MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 02/10/01 through 02/16/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 54,317 2,800,061
MED90 10,684 202,943
MED85 8,103 102,486
MED80 7,036 47,525
MED75 6,687 28,496
MED66 6,888 44,782
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,326 42,215
2-4 a.m. 694 14,671
4-6 a.m. 271 14,406
6-8 a.m. 1,026 36,276
8-10 a.m. 6,467 254,773
10-12 a.m. 16,815 535,625
12-2 p.m. 16,284 572,324
2-4 p.m. 19,040 620,637
4-6 p.m. 14,664 551,957
6-8 p.m. 7,736 280,693
8-10 p.m. 5,387 190,411
10-12 p.m. 3,005 112,305
__________ _____________ _________________
Total: 93,715 3,226,293
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 365
Davis 584
Irvine 421
Los Angeles 803
Riverside 25
San Diego 759
San Francisco 996
Santa Barbara 2
Santa Cruz 9
Lawrence Berkeley 23
Lawrence Livermore 103
Los Alamos 0
MELWEB 75,978
Searchlight 13,226
Other - UC 66
Other-Network UC 355
_____
93,715
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,761
Davis 4,341
Irvine 2,377
Los Angeles 9,995
Riverside 193
San Diego 8,383
San Francisco 7,490
Santa Barbara 34
Santa Cruz 125
Lawrence Berkeley 254
Lawrence Livermore 433
Los Alamos 0
MELWEB 3,184,512
Searchlight 0
Other - UC 88
Other-Network UC 4,307
_____
3,226,293
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.7
Standard deviation in seconds 2.1
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:12
Average session length (minutes:seconds) 18:34
Longest session recorded (minutes:seconds) 224:08
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 390.9
Retrievals per search - standard deviation 4345.3
Percent of searches completed with 0 results 34.8%
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 93,715 13.6%
PRESENT 554,946 80.4%
INIT or CLOSE 41,093 6.0%
OTHER 545 0.1%
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 6,210 4.6% 2,380 38.3% 4 846.5 4900.6
PERSONAL AUTHOR 26,280 19.6% 7,564 28.8% 8 98.4 1101.8
TITLE WORD 10,690 8.0% 4,132 38.7% 4 217.4 1891.9
SUBSET 231 0.2% 55 23.8% 25 294.6 1672.4
SUBJECT WORD 228 0.2% 126 55.3% 20 6052.2 51059.9
SUBJECT 2,991 2.2% 1,651 55.2% 23 938.8 5904.4
EXACT SUBJECT 5,633 4.2% 1,402 24.9% 34 534.8 3161.5
MAJOR SUBJECT 180 0.1% 92 51.1% 16 151.5 393.9
EXACT MAJOR SUBJ 624 0.5% 143 22.9% 23 342.7 1938.7
EXACT TITLE 698 0.5% 422 60.5% 1 8.4 44.3
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,119 0.8% 280 25.0% 457 1746.0 3240.7
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 8 0.0% 3 37.5% 17 21.0 26.8
KEYWORD 56,601 42.3% 20,656 36.5% 20 737.2 5982.1
DATE 2,314 1.7% 697 30.1% 8 186.3 1921.9
LANGUAGE 7,960 6.0% 2,201 27.6% 28 463.9 3088.3
UNIQUE ID 157 0.1% 49 31.2% 1 1.3 1.1
ADDED 1,062 0.8% 1,062 100% 0 0.0 0.0
PUB TYPE 3,734 2.8% 913 24.4% 28 148.9 425.9
AUTHOR AFFIL. 771 0.6% 369 47.9% 11 60.6 432.2
CHEMICAL NAME 14 0.0% 5 35.7% 7 203.6 497.7
EXACT CHEMICAL 5 0.0% 2 40.0% 2 844.3 1459.8
AT 5,495 4.1% 1,748 31.8% 27 468.1 2096.7
AGE 266 0.2% 71 26.7% 17 92.5 310.5
ISN 2 0.0% 2 100% 0 0.0 0.0
ARTICLE 161 0.1% 49 30.4% 17 224.3 789.3
XXS 203 0.2% 111 54.7% 16 1478.1 12277.7
XMXS 69 0.1% 44 63.8% 79 149.2 188.5
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 61 0.0% 49 80.3% 8 35.6 67.7
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 26,327 28.1% 9,287 35.3% 9 288.9 2268.8
Single 67,388 71.9% 23,298 34.6% 18 719.2 6158.0
PRESENT commands, by type:
MARC 29.9%
OPAC 30.3%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS