Average session length (minutes:seconds) 19:17
Longest session recorded (minutes:seconds) 219:06
Average number of searches completed per session 0.0
Retrievals per search - median 4.0
Retrievals per search - average 361.1
Retrievals per search - standard deviation 3856.2
Percent of searches completed with 0 results 30.9%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 63,030 11.2%
PRESENT 474,125 84.2%
INIT or CLOSE 25,780 4.6%
OTHER 142 0.0%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 4,523 5.0% 1,687 37.3% 4 826.4 4302.6
PERSONAL AUTHOR 20,343 22.5% 5,700 28.0% 7 109.9 1436.4
TITLE WORD 6,685 7.4% 2,453 36.7% 3 208.0 2713.0
SUBSET 162 0.2% 61 37.7% 16 130.2 358.3
SUBJECT WORD 68 0.1% 36 52.9% 14 911.2 1918.1
SUBJECT 1,293 1.4% 615 47.6% 21 583.1 3203.0
EXACT SUBJECT 2,823 3.1% 739 26.2% 24 545.6 4088.8
MAJOR SUBJECT 109 0.1% 36 33.0% 13 298.1 878.6
EXACT MAJOR SUBJ 247 0.3% 45 18.2% 33 254.4 714.5
EXACT TITLE 675 0.7% 362 53.6% 1 70.7 464.5
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 4,872 5.4% 966 19.8% 272 608.7 1490.1
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 22 0.0% 9 40.9% 4 11.5 21.0
KEYWORD 33,450 36.9% 11,163 33.4% 15 668.5 5965.5
DATE 5,309 5.9% 1,107 20.8% 156 278.1 476.7
LANGUAGE 3,697 4.1% 1,009 27.3% 23 337.2 2031.3
UNIQUE ID 70 0.1% 22 31.4% 1 1.0 0.0
ADDED 1,160 1.3% 490 42.2% 5 16.5 34.6
PUB TYPE 2,113 2.3% 548 25.9% 22 133.8 471.2
AUTHOR AFFIL. 424 0.5% 152 35.8% 9 124.0 798.8
CHEMICAL NAME 3 0.0% 1 33.3% 1 1.0 0.0
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 2,065 2.3% 671 32.5% 17 448.6 2619.1
AGE 177 0.2% 88 49.7% 11 114.6 292.9
ISN 1 0.0% 1 100% 0 0.0 0.0
ARTICLE 54 0.1% 6 11.1% 33 243.9 478.4
XXS 121 0.1% 45 37.2% 13 40.9 79.0
XMXS 71 0.1% 23 32.4% 16 522.4 2883.8
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 24 0.0% 21 87.5% 10 273.7 463.6
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 20,680 32.8% 6,337 30.6% 13 218.4 1763.4
Single 42,350 67.2% 13,135 31.0% 16 671.9 5510.2
PRESENT commands, by type:
MARC 38.7%
OPAC 25.4%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS